mono/metadata/w32file-unix.c

   1 /**
   2  * \file
   3  */
   4
   5 #include <config.h>
   6 #include <glib.h>
   7
   8 #include <stdlib.h>
   9 #include <fcntl.h>
  10 #include <unistd.h>
  11 #include <errno.h>
  12 #include <string.h>
  13 #include <sys/stat.h>
  14 #ifdef HAVE_SYS_STATVFS_H
  15 #include <sys/statvfs.h>
  16 #endif
  17 #if defined(HAVE_SYS_STATFS_H)
  18 #include <sys/statfs.h>
  19 #endif
  20 #if defined(HAVE_SYS_PARAM_H) && defined(HAVE_SYS_MOUNT_H)
  21 #include <sys/param.h>
  22 #include <sys/mount.h>
  23 #endif
  24 #include <sys/types.h>
  25 #include <stdio.h>
  26 #include <utime.h>
  27 #ifdef __linux__
  28 #include <sys/ioctl.h>
  29 #include <linux/fs.h>
  30 #include <mono/utils/linux_magic.h>
  31 #endif
  32 #ifdef _AIX
  33 #include <sys/mntctl.h>
  34 #include <sys/vmount.h>
  35 #endif
  36 #include <sys/time.h>
  37 #ifdef HAVE_DIRENT_H
  38 # include <dirent.h>
  39 #endif
  40 #if HOST_DARWIN
  41 #include <dlfcn.h>
  42 #endif
  43
  44 #include "w32file.h"
  45 #include "w32file-internals.h"
  46 #include "w32file-unix-glob.h"
  47 #include "w32error.h"
  48 #include "fdhandle.h"
  49 #include "utils/mono-io-portability.h"
  50 #include "utils/mono-logger-internals.h"
  51 #include "utils/mono-os-mutex.h"
  52 #include "utils/mono-threads.h"
  53 #include "utils/mono-threads-api.h"
  54 #include "utils/strenc.h"
  55 #include "utils/refcount.h"
  56 #include "icall-decl.h"
  57
  58 #define NANOSECONDS_PER_MICROSECOND 1000LL
  59 #define TICKS_PER_MICROSECOND 10L
  60 #define TICKS_PER_MILLISECOND 10000L
  61 #define TICKS_PER_SECOND 10000000LL
  62 #define TICKS_PER_MINUTE 600000000LL
  63 #define TICKS_PER_HOUR 36000000000LL
  64 #define TICKS_PER_DAY 864000000000LL
  65
  66 // Constants to convert Unix times to the API expected by .NET and Windows
  67 #define CONVERT_BASE  116444736000000000ULL
  68
  69 #define INVALID_HANDLE_VALUE ((gpointer)-1)
  70
  71 typedef struct {
  72         guint64 device;
  73         guint64 inode;
  74         guint32 sharemode;
  75         guint32 access;
  76         guint32 handle_refs;
  77         guint32 timestamp;
  78 } FileShare;
  79
  80 /* Currently used for both FILE, CONSOLE and PIPE handle types.
  81  * This may have to change in future. */
  82 typedef struct {
  83         MonoFDHandle fdhandle;
  84         gchar *filename;
  85         FileShare *share_info;  /* Pointer into shared mem */
  86         guint32 security_attributes;
  87         guint32 fileaccess;
  88         guint32 sharemode;
  89         guint32 attrs;
  90 } FileHandle;
  91
  92 typedef struct {
  93         MonoRefCount ref;
  94         MonoCoopMutex mutex;
  95         gchar **namelist;
  96         gchar *dir_part;
  97         gint num;
  98         gsize count;
  99 } FindHandle;
 100
 101 /*
 102  * If SHM is disabled, this will point to a hash of FileShare structures, otherwise
 103  * it will be NULL. We use this instead of _wapi_fileshare_layout to avoid allocating a
 104  * 4MB array.
 105  */
 106 static GHashTable *file_share_table;
 107 static MonoCoopMutex file_share_mutex;
 108
 109 static GHashTable *finds;
 110 static MonoCoopMutex finds_mutex;
 111
 112 #if HOST_DARWIN
 113 typedef int (*clonefile_fn) (const char *from, const char *to, int flags);
 114 static MonoDl *libc_handle;
 115 static clonefile_fn clonefile_ptr;
 116 #endif
 117
 118 static void
 119 time_t_to_filetime (time_t timeval, FILETIME *filetime)
 120 {
 121         guint64 ticks;
 122
 123         ticks = ((guint64)timeval * 10000000) + CONVERT_BASE;
 124         filetime->dwLowDateTime = ticks & 0xFFFFFFFF;
 125         filetime->dwHighDateTime = ticks >> 32;
 126 }
 127
 128 static FileHandle*
 129 file_data_create (MonoFDType type, gint fd)
 130 {
 131         FileHandle *filehandle;
 132
 133         filehandle = g_new0 (FileHandle, 1);
 134         mono_fdhandle_init ((MonoFDHandle*) filehandle, type, fd);
 135
 136         return filehandle;
 137 }
 138
 139 static gint
 140 _wapi_unlink (const gchar *pathname);
 141
 142 static void
 143 file_share_release (FileShare *share_info);
 144
 145 static void
 146 file_data_close (MonoFDHandle *fdhandle)
 147 {
 148         FileHandle* filehandle;
 149
 150         filehandle = (FileHandle*) fdhandle;
 151         g_assert (filehandle);
 152
 153         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: closing fd %d", __func__, ((MonoFDHandle*) filehandle)->fd);
 154
 155         if (((MonoFDHandle*) filehandle)->type == MONO_FDTYPE_FILE && (filehandle->attrs & FILE_FLAG_DELETE_ON_CLOSE)) {
 156                 _wapi_unlink (filehandle->filename);
 157         }
 158
 159         if (((MonoFDHandle*) filehandle)->type != MONO_FDTYPE_CONSOLE || ((MonoFDHandle*) filehandle)->fd > 2) {
 160                 if (filehandle->share_info) {
 161                         file_share_release (filehandle->share_info);
 162                         filehandle->share_info = NULL;
 163                 }
 164
 165                 MONO_ENTER_GC_SAFE;
 166                 close (((MonoFDHandle*) filehandle)->fd);
 167                 MONO_EXIT_GC_SAFE;
 168         }
 169 }
 170
 171 static void
 172 file_data_destroy (MonoFDHandle *fdhandle)
 173 {
 174         FileHandle *filehandle;
 175
 176         filehandle = (FileHandle*) fdhandle;
 177         g_assert (filehandle);
 178
 179         if (filehandle->filename)
 180                 g_free (filehandle->filename);
 181
 182         g_free (filehandle);
 183 }
 184
 185 static void
 186 file_share_release (FileShare *share_info)
 187 {
 188         /* Prevent new entries racing with us */
 189         mono_coop_mutex_lock (&file_share_mutex);
 190
 191         g_assert (share_info->handle_refs > 0);
 192         share_info->handle_refs -= 1;
 193
 194         if (share_info->handle_refs == 0) {
 195                 g_hash_table_remove (file_share_table, share_info);
 196                 // g_free (share_info);
 197         }
 198
 199         mono_coop_mutex_unlock (&file_share_mutex);
 200 }
 201
 202 static gint
 203 file_share_equal (gconstpointer ka, gconstpointer kb)
 204 {
 205         const FileShare *s1 = (const FileShare *)ka;
 206         const FileShare *s2 = (const FileShare *)kb;
 207
 208         return (s1->device == s2->device && s1->inode == s2->inode) ? 1 : 0;
 209 }
 210
 211 static guint
 212 file_share_hash (gconstpointer data)
 213 {
 214         const FileShare *s = (const FileShare *)data;
 215
 216         return s->inode;
 217 }
 218
 219 static gboolean
 220 file_share_get (guint64 device, guint64 inode, guint32 new_sharemode, guint32 new_access,
 221         guint32 *old_sharemode, guint32 *old_access, FileShare **share_info)
 222 {
 223         FileShare *file_share;
 224         gboolean exists = FALSE;
 225
 226         /* Prevent new entries racing with us */
 227         mono_coop_mutex_lock (&file_share_mutex);
 228
 229         FileShare tmp;
 230
 231         /*
 232          * Instead of allocating a 4MB array, we use a hash table to keep track of this
 233          * info. This is needed even if SHM is disabled, to track sharing inside
 234          * the current process.
 235          */
 236         if (!file_share_table)
 237                 file_share_table = g_hash_table_new_full (file_share_hash, file_share_equal, NULL, g_free);
 238
 239         tmp.device = device;
 240         tmp.inode = inode;
 241
 242         file_share = (FileShare *)g_hash_table_lookup (file_share_table, &tmp);
 243         if (file_share) {
 244                 *old_sharemode = file_share->sharemode;
 245                 *old_access = file_share->access;
 246                 *share_info = file_share;
 247
 248                 g_assert (file_share->handle_refs > 0);
 249                 file_share->handle_refs += 1;
 250
 251                 exists = TRUE;
 252         } else {
 253                 file_share = g_new0 (FileShare, 1);
 254
 255                 file_share->device = device;
 256                 file_share->inode = inode;
 257                 file_share->sharemode = new_sharemode;
 258                 file_share->access = new_access;
 259                 file_share->handle_refs = 1;
 260                 *share_info = file_share;
 261
 262                 g_hash_table_insert (file_share_table, file_share, file_share);
 263         }
 264
 265         mono_coop_mutex_unlock (&file_share_mutex);
 266
 267         return(exists);
 268 }
 269
 270 static gint
 271 _wapi_open (const gchar *pathname, gint flags, mode_t mode)
 272 {
 273         gint fd;
 274         gchar *located_filename;
 275
 276         if (flags & O_CREAT) {
 277                 located_filename = mono_portability_find_file (pathname, FALSE);
 278                 if (located_filename == NULL) {
 279                         MONO_ENTER_GC_SAFE;
 280                         fd = open (pathname, flags, mode);
 281                         MONO_EXIT_GC_SAFE;
 282                 } else {
 283                         MONO_ENTER_GC_SAFE;
 284                         fd = open (located_filename, flags, mode);
 285                         MONO_EXIT_GC_SAFE;
 286                         g_free (located_filename);
 287                 }
 288         } else {
 289                 MONO_ENTER_GC_SAFE;
 290                 fd = open (pathname, flags, mode);
 291                 MONO_EXIT_GC_SAFE;
 292                 if (fd == -1 && (errno == ENOENT || errno == ENOTDIR) && IS_PORTABILITY_SET) {
 293                         gint saved_errno = errno;
 294                         located_filename = mono_portability_find_file (pathname, TRUE);
 295
 296                         if (located_filename == NULL) {
 297                                 errno = saved_errno;
 298                                 return -1;
 299                         }
 300
 301                         MONO_ENTER_GC_SAFE;
 302                         fd = open (located_filename, flags, mode);
 303                         MONO_EXIT_GC_SAFE;
 304                         g_free (located_filename);
 305                 }
 306         }
 307
 308         return(fd);
 309 }
 310
 311 static gint
 312 _wapi_access (const gchar *pathname, gint mode)
 313 {
 314         gint ret;
 315
 316         MONO_ENTER_GC_SAFE;
 317         ret = access (pathname, mode);
 318         MONO_EXIT_GC_SAFE;
 319         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR) && IS_PORTABILITY_SET) {
 320                 gint saved_errno = errno;
 321                 gchar *located_filename = mono_portability_find_file (pathname, TRUE);
 322
 323                 if (located_filename == NULL) {
 324                         errno = saved_errno;
 325                         return -1;
 326                 }
 327
 328                 MONO_ENTER_GC_SAFE;
 329                 ret = access (located_filename, mode);
 330                 MONO_EXIT_GC_SAFE;
 331                 g_free (located_filename);
 332         }
 333
 334         return ret;
 335 }
 336
 337 static gint
 338 _wapi_chmod (const gchar *pathname, mode_t mode)
 339 {
 340         gint ret;
 341
 342         MONO_ENTER_GC_SAFE;
 343         ret = chmod (pathname, mode);
 344         MONO_EXIT_GC_SAFE;
 345         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR) && IS_PORTABILITY_SET) {
 346                 gint saved_errno = errno;
 347                 gchar *located_filename = mono_portability_find_file (pathname, TRUE);
 348
 349                 if (located_filename == NULL) {
 350                         errno = saved_errno;
 351                         return -1;
 352                 }
 353
 354                 MONO_ENTER_GC_SAFE;
 355                 ret = chmod (located_filename, mode);
 356                 MONO_EXIT_GC_SAFE;
 357                 g_free (located_filename);
 358         }
 359
 360         return ret;
 361 }
 362
 363 #ifndef HAVE_STRUCT_TIMEVAL
 364 static gint
 365 _wapi_utime (const gchar *filename, const struct utimbuf *buf)
 366 {
 367         gint ret;
 368
 369         MONO_ENTER_GC_SAFE;
 370         ret = utime (filename, buf);
 371         MONO_EXIT_GC_SAFE;
 372         if (ret == -1 && errno == ENOENT && IS_PORTABILITY_SET) {
 373                 gint saved_errno = errno;
 374                 gchar *located_filename = mono_portability_find_file (filename, TRUE);
 375
 376                 if (located_filename == NULL) {
 377                         errno = saved_errno;
 378                         return -1;
 379                 }
 380
 381                 MONO_ENTER_GC_SAFE;
 382                 ret = utime (located_filename, buf);
 383                 MONO_EXIT_GC_SAFE;
 384                 g_free (located_filename);
 385         }
 386
 387         return ret;
 388 }
 389
 390 #else
 391 static gint
 392 _wapi_utimes (const gchar *filename, const struct timeval times[2])
 393 {
 394         gint ret;
 395
 396         MONO_ENTER_GC_SAFE;
 397         ret = utimes (filename, times);
 398         MONO_EXIT_GC_SAFE;
 399         if (ret == -1 && errno == ENOENT && IS_PORTABILITY_SET) {
 400                 gint saved_errno = errno;
 401                 gchar *located_filename = mono_portability_find_file (filename, TRUE);
 402
 403                 if (located_filename == NULL) {
 404                         errno = saved_errno;
 405                         return -1;
 406                 }
 407
 408                 MONO_ENTER_GC_SAFE;
 409                 ret = utimes (located_filename, times);
 410                 MONO_EXIT_GC_SAFE;
 411                 g_free (located_filename);
 412         }
 413
 414         return ret;
 415 }
 416 #endif
 417
 418 static gint
 419 _wapi_unlink (const gchar *pathname)
 420 {
 421         gint ret;
 422
 423         MONO_ENTER_GC_SAFE;
 424         ret = unlink (pathname);
 425         MONO_EXIT_GC_SAFE;
 426         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR || errno == EISDIR) && IS_PORTABILITY_SET) {
 427                 gint saved_errno = errno;
 428                 gchar *located_filename = mono_portability_find_file (pathname, TRUE);
 429
 430                 if (located_filename == NULL) {
 431                         errno = saved_errno;
 432                         return -1;
 433                 }
 434
 435                 MONO_ENTER_GC_SAFE;
 436                 ret = unlink (located_filename);
 437                 MONO_EXIT_GC_SAFE;
 438                 g_free (located_filename);
 439         }
 440
 441         return ret;
 442 }
 443
 444 static gint
 445 _wapi_rename (const gchar *oldpath, const gchar *newpath)
 446 {
 447         gint ret;
 448         gchar *located_newpath = mono_portability_find_file (newpath, FALSE);
 449
 450         if (located_newpath == NULL) {
 451                 MONO_ENTER_GC_SAFE;
 452                 ret = rename (oldpath, newpath);
 453                 MONO_EXIT_GC_SAFE;
 454         } else {
 455                 MONO_ENTER_GC_SAFE;
 456                 ret = rename (oldpath, located_newpath);
 457                 MONO_EXIT_GC_SAFE;
 458
 459                 if (ret == -1 && (errno == EISDIR || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EXDEV) && IS_PORTABILITY_SET) {
 460                         gint saved_errno = errno;
 461                         gchar *located_oldpath = mono_portability_find_file (oldpath, TRUE);
 462
 463                         if (located_oldpath == NULL) {
 464                                 g_free (located_oldpath);
 465                                 g_free (located_newpath);
 466
 467                                 errno = saved_errno;
 468                                 return -1;
 469                         }
 470
 471                         MONO_ENTER_GC_SAFE;
 472                         ret = rename (located_oldpath, located_newpath);
 473                         MONO_EXIT_GC_SAFE;
 474                         g_free (located_oldpath);
 475                 }
 476                 g_free (located_newpath);
 477         }
 478
 479         return ret;
 480 }
 481
 482 static gint
 483 _wapi_stat (const gchar *path, struct stat *buf)
 484 {
 485         gint ret;
 486
 487         MONO_ENTER_GC_SAFE;
 488         ret = stat (path, buf);
 489         MONO_EXIT_GC_SAFE;
 490         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR) && IS_PORTABILITY_SET) {
 491                 gint saved_errno = errno;
 492                 gchar *located_filename = mono_portability_find_file (path, TRUE);
 493
 494                 if (located_filename == NULL) {
 495                         errno = saved_errno;
 496                         return -1;
 497                 }
 498
 499                 MONO_ENTER_GC_SAFE;
 500                 ret = stat (located_filename, buf);
 501                 MONO_EXIT_GC_SAFE;
 502                 g_free (located_filename);
 503         }
 504
 505         return ret;
 506 }
 507
 508 static gint
 509 _wapi_lstat (const gchar *path, struct stat *buf)
 510 {
 511         gint ret;
 512
 513         MONO_ENTER_GC_SAFE;
 514         ret = lstat (path, buf);
 515         MONO_EXIT_GC_SAFE;
 516         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR) && IS_PORTABILITY_SET) {
 517                 gint saved_errno = errno;
 518                 gchar *located_filename = mono_portability_find_file (path, TRUE);
 519
 520                 if (located_filename == NULL) {
 521                         errno = saved_errno;
 522                         return -1;
 523                 }
 524
 525                 ret = lstat (located_filename, buf);
 526                 g_free (located_filename);
 527         }
 528
 529         return ret;
 530 }
 531
 532 static gint
 533 _wapi_mkdir (const gchar *pathname, mode_t mode)
 534 {
 535         gint ret;
 536         gchar *located_filename = mono_portability_find_file (pathname, FALSE);
 537
 538         if (located_filename == NULL) {
 539                 MONO_ENTER_GC_SAFE;
 540                 ret = mkdir (pathname, mode);
 541                 MONO_EXIT_GC_SAFE;
 542         } else {
 543                 MONO_ENTER_GC_SAFE;
 544                 ret = mkdir (located_filename, mode);
 545                 MONO_EXIT_GC_SAFE;
 546                 g_free (located_filename);
 547         }
 548
 549         return ret;
 550 }
 551
 552 static gint
 553 _wapi_rmdir (const gchar *pathname)
 554 {
 555         gint ret;
 556
 557         MONO_ENTER_GC_SAFE;
 558         ret = rmdir (pathname);
 559         MONO_EXIT_GC_SAFE;
 560         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR || errno == ENAMETOOLONG) && IS_PORTABILITY_SET) {
 561                 gint saved_errno = errno;
 562                 gchar *located_filename = mono_portability_find_file (pathname, TRUE);
 563
 564                 if (located_filename == NULL) {
 565                         errno = saved_errno;
 566                         return -1;
 567                 }
 568
 569                 MONO_ENTER_GC_SAFE;
 570                 ret = rmdir (located_filename);
 571                 MONO_EXIT_GC_SAFE;
 572                 g_free (located_filename);
 573         }
 574
 575         return ret;
 576 }
 577
 578 static gint
 579 _wapi_chdir (const gchar *path)
 580 {
 581         gint ret;
 582
 583         MONO_ENTER_GC_SAFE;
 584         ret = chdir (path);
 585         MONO_EXIT_GC_SAFE;
 586         if (ret == -1 && (errno == ENOENT || errno == ENOTDIR || errno == ENAMETOOLONG) && IS_PORTABILITY_SET) {
 587                 gint saved_errno = errno;
 588                 gchar *located_filename = mono_portability_find_file (path, TRUE);
 589
 590                 if (located_filename == NULL) {
 591                         errno = saved_errno;
 592                         return -1;
 593                 }
 594
 595                 MONO_ENTER_GC_SAFE;
 596                 ret = chdir (located_filename);
 597                 MONO_EXIT_GC_SAFE;
 598                 g_free (located_filename);
 599         }
 600
 601         return ret;
 602 }
 603
 604 static gchar*
 605 _wapi_basename (const gchar *filename)
 606 {
 607         gchar *new_filename = g_strdup (filename), *ret;
 608
 609         if (IS_PORTABILITY_SET)
 610                 g_strdelimit (new_filename, '\\', '/');
 611
 612         if (IS_PORTABILITY_DRIVE && g_ascii_isalpha (new_filename[0]) && (new_filename[1] == ':')) {
 613                 gint len = strlen (new_filename);
 614
 615                 g_memmove (new_filename, new_filename + 2, len - 2);
 616                 new_filename[len - 2] = '\0';
 617         }
 618
 619         ret = g_path_get_basename (new_filename);
 620         g_free (new_filename);
 621
 622         return ret;
 623 }
 624
 625 static gchar*
 626 _wapi_dirname (const gchar *filename)
 627 {
 628         gchar *new_filename = g_strdup (filename), *ret;
 629
 630         if (IS_PORTABILITY_SET)
 631                 g_strdelimit (new_filename, '\\', '/');
 632
 633         if (IS_PORTABILITY_DRIVE && g_ascii_isalpha (new_filename[0]) && (new_filename[1] == ':')) {
 634                 gint len = strlen (new_filename);
 635
 636                 g_memmove (new_filename, new_filename + 2, len - 2);
 637                 new_filename[len - 2] = '\0';
 638         }
 639
 640         ret = g_path_get_dirname (new_filename);
 641         g_free (new_filename);
 642
 643         return ret;
 644 }
 645
 646 static GDir*
 647 _wapi_g_dir_open (const gchar *path, guint flags, GError **gerror)
 648 {
 649         GDir *ret;
 650
 651         MONO_ENTER_GC_SAFE;
 652         ret = g_dir_open (path, flags, gerror);
 653         MONO_EXIT_GC_SAFE;
 654         if (ret == NULL && ((*gerror)->code == G_FILE_ERROR_NOENT || (*gerror)->code == G_FILE_ERROR_NOTDIR || (*gerror)->code == G_FILE_ERROR_NAMETOOLONG) && IS_PORTABILITY_SET) {
 655                 gchar *located_filename = mono_portability_find_file (path, TRUE);
 656                 GError *tmp_error = NULL;
 657
 658                 if (located_filename == NULL) {
 659                         return(NULL);
 660                 }
 661
 662                 MONO_ENTER_GC_SAFE;
 663                 ret = g_dir_open (located_filename, flags, &tmp_error);
 664                 MONO_EXIT_GC_SAFE;
 665                 g_free (located_filename);
 666                 if (tmp_error == NULL) {
 667                         g_clear_error (gerror);
 668                 }
 669         }
 670
 671         return ret;
 672 }
 673
 674 static gint
 675 get_errno_from_g_file_error (gint error)
 676 {
 677         switch (error) {
 678 #ifdef EACCES
 679         case G_FILE_ERROR_ACCES: return EACCES;
 680 #endif
 681 #ifdef ENAMETOOLONG
 682         case G_FILE_ERROR_NAMETOOLONG: return ENAMETOOLONG;
 683 #endif
 684 #ifdef ENOENT
 685         case G_FILE_ERROR_NOENT: return ENOENT;
 686 #endif
 687 #ifdef ENOTDIR
 688         case G_FILE_ERROR_NOTDIR: return ENOTDIR;
 689 #endif
 690 #ifdef ENXIO
 691         case G_FILE_ERROR_NXIO: return ENXIO;
 692 #endif
 693 #ifdef ENODEV
 694         case G_FILE_ERROR_NODEV: return ENODEV;
 695 #endif
 696 #ifdef EROFS
 697         case G_FILE_ERROR_ROFS: return EROFS;
 698 #endif
 699 #ifdef ETXTBSY
 700         case G_FILE_ERROR_TXTBSY: return ETXTBSY;
 701 #endif
 702 #ifdef EFAULT
 703         case G_FILE_ERROR_FAULT: return EFAULT;
 704 #endif
 705 #ifdef ELOOP
 706         case G_FILE_ERROR_LOOP: return ELOOP;
 707 #endif
 708 #ifdef ENOSPC
 709         case G_FILE_ERROR_NOSPC: return ENOSPC;
 710 #endif
 711 #ifdef ENOMEM
 712         case G_FILE_ERROR_NOMEM: return ENOMEM;
 713 #endif
 714 #ifdef EMFILE
 715         case G_FILE_ERROR_MFILE: return EMFILE;
 716 #endif
 717 #ifdef ENFILE
 718         case G_FILE_ERROR_NFILE: return ENFILE;
 719 #endif
 720 #ifdef EBADF
 721         case G_FILE_ERROR_BADF: return EBADF;
 722 #endif
 723 #ifdef EINVAL
 724         case G_FILE_ERROR_INVAL: return EINVAL;
 725 #endif
 726 #ifdef EPIPE
 727         case G_FILE_ERROR_PIPE: return EPIPE;
 728 #endif
 729 #ifdef EAGAIN
 730         case G_FILE_ERROR_AGAIN: return EAGAIN;
 731 #endif
 732 #ifdef EINTR
 733         case G_FILE_ERROR_INTR: return EINTR;
 734 #endif
 735 #ifdef EIO
 736         case G_FILE_ERROR_IO: return EIO;
 737 #endif
 738 #ifdef EPERM
 739         case G_FILE_ERROR_PERM: return EPERM;
 740 #endif
 741         case G_FILE_ERROR_FAILED: return ERROR_INVALID_PARAMETER;
 742         default:
 743                 g_assert_not_reached ();
 744         }
 745 }
 746
 747 static gint
 748 file_compare (gconstpointer a, gconstpointer b)
 749 {
 750         gchar *astr = *(gchar **) a;
 751         gchar *bstr = *(gchar **) b;
 752
 753         return strcmp (astr, bstr);
 754 }
 755
 756 /* scandir using glib */
 757 static gint
 758 _wapi_io_scandir (const gchar *dirname, const gchar *pattern, gchar ***namelist)
 759 {
 760         GError *gerror = NULL;
 761         GDir *dir;
 762         GPtrArray *names;
 763         gint result;
 764         mono_w32file_unix_glob_t glob_buf;
 765         gint flags = 0, i;
 766
 767         dir = _wapi_g_dir_open (dirname, 0, &gerror);
 768         if (dir == NULL) {
 769                 /* g_dir_open returns ENOENT on directories on which we don't
 770                  * have read/x permission */
 771                 gint errnum = get_errno_from_g_file_error (gerror->code);
 772                 g_error_free (gerror);
 773                 if (errnum == ENOENT &&
 774                     !_wapi_access (dirname, F_OK) &&
 775                     _wapi_access (dirname, R_OK|X_OK)) {
 776                         errnum = EACCES;
 777                 }
 778
 779                 errno = errnum;
 780                 return -1;
 781         }
 782
 783         if (IS_PORTABILITY_CASE) {
 784                 flags = W32FILE_UNIX_GLOB_IGNORECASE;
 785         }
 786
 787         result = mono_w32file_unix_glob (dir, pattern, flags, &glob_buf);
 788         if (g_str_has_suffix (pattern, ".*")) {
 789                 /* Special-case the patterns ending in '.*', as
 790                  * windows also matches entries with no extension with
 791                  * this pattern.
 792                  *
 793                  * TODO: should this be a MONO_IOMAP option?
 794                  */
 795                 gchar *pattern2 = g_strndup (pattern, strlen (pattern) - 2);
 796                 gint result2;
 797
 798                 MONO_ENTER_GC_SAFE;
 799                 g_dir_rewind (dir);
 800                 MONO_EXIT_GC_SAFE;
 801                 result2 = mono_w32file_unix_glob (dir, pattern2, flags | W32FILE_UNIX_GLOB_APPEND | W32FILE_UNIX_GLOB_UNIQUE, &glob_buf);
 802
 803                 g_free (pattern2);
 804
 805                 if (result != 0) {
 806                         result = result2;
 807                 }
 808         }
 809
 810         MONO_ENTER_GC_SAFE;
 811         g_dir_close (dir);
 812         MONO_EXIT_GC_SAFE;
 813         if (glob_buf.gl_pathc == 0) {
 814                 return(0);
 815         } else if (result != 0) {
 816                 return -1;
 817         }
 818
 819         names = g_ptr_array_new ();
 820         for (i = 0; i < glob_buf.gl_pathc; i++) {
 821                 g_ptr_array_add (names, g_strdup (glob_buf.gl_pathv[i]));
 822         }
 823
 824         mono_w32file_unix_globfree (&glob_buf);
 825
 826         result = names->len;
 827         if (result > 0) {
 828                 g_ptr_array_sort (names, file_compare);
 829                 g_ptr_array_set_size (names, result + 1);
 830
 831                 *namelist = (gchar **) g_ptr_array_free (names, FALSE);
 832         } else {
 833                 g_ptr_array_free (names, TRUE);
 834         }
 835
 836         return result;
 837 }
 838
 839 static gboolean
 840 _wapi_lock_file_region (gint fd, off_t offset, off_t length)
 841 {
 842         struct flock lock_data;
 843         gint ret;
 844
 845         if (offset < 0 || length < 0) {
 846                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
 847                 return FALSE;
 848         }
 849
 850         lock_data.l_type = F_WRLCK;
 851         lock_data.l_whence = SEEK_SET;
 852         lock_data.l_start = offset;
 853         lock_data.l_len = length;
 854
 855         do {
 856                 ret = fcntl (fd, F_SETLK, &lock_data);
 857         } while(ret == -1 && errno == EINTR);
 858
 859         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fcntl returns %d", __func__, ret);
 860
 861         if (ret == -1) {
 862                 /*
 863                  * if locks are not available (NFS for example),
 864                  * ignore the error
 865                  */
 866                 if (errno == ENOLCK
 867 #ifdef EOPNOTSUPP
 868                     || errno == EOPNOTSUPP
 869 #endif
 870 #ifdef ENOTSUP
 871                     || errno == ENOTSUP
 872 #endif
 873                    ) {
 874                         return TRUE;
 875                 }
 876
 877                 mono_w32error_set_last (ERROR_LOCK_VIOLATION);
 878                 return FALSE;
 879         }
 880
 881         return TRUE;
 882 }
 883
 884 static gboolean
 885 _wapi_unlock_file_region (gint fd, off_t offset, off_t length)
 886 {
 887         struct flock lock_data;
 888         gint ret;
 889
 890         lock_data.l_type = F_UNLCK;
 891         lock_data.l_whence = SEEK_SET;
 892         lock_data.l_start = offset;
 893         lock_data.l_len = length;
 894
 895         do {
 896                 ret = fcntl (fd, F_SETLK, &lock_data);
 897         } while(ret == -1 && errno == EINTR);
 898
 899         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fcntl returns %d", __func__, ret);
 900
 901         if (ret == -1) {
 902                 /*
 903                  * if locks are not available (NFS for example),
 904                  * ignore the error
 905                  */
 906                 if (errno == ENOLCK
 907 #ifdef EOPNOTSUPP
 908                     || errno == EOPNOTSUPP
 909 #endif
 910 #ifdef ENOTSUP
 911                     || errno == ENOTSUP
 912 #endif
 913                    ) {
 914                         return TRUE;
 915                 }
 916
 917                 mono_w32error_set_last (ERROR_LOCK_VIOLATION);
 918                 return FALSE;
 919         }
 920
 921         return TRUE;
 922 }
 923
 924 static gboolean lock_while_writing = FALSE;
 925
 926 /* Some utility functions.
 927  */
 928
 929 /*
 930  * Check if a file is writable by the current user.
 931  *
 932  * This is is a best effort kind of thing. It assumes a reasonable sane set
 933  * of permissions by the underlying OS.
 934  *
 935  * We generally assume that basic unix permission bits are authoritative. Which might not
 936  * be the case under systems with extended permissions systems (posix ACLs, SELinux, OSX/iOS sandboxing, etc)
 937  *
 938  * The choice of access as the fallback is due to the expected lower overhead compared to trying to open the file.
 939  *
 940  * The only expected problem with using access are for root, setuid or setgid programs as access is not consistent
 941  * under those situations. It's to be expected that this should not happen in practice as those bits are very dangerous
 942  * and should not be used with a dynamic runtime.
 943  */
 944 static gboolean
 945 is_file_writable (struct stat *st, const gchar *path)
 946 {
 947         gboolean ret;
 948         gchar *located_path;
 949
 950 #if __APPLE__
 951         // OS X Finder "locked" or `ls -lO` "uchg".
 952         // This only covers one of several cases where an OS X file could be unwritable through special flags.
 953         if (st->st_flags & (UF_IMMUTABLE|SF_IMMUTABLE))
 954                 return 0;
 955 #endif
 956
 957         /* Is it globally writable? */
 958         if (st->st_mode & S_IWOTH)
 959                 return 1;
 960
 961         /* Am I the owner? */
 962         if ((st->st_uid == geteuid ()) && (st->st_mode & S_IWUSR))
 963                 return 1;
 964
 965         /* Am I in the same group? */
 966         if ((st->st_gid == getegid ()) && (st->st_mode & S_IWGRP))
 967                 return 1;
 968
 969         located_path = mono_portability_find_file (path, FALSE);
 970
 971         /* Fallback to using access(2). It's not ideal as it might not take into consideration euid/egid
 972          * but it's the only sane option we have on unix.
 973          */
 974         MONO_ENTER_GC_SAFE;
 975         ret = access (located_path != NULL ? located_path : path, W_OK) == 0;
 976         MONO_EXIT_GC_SAFE;
 977
 978         g_free (located_path);
 979
 980         return ret;
 981 }
 982
 983
 984 static guint32 _wapi_stat_to_file_attributes (const gchar *pathname,
 985                                               struct stat *buf,
 986                                               struct stat *lbuf)
 987 {
 988         guint32 attrs = 0;
 989         gchar *filename;
 990
 991         /* FIXME: this could definitely be better, but there seems to
 992          * be no pattern to the attributes that are set
 993          */
 994
 995         /* Sockets (0140000) != Directory (040000) + Regular file (0100000) */
 996         if (S_ISSOCK (buf->st_mode))
 997                 buf->st_mode &= ~S_IFSOCK; /* don't consider socket protection */
 998
 999         filename = _wapi_basename (pathname);
1000
1001         if (S_ISDIR (buf->st_mode)) {
1002                 attrs = FILE_ATTRIBUTE_DIRECTORY;
1003                 if (!is_file_writable (buf, pathname)) {
1004                         attrs |= FILE_ATTRIBUTE_READONLY;
1005                 }
1006                 if (filename[0] == '.') {
1007                         attrs |= FILE_ATTRIBUTE_HIDDEN;
1008                 }
1009         } else {
1010                 if (!is_file_writable (buf, pathname)) {
1011                         attrs = FILE_ATTRIBUTE_READONLY;
1012
1013                         if (filename[0] == '.') {
1014                                 attrs |= FILE_ATTRIBUTE_HIDDEN;
1015                         }
1016                 } else if (filename[0] == '.') {
1017                         attrs = FILE_ATTRIBUTE_HIDDEN;
1018                 } else {
1019                         attrs = FILE_ATTRIBUTE_NORMAL;
1020                 }
1021         }
1022
1023         if (lbuf != NULL) {
1024                 if (S_ISLNK (lbuf->st_mode)) {
1025                         attrs |= FILE_ATTRIBUTE_REPARSE_POINT;
1026                 }
1027         }
1028
1029         g_free (filename);
1030
1031         return attrs;
1032 }
1033
1034 static void
1035 _wapi_set_last_error_from_errno (void)
1036 {
1037         mono_w32error_set_last (mono_w32error_unix_to_win32 (errno));
1038 }
1039
1040 static void _wapi_set_last_path_error_from_errno (const gchar *dir,
1041                                                   const gchar *path)
1042 {
1043         if (errno == ENOENT) {
1044                 /* Check the path - if it's a missing directory then
1045                  * we need to set PATH_NOT_FOUND not FILE_NOT_FOUND
1046                  */
1047                 gchar *dirname;
1048
1049
1050                 if (dir == NULL) {
1051                         dirname = _wapi_dirname (path);
1052                 } else {
1053                         dirname = g_strdup (dir);
1054                 }
1055
1056                 if (_wapi_access (dirname, F_OK) == 0) {
1057                         mono_w32error_set_last (ERROR_FILE_NOT_FOUND);
1058                 } else {
1059                         mono_w32error_set_last (ERROR_PATH_NOT_FOUND);
1060                 }
1061
1062                 g_free (dirname);
1063         } else {
1064                 _wapi_set_last_error_from_errno ();
1065         }
1066 }
1067
1068 static gboolean
1069 file_read(FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *bytesread)
1070 {
1071         gint ret;
1072         MonoThreadInfo *info = mono_thread_info_current ();
1073
1074         if(bytesread!=NULL) {
1075                 *bytesread=0;
1076         }
1077
1078         if(!(filehandle->fileaccess & (GENERIC_READ | GENERIC_ALL))) {
1079                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1080
1081                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1082                 return(FALSE);
1083         }
1084
1085         do {
1086                 MONO_ENTER_GC_SAFE;
1087                 ret = read (((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1088                 MONO_EXIT_GC_SAFE;
1089         } while (ret == -1 && errno == EINTR &&
1090                  !mono_thread_info_is_interrupt_state (info));
1091
1092         if(ret==-1) {
1093                 gint err = errno;
1094
1095                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: read of fd %d error: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(err));
1096                 mono_w32error_set_last (mono_w32error_unix_to_win32 (err));
1097                 return(FALSE);
1098         }
1099
1100         if (bytesread != NULL) {
1101                 *bytesread = ret;
1102         }
1103
1104         return(TRUE);
1105 }
1106
1107 static gboolean
1108 file_write (FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *byteswritten)
1109 {
1110         gint ret;
1111         off_t current_pos = 0;
1112         MonoThreadInfo *info = mono_thread_info_current ();
1113
1114         if(byteswritten!=NULL) {
1115                 *byteswritten=0;
1116         }
1117
1118         if(!(filehandle->fileaccess & GENERIC_WRITE) && !(filehandle->fileaccess & GENERIC_ALL)) {
1119                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1120
1121                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1122                 return(FALSE);
1123         }
1124
1125         if (lock_while_writing) {
1126                 /* Need to lock the region we're about to write to,
1127                  * because we only do advisory locking on POSIX
1128                  * systems
1129                  */
1130                 MONO_ENTER_GC_SAFE;
1131                 current_pos = lseek (((MonoFDHandle*) filehandle)->fd, (off_t)0, SEEK_CUR);
1132                 MONO_EXIT_GC_SAFE;
1133                 if (current_pos == -1) {
1134                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d lseek failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror (errno));
1135                         _wapi_set_last_error_from_errno ();
1136                         return(FALSE);
1137                 }
1138
1139                 if (_wapi_lock_file_region (((MonoFDHandle*) filehandle)->fd, current_pos, numbytes) == FALSE) {
1140                         /* The error has already been set */
1141                         return(FALSE);
1142                 }
1143         }
1144
1145         do {
1146                 MONO_ENTER_GC_SAFE;
1147                 ret = write (((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1148                 MONO_EXIT_GC_SAFE;
1149         } while (ret == -1 && errno == EINTR &&
1150                  !mono_thread_info_is_interrupt_state (info));
1151
1152         if (lock_while_writing) {
1153                 _wapi_unlock_file_region (((MonoFDHandle*) filehandle)->fd, current_pos, numbytes);
1154         }
1155
1156         if (ret == -1) {
1157                 if (errno == EINTR) {
1158                         ret = 0;
1159                 } else {
1160                         _wapi_set_last_error_from_errno ();
1161
1162                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: write of fd %d error: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1163
1164                         return(FALSE);
1165                 }
1166         }
1167         if (byteswritten != NULL) {
1168                 *byteswritten = ret;
1169         }
1170         return(TRUE);
1171 }
1172
1173 static gboolean file_flush(FileHandle *filehandle)
1174 {
1175         gint ret;
1176
1177         if(!(filehandle->fileaccess & (GENERIC_WRITE | GENERIC_ALL))) {
1178                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1179
1180                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1181                 return(FALSE);
1182         }
1183
1184         MONO_ENTER_GC_SAFE;
1185         ret=fsync(((MonoFDHandle*) filehandle)->fd);
1186         MONO_EXIT_GC_SAFE;
1187         if (ret==-1) {
1188                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fsync of fd %d error: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1189
1190                 _wapi_set_last_error_from_errno ();
1191                 return(FALSE);
1192         }
1193
1194         return(TRUE);
1195 }
1196
1197 static guint32 file_seek(FileHandle *filehandle, gint32 movedistance,
1198                          gint32 *highmovedistance, gint method)
1199 {
1200         gint64 offset, newpos;
1201         gint whence;
1202         guint32 ret;
1203
1204         if(!(filehandle->fileaccess & (GENERIC_READ | GENERIC_WRITE | GENERIC_ALL))) {
1205                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ or GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1206
1207                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1208                 return(INVALID_SET_FILE_POINTER);
1209         }
1210
1211         switch(method) {
1212         case FILE_BEGIN:
1213                 whence=SEEK_SET;
1214                 break;
1215         case FILE_CURRENT:
1216                 whence=SEEK_CUR;
1217                 break;
1218         case FILE_END:
1219                 whence=SEEK_END;
1220                 break;
1221         default:
1222                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: invalid seek type %d", __func__, method);
1223
1224                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
1225                 return(INVALID_SET_FILE_POINTER);
1226         }
1227
1228 #ifdef HAVE_LARGE_FILE_SUPPORT
1229         if(highmovedistance==NULL) {
1230                 offset=movedistance;
1231                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: setting offset to %" G_GINT64_FORMAT " (low %" G_GINT32_FORMAT ")", __func__,
1232                           offset, movedistance);
1233         } else {
1234                 offset=((gint64) *highmovedistance << 32) | (guint32)movedistance;
1235
1236                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: setting offset to %" G_GINT64_FORMAT " 0x%" PRIx64 " (high %" G_GINT32_FORMAT " 0x%" PRIx32 ", low %" G_GINT32_FORMAT " 0x%" PRIx32 ")",
1237                           __func__, offset, offset, *highmovedistance, *highmovedistance, movedistance, movedistance);
1238         }
1239 #else
1240         offset=movedistance;
1241 #endif
1242
1243         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: moving fd %d by %" G_GINT64_FORMAT " bytes from %d", __func__, ((MonoFDHandle*) filehandle)->fd, offset, whence);
1244
1245 #ifdef HOST_ANDROID
1246         /* bionic doesn't support -D_FILE_OFFSET_BITS=64 */
1247         MONO_ENTER_GC_SAFE;
1248         newpos=lseek64(((MonoFDHandle*) filehandle)->fd, offset, whence);
1249         MONO_EXIT_GC_SAFE;
1250 #else
1251         MONO_ENTER_GC_SAFE;
1252         newpos=lseek(((MonoFDHandle*) filehandle)->fd, offset, whence);
1253         MONO_EXIT_GC_SAFE;
1254 #endif
1255         if(newpos==-1) {
1256                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: lseek on fd %d returned error %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1257
1258                 _wapi_set_last_error_from_errno ();
1259                 return(INVALID_SET_FILE_POINTER);
1260         }
1261
1262         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: lseek returns %" G_GINT64_FORMAT, __func__, newpos);
1263
1264 #ifdef HAVE_LARGE_FILE_SUPPORT
1265         ret=newpos & 0xFFFFFFFF;
1266         if(highmovedistance!=NULL) {
1267                 *highmovedistance=newpos>>32;
1268         }
1269 #else
1270         ret=newpos;
1271         if(highmovedistance!=NULL) {
1272                 /* Accurate, but potentially dodgy :-) */
1273                 *highmovedistance=0;
1274         }
1275 #endif
1276
1277         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: move of fd %d returning %" G_GUINT32_FORMAT "/%" G_GINT32_FORMAT, __func__, ((MonoFDHandle*) filehandle)->fd, ret, highmovedistance==NULL?0:*highmovedistance);
1278
1279         return(ret);
1280 }
1281
1282 static gboolean file_setendoffile(FileHandle *filehandle)
1283 {
1284         struct stat statbuf;
1285         off_t pos;
1286         gint ret;
1287         MonoThreadInfo *info = mono_thread_info_current ();
1288
1289         if(!(filehandle->fileaccess & (GENERIC_WRITE | GENERIC_ALL))) {
1290                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1291
1292                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1293                 return(FALSE);
1294         }
1295
1296         /* Find the current file position, and the file length.  If
1297          * the file position is greater than the length, write to
1298          * extend the file with a hole.  If the file position is less
1299          * than the length, truncate the file.
1300          */
1301
1302         MONO_ENTER_GC_SAFE;
1303         ret=fstat(((MonoFDHandle*) filehandle)->fd, &statbuf);
1304         MONO_EXIT_GC_SAFE;
1305         if(ret==-1) {
1306                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d fstat failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1307
1308                 _wapi_set_last_error_from_errno ();
1309                 return(FALSE);
1310         }
1311
1312         MONO_ENTER_GC_SAFE;
1313         pos=lseek(((MonoFDHandle*) filehandle)->fd, (off_t)0, SEEK_CUR);
1314         MONO_EXIT_GC_SAFE;
1315         if(pos==-1) {
1316                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d lseek failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1317
1318                 _wapi_set_last_error_from_errno ();
1319                 return(FALSE);
1320         }
1321
1322 #ifdef FTRUNCATE_DOESNT_EXTEND
1323         off_t size = statbuf.st_size;
1324         /* I haven't bothered to write the configure.ac stuff for this
1325          * because I don't know if any platform needs it.  I'm leaving
1326          * this code just in case though
1327          */
1328         if(pos>size) {
1329                 /* Extend the file.  Use write() here, because some
1330                  * manuals say that ftruncate() behaviour is undefined
1331                  * when the file needs extending.  The POSIX spec says
1332                  * that on XSI-conformant systems it extends, so if
1333                  * every system we care about conforms, then we can
1334                  * drop this write.
1335                  */
1336                 do {
1337                         MONO_ENTER_GC_SAFE;
1338                         ret = write (((MonoFDHandle*) filehandle)->fd, "", 1);
1339                         MONO_EXIT_GC_SAFE;
1340                 } while (ret == -1 && errno == EINTR &&
1341                          !mono_thread_info_is_interrupt_state (info));
1342
1343                 if(ret==-1) {
1344                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d extend write failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1345
1346                         _wapi_set_last_error_from_errno ();
1347                         return(FALSE);
1348                 }
1349
1350                 /* And put the file position back after the write */
1351                 MONO_ENTER_GC_SAFE;
1352                 ret = lseek (((MonoFDHandle*) filehandle)->fd, pos, SEEK_SET);
1353                 MONO_EXIT_GC_SAFE;
1354                 if (ret == -1) {
1355                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d second lseek failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1356
1357                         _wapi_set_last_error_from_errno ();
1358                         return(FALSE);
1359                 }
1360         }
1361 #endif
1362
1363         /* always truncate, because the extend write() adds an extra
1364          * byte to the end of the file
1365          */
1366         do {
1367                 MONO_ENTER_GC_SAFE;
1368                 ret=ftruncate(((MonoFDHandle*) filehandle)->fd, pos);
1369                 MONO_EXIT_GC_SAFE;
1370         }
1371         while (ret==-1 && errno==EINTR && !mono_thread_info_is_interrupt_state (info));
1372         if(ret==-1) {
1373                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d ftruncate failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1374
1375                 _wapi_set_last_error_from_errno ();
1376                 return(FALSE);
1377         }
1378
1379         return(TRUE);
1380 }
1381
1382 static guint32 file_getfilesize(FileHandle *filehandle, guint32 *highsize)
1383 {
1384         struct stat statbuf;
1385         guint32 size;
1386         gint ret;
1387
1388         if(!(filehandle->fileaccess & (GENERIC_READ | GENERIC_WRITE | GENERIC_ALL))) {
1389                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ or GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1390
1391                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1392                 return(INVALID_FILE_SIZE);
1393         }
1394
1395         /* If the file has a size with the low bits 0xFFFFFFFF the
1396          * caller can't tell if this is an error, so clear the error
1397          * value
1398          */
1399         mono_w32error_set_last (ERROR_SUCCESS);
1400
1401         MONO_ENTER_GC_SAFE;
1402         ret = fstat(((MonoFDHandle*) filehandle)->fd, &statbuf);
1403         MONO_EXIT_GC_SAFE;
1404         if (ret == -1) {
1405                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d fstat failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1406
1407                 _wapi_set_last_error_from_errno ();
1408                 return(INVALID_FILE_SIZE);
1409         }
1410
1411         /* fstat indicates block devices as zero-length, so go a different path */
1412 #ifdef BLKGETSIZE64
1413         if (S_ISBLK(statbuf.st_mode)) {
1414                 guint64 bigsize;
1415                 gint res;
1416                 MONO_ENTER_GC_SAFE;
1417                 res = ioctl (((MonoFDHandle*) filehandle)->fd, BLKGETSIZE64, &bigsize);
1418                 MONO_EXIT_GC_SAFE;
1419                 if (res < 0) {
1420                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d ioctl BLKGETSIZE64 failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1421
1422                         _wapi_set_last_error_from_errno ();
1423                         return(INVALID_FILE_SIZE);
1424                 }
1425
1426                 size = bigsize & 0xFFFFFFFF;
1427                 if (highsize != NULL) {
1428                         *highsize = bigsize>>32;
1429                 }
1430
1431                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Returning block device size %" G_GUINT32_FORMAT "/%" G_GUINT32_FORMAT,
1432                            __func__, size, *highsize);
1433
1434                 return(size);
1435         }
1436 #endif
1437
1438 #ifdef HAVE_LARGE_FILE_SUPPORT
1439         size = statbuf.st_size & 0xFFFFFFFF;
1440         if (highsize != NULL) {
1441                 *highsize = statbuf.st_size>>32;
1442         }
1443 #else
1444         if (highsize != NULL) {
1445                 /* Accurate, but potentially dodgy :-) */
1446                 *highsize = 0;
1447         }
1448         size = statbuf.st_size;
1449 #endif
1450
1451         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Returning size %" G_GUINT32_FORMAT "/%" G_GUINT32_FORMAT, __func__, size, *highsize);
1452
1453         return(size);
1454 }
1455
1456 static guint64
1457 convert_unix_filetime_ms (const FILETIME *file_time, const char *ttype)
1458 {
1459         guint64 t = ((guint64) file_time->dwHighDateTime << 32) + file_time->dwLowDateTime;
1460
1461         /* This is (time_t)0.  We can actually go to INT_MIN,
1462          * but this will do for now.
1463          */
1464         if (t < CONVERT_BASE) {
1465                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: attempt to set %s time too early", __func__, ttype);
1466                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
1467                 return (FALSE);
1468         }
1469
1470         return t - CONVERT_BASE;
1471 }
1472
1473 #ifndef HAVE_STRUCT_TIMEVAL
1474 static guint64
1475 convert_unix_filetime (const FILETIME *file_time, size_t field_size, const char *ttype)
1476 {
1477         guint64 t = convert_unix_filetime_ms (file_time, ttype);
1478
1479         if (field_size == 4 && (t / 10000000) > INT_MAX) {
1480                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: attempt to set %s time that is too big for a 32bits time_t", __func__, ttype);
1481                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
1482                 return (FALSE);
1483         }
1484
1485         return t / 10000000;
1486 }
1487 #endif
1488
1489 static void convert_stattime_access_to_timeval (struct timeval *dest, struct stat *statbuf)
1490 {
1491 #if HAVE_STRUCT_STAT_ST_ATIMESPEC
1492         dest->tv_sec = statbuf->st_atimespec.tv_sec;
1493         dest->tv_usec = statbuf->st_atimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND;
1494 #else
1495         dest->tv_sec = statbuf->st_atime;
1496 #if HAVE_STRUCT_STAT_ST_ATIM
1497         dest->tv_usec = statbuf->st_atim.tv_nsec / NANOSECONDS_PER_MICROSECOND;
1498 #endif
1499 #endif
1500 }
1501
1502 static void convert_stattime_mod_to_timeval (struct timeval *dest, struct stat *statbuf)
1503 {
1504 #if HAVE_STRUCT_STAT_ST_ATIMESPEC
1505         dest->tv_sec = statbuf->st_mtimespec.tv_sec;
1506         dest->tv_usec = statbuf->st_mtimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND;
1507 #else
1508         dest->tv_sec = statbuf->st_mtime;
1509 #if HAVE_STRUCT_STAT_ST_ATIM
1510         dest->tv_usec = statbuf->st_mtim.tv_nsec / NANOSECONDS_PER_MICROSECOND;
1511 #endif
1512 #endif
1513 }
1514
1515 static gboolean file_setfiletime(FileHandle *filehandle,
1516                                  const FILETIME *create_time G_GNUC_UNUSED,
1517                                  const FILETIME *access_time,
1518                                  const FILETIME *write_time)
1519 {
1520         struct stat statbuf;
1521         gint ret;
1522
1523         if(!(filehandle->fileaccess & (GENERIC_WRITE | GENERIC_ALL))) {
1524                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1525
1526                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1527                 return(FALSE);
1528         }
1529
1530         if(filehandle->filename == NULL) {
1531                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d unknown filename", __func__, ((MonoFDHandle*) filehandle)->fd);
1532
1533                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
1534                 return(FALSE);
1535         }
1536
1537         /* Get the current times, so we can put the same times back in
1538          * the event that one of the FileTime structs is NULL
1539          */
1540         MONO_ENTER_GC_SAFE;
1541         ret=fstat (((MonoFDHandle*) filehandle)->fd, &statbuf);
1542         MONO_EXIT_GC_SAFE;
1543         if(ret==-1) {
1544                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d fstat failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1545
1546                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
1547                 return(FALSE);
1548         }
1549
1550 #ifdef HAVE_STRUCT_TIMEVAL
1551         struct timeval times [2];
1552         memset (times, 0, sizeof (times));
1553
1554         if (access_time) {
1555                 guint64 actime = convert_unix_filetime_ms (access_time, "access");
1556                 times [0].tv_sec = actime / TICKS_PER_SECOND;
1557                 times [0].tv_usec = (actime % TICKS_PER_SECOND) / TICKS_PER_MICROSECOND;
1558         } else {
1559                 convert_stattime_access_to_timeval (&times [0], &statbuf);
1560         }
1561
1562         if (write_time) {
1563                 guint64 wtime = convert_unix_filetime_ms (write_time, "write");
1564                 times [1].tv_sec = wtime / TICKS_PER_SECOND;
1565                 times [1].tv_usec = (wtime % TICKS_PER_SECOND) / TICKS_PER_MICROSECOND;
1566         } else {
1567                 convert_stattime_mod_to_timeval (&times [1], &statbuf);
1568         }
1569
1570         ret = _wapi_utimes (filehandle->filename, times);
1571 #else
1572         struct utimbuf utbuf;
1573         utbuf.actime  = access_time ? convert_unix_filetime (access_time, sizeof (utbuf.actime), "access") : statbuf.st_atime;
1574         utbuf.modtime = write_time  ? convert_unix_filetime (write_time,  sizeof (utbuf.modtime), "write") : statbuf.st_mtime;
1575
1576         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: setting fd %d access %ld write %ld", __func__, ((MonoFDHandle*) filehandle)->fd, utbuf.actime, utbuf.modtime);
1577
1578         ret = _wapi_utime (filehandle->filename, &utbuf);
1579 #endif
1580         if (ret == -1) {
1581                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d [%s] utime failed: %s", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->filename, g_strerror(errno));
1582
1583                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
1584                 return(FALSE);
1585         }
1586
1587         return(TRUE);
1588 }
1589
1590 static gboolean
1591 console_read(FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *bytesread)
1592 {
1593         gint ret;
1594         MonoThreadInfo *info = mono_thread_info_current ();
1595
1596         if(bytesread!=NULL) {
1597                 *bytesread=0;
1598         }
1599
1600         if(!(filehandle->fileaccess & (GENERIC_READ | GENERIC_ALL))) {
1601                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1602
1603                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1604                 return(FALSE);
1605         }
1606
1607         do {
1608                 MONO_ENTER_GC_SAFE;
1609                 ret=read(((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1610                 MONO_EXIT_GC_SAFE;
1611         } while (ret==-1 && errno==EINTR && !mono_thread_info_is_interrupt_state (info));
1612
1613         if(ret==-1) {
1614                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: read of fd %d error: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1615
1616                 _wapi_set_last_error_from_errno ();
1617                 return(FALSE);
1618         }
1619
1620         if(bytesread!=NULL) {
1621                 *bytesread=ret;
1622         }
1623
1624         return(TRUE);
1625 }
1626
1627 static gboolean
1628 console_write (FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *byteswritten)
1629 {
1630         gint ret;
1631         MonoThreadInfo *info = mono_thread_info_current ();
1632
1633         if(byteswritten!=NULL) {
1634                 *byteswritten=0;
1635         }
1636
1637         if(!(filehandle->fileaccess & (GENERIC_WRITE | GENERIC_ALL))) {
1638                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1639
1640                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1641                 return(FALSE);
1642         }
1643
1644         do {
1645                 MONO_ENTER_GC_SAFE;
1646                 ret = write(((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1647                 MONO_EXIT_GC_SAFE;
1648         } while (ret == -1 && errno == EINTR &&
1649                  !mono_thread_info_is_interrupt_state (info));
1650
1651         if (ret == -1) {
1652                 if (errno == EINTR) {
1653                         ret = 0;
1654                 } else {
1655                         _wapi_set_last_error_from_errno ();
1656
1657                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: write of fd %d error: %s", __func__, ((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1658
1659                         return(FALSE);
1660                 }
1661         }
1662         if(byteswritten!=NULL) {
1663                 *byteswritten=ret;
1664         }
1665
1666         return(TRUE);
1667 }
1668
1669 static gboolean
1670 pipe_read (FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *bytesread)
1671 {
1672         gint ret;
1673         MonoThreadInfo *info = mono_thread_info_current ();
1674
1675         if(bytesread!=NULL) {
1676                 *bytesread=0;
1677         }
1678
1679         if(!(filehandle->fileaccess & (GENERIC_READ | GENERIC_ALL))) {
1680                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1681
1682                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1683                 return(FALSE);
1684         }
1685
1686         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: reading up to %" G_GUINT32_FORMAT " bytes from pipe %d", __func__, numbytes, ((MonoFDHandle*) filehandle)->fd);
1687
1688         do {
1689                 MONO_ENTER_GC_SAFE;
1690                 ret=read(((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1691                 MONO_EXIT_GC_SAFE;
1692         } while (ret==-1 && errno==EINTR && !mono_thread_info_is_interrupt_state (info));
1693
1694         if (ret == -1) {
1695                 if (errno == EINTR) {
1696                         ret = 0;
1697                 } else {
1698                         _wapi_set_last_error_from_errno ();
1699
1700                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: read of fd %d error: %s", __func__,((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1701
1702                         return(FALSE);
1703                 }
1704         }
1705
1706         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: read %d bytes from pipe %d", __func__, ret, ((MonoFDHandle*) filehandle)->fd);
1707
1708         if(bytesread!=NULL) {
1709                 *bytesread=ret;
1710         }
1711
1712         return(TRUE);
1713 }
1714
1715 static gboolean
1716 pipe_write (FileHandle *filehandle, gpointer buffer, guint32 numbytes, guint32 *byteswritten)
1717 {
1718         gint ret;
1719         MonoThreadInfo *info = mono_thread_info_current ();
1720
1721         if(byteswritten!=NULL) {
1722                 *byteswritten=0;
1723         }
1724
1725         if(!(filehandle->fileaccess & (GENERIC_WRITE | GENERIC_ALL))) {
1726                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
1727
1728                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
1729                 return(FALSE);
1730         }
1731
1732         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: writing up to %" G_GUINT32_FORMAT " bytes to pipe %d", __func__, numbytes, ((MonoFDHandle*) filehandle)->fd);
1733
1734         do {
1735                 MONO_ENTER_GC_SAFE;
1736                 ret = write (((MonoFDHandle*) filehandle)->fd, buffer, numbytes);
1737                 MONO_EXIT_GC_SAFE;
1738         } while (ret == -1 && errno == EINTR &&
1739                  !mono_thread_info_is_interrupt_state (info));
1740
1741         if (ret == -1) {
1742                 if (errno == EINTR) {
1743                         ret = 0;
1744                 } else {
1745                         _wapi_set_last_error_from_errno ();
1746
1747                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: write of fd %d error: %s", __func__,((MonoFDHandle*) filehandle)->fd, g_strerror(errno));
1748
1749                         return(FALSE);
1750                 }
1751         }
1752         if(byteswritten!=NULL) {
1753                 *byteswritten=ret;
1754         }
1755
1756         return(TRUE);
1757 }
1758
1759 static gint convert_flags(guint32 fileaccess, guint32 createmode)
1760 {
1761         gint flags=0;
1762
1763         switch(fileaccess) {
1764         case GENERIC_READ:
1765                 flags=O_RDONLY;
1766                 break;
1767         case GENERIC_WRITE:
1768                 flags=O_WRONLY;
1769                 break;
1770         case GENERIC_READ|GENERIC_WRITE:
1771                 flags=O_RDWR;
1772                 break;
1773         default:
1774                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Unknown access type 0x%" PRIx32, __func__,
1775                           fileaccess);
1776                 break;
1777         }
1778
1779         switch(createmode) {
1780         case CREATE_NEW:
1781                 flags|=O_CREAT|O_EXCL;
1782                 break;
1783         case CREATE_ALWAYS:
1784                 flags|=O_CREAT|O_TRUNC;
1785                 break;
1786         case OPEN_EXISTING:
1787                 break;
1788         case OPEN_ALWAYS:
1789                 flags|=O_CREAT;
1790                 break;
1791         case TRUNCATE_EXISTING:
1792                 flags|=O_TRUNC;
1793                 break;
1794         default:
1795                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Unknown create mode 0x%" PRIx32, __func__,
1796                           createmode);
1797                 break;
1798         }
1799
1800         return(flags);
1801 }
1802
1803 #if 0 /* unused */
1804 static mode_t convert_perms(guint32 sharemode)
1805 {
1806         mode_t perms=0600;
1807
1808         if(sharemode&FILE_SHARE_READ) {
1809                 perms|=044;
1810         }
1811         if(sharemode&FILE_SHARE_WRITE) {
1812                 perms|=022;
1813         }
1814
1815         return(perms);
1816 }
1817 #endif
1818
1819 static gboolean share_allows_open (struct stat *statbuf, guint32 sharemode,
1820                                    guint32 fileaccess,
1821                                    FileShare **share_info)
1822 {
1823         gboolean file_already_shared;
1824         guint32 file_existing_share, file_existing_access;
1825
1826         file_already_shared = file_share_get (statbuf->st_dev, statbuf->st_ino, sharemode, fileaccess, &file_existing_share, &file_existing_access, share_info);
1827
1828         if (file_already_shared) {
1829                 /* The reference to this share info was incremented
1830                  * when we looked it up, so be careful to put it back
1831                  * if we conclude we can't use this file.
1832                  */
1833                 if (file_existing_share == 0) {
1834                         /* Quick and easy, no possibility to share */
1835                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Share mode prevents open: requested access: 0x%" PRIx32 ", file has sharing = NONE", __func__, fileaccess);
1836
1837                         file_share_release (*share_info);
1838                         *share_info = NULL;
1839
1840                         return(FALSE);
1841                 }
1842
1843                 if (((file_existing_share == FILE_SHARE_READ) &&
1844                      (fileaccess != GENERIC_READ)) ||
1845                     ((file_existing_share == FILE_SHARE_WRITE) &&
1846                      (fileaccess != GENERIC_WRITE))) {
1847                         /* New access mode doesn't match up */
1848                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Share mode prevents open: requested access: 0x%" PRIx32 ", file has sharing: 0x%" PRIx32, __func__, fileaccess, file_existing_share);
1849
1850                         file_share_release (*share_info);
1851                         *share_info = NULL;
1852
1853                         return(FALSE);
1854                 }
1855
1856                 if (((file_existing_access & GENERIC_READ) &&
1857                      !(sharemode & FILE_SHARE_READ)) ||
1858                     ((file_existing_access & GENERIC_WRITE) &&
1859                      !(sharemode & FILE_SHARE_WRITE))) {
1860                         /* New share mode doesn't match up */
1861                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Access mode prevents open: requested share: 0x%" PRIx32 ", file has access: 0x%" PRIx32, __func__, sharemode, file_existing_access);
1862
1863                         file_share_release (*share_info);
1864                         *share_info = NULL;
1865
1866                         return(FALSE);
1867                 }
1868         } else {
1869                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: New file!", __func__);
1870         }
1871
1872         return(TRUE);
1873 }
1874
1875
1876 static gboolean
1877 share_allows_delete (struct stat *statbuf, FileShare **share_info)
1878 {
1879         gboolean file_already_shared;
1880         guint32 file_existing_share, file_existing_access;
1881
1882         file_already_shared = file_share_get (statbuf->st_dev, statbuf->st_ino, FILE_SHARE_DELETE, GENERIC_READ, &file_existing_share, &file_existing_access, share_info);
1883
1884         if (file_already_shared) {
1885                 /* The reference to this share info was incremented
1886                  * when we looked it up, so be careful to put it back
1887                  * if we conclude we can't use this file.
1888                  */
1889                 if (file_existing_share == 0) {
1890                         /* Quick and easy, no possibility to share */
1891                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Share mode prevents open: requested access: 0x%" PRIx32 ", file has sharing = NONE", __func__, (*share_info)->access);
1892
1893                         file_share_release (*share_info);
1894                         *share_info = NULL;
1895
1896                         return(FALSE);
1897                 }
1898
1899                 if (!(file_existing_share & FILE_SHARE_DELETE)) {
1900                         /* New access mode doesn't match up */
1901                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Share mode prevents open: requested access: 0x%" PRIx32 ", file has sharing: 0x%" PRIx32, __func__, (*share_info)->access, file_existing_share);
1902
1903                         file_share_release (*share_info);
1904                         *share_info = NULL;
1905
1906                         return(FALSE);
1907                 }
1908         } else {
1909                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: New file!", __func__);
1910         }
1911
1912         return(TRUE);
1913 }
1914
1915 gpointer
1916 mono_w32file_create(const gunichar2 *name, guint32 fileaccess, guint32 sharemode, guint32 createmode, guint32 attrs)
1917 {
1918         FileHandle *filehandle;
1919         MonoFDType type;
1920         gint flags=convert_flags(fileaccess, createmode);
1921         /*mode_t perms=convert_perms(sharemode);*/
1922         /* we don't use sharemode, because that relates to sharing of
1923          * the file when the file is open and is already handled by
1924          * other code, perms instead are the on-disk permissions and
1925          * this is a sane default.
1926          */
1927         mode_t perms=0666;
1928         gchar *filename;
1929         gint fd, ret;
1930         struct stat statbuf;
1931
1932         if (attrs & FILE_ATTRIBUTE_TEMPORARY)
1933                 perms = 0600;
1934
1935         if (attrs & FILE_ATTRIBUTE_ENCRYPTED){
1936                 mono_w32error_set_last (ERROR_ENCRYPTION_FAILED);
1937                 return INVALID_HANDLE_VALUE;
1938         }
1939
1940         if (name == NULL) {
1941                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
1942
1943                 mono_w32error_set_last (ERROR_INVALID_NAME);
1944                 return(INVALID_HANDLE_VALUE);
1945         }
1946
1947         filename = mono_unicode_to_external (name);
1948         if (filename == NULL) {
1949                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
1950
1951                 mono_w32error_set_last (ERROR_INVALID_NAME);
1952                 return(INVALID_HANDLE_VALUE);
1953         }
1954
1955         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Opening %s with share 0x%" PRIx32 " and access 0x%" PRIx32, __func__,
1956                    filename, sharemode, fileaccess);
1957
1958         fd = _wapi_open (filename, flags, perms);
1959
1960         /* If we were trying to open a directory with write permissions
1961          * (e.g. O_WRONLY or O_RDWR), this call will fail with
1962          * EISDIR. However, this is a bit bogus because calls to
1963          * manipulate the directory (e.g. mono_w32file_set_times) will still work on
1964          * the directory because they use other API calls
1965          * (e.g. utime()). Hence, if we failed with the EISDIR error, try
1966          * to open the directory again without write permission.
1967          */
1968         if (fd == -1 && errno == EISDIR)
1969         {
1970                 /* Try again but don't try to make it writable */
1971                 fd = _wapi_open (filename, flags & ~(O_RDWR|O_WRONLY), perms);
1972         }
1973
1974         if (fd == -1) {
1975                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Error opening file %s: %s", __func__, filename, g_strerror(errno));
1976                 _wapi_set_last_path_error_from_errno (NULL, filename);
1977                 g_free (filename);
1978
1979                 return(INVALID_HANDLE_VALUE);
1980         }
1981
1982         MONO_ENTER_GC_SAFE;
1983         ret = fstat (fd, &statbuf);
1984         MONO_EXIT_GC_SAFE;
1985         if (ret == -1) {
1986                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fstat error of file %s: %s", __func__, filename, g_strerror (errno));
1987                 _wapi_set_last_error_from_errno ();
1988                 MONO_ENTER_GC_SAFE;
1989                 close (fd);
1990                 MONO_EXIT_GC_SAFE;
1991
1992                 return(INVALID_HANDLE_VALUE);
1993         }
1994
1995 #ifndef S_ISFIFO
1996 #define S_ISFIFO(m) ((m & S_IFIFO) != 0)
1997 #endif
1998         if (S_ISFIFO (statbuf.st_mode)) {
1999                 type = MONO_FDTYPE_PIPE;
2000                 /* maintain invariant that pipes have no filename */
2001                 g_free (filename);
2002                 filename = NULL;
2003         } else if (S_ISCHR (statbuf.st_mode)) {
2004                 type = MONO_FDTYPE_CONSOLE;
2005         } else {
2006                 type = MONO_FDTYPE_FILE;
2007         }
2008
2009         filehandle = file_data_create (type, fd);
2010         filehandle->filename = filename;
2011         filehandle->fileaccess = fileaccess;
2012         filehandle->sharemode = sharemode;
2013         filehandle->attrs = attrs;
2014
2015         if (!share_allows_open (&statbuf, filehandle->sharemode, filehandle->fileaccess, &filehandle->share_info)) {
2016                 mono_w32error_set_last (ERROR_SHARING_VIOLATION);
2017                 MONO_ENTER_GC_SAFE;
2018                 close (((MonoFDHandle*) filehandle)->fd);
2019                 MONO_EXIT_GC_SAFE;
2020
2021                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2022                 return (INVALID_HANDLE_VALUE);
2023         }
2024         if (!filehandle->share_info) {
2025                 /* No space, so no more files can be opened */
2026                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: No space in the share table", __func__);
2027
2028                 mono_w32error_set_last (ERROR_TOO_MANY_OPEN_FILES);
2029                 MONO_ENTER_GC_SAFE;
2030                 close (((MonoFDHandle*) filehandle)->fd);
2031                 MONO_EXIT_GC_SAFE;
2032
2033                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2034                 return(INVALID_HANDLE_VALUE);
2035         }
2036
2037 #ifdef HAVE_POSIX_FADVISE
2038         if (attrs & FILE_FLAG_SEQUENTIAL_SCAN) {
2039                 MONO_ENTER_GC_SAFE;
2040                 posix_fadvise (((MonoFDHandle*) filehandle)->fd, 0, 0, POSIX_FADV_SEQUENTIAL);
2041                 MONO_EXIT_GC_SAFE;
2042         }
2043         if (attrs & FILE_FLAG_RANDOM_ACCESS) {
2044                 MONO_ENTER_GC_SAFE;
2045                 posix_fadvise (((MonoFDHandle*) filehandle)->fd, 0, 0, POSIX_FADV_RANDOM);
2046                 MONO_EXIT_GC_SAFE;
2047         }
2048 #endif
2049
2050 #ifdef F_RDAHEAD
2051         if (attrs & FILE_FLAG_SEQUENTIAL_SCAN) {
2052                 MONO_ENTER_GC_SAFE;
2053                 fcntl(((MonoFDHandle*) filehandle)->fd, F_RDAHEAD, 1);
2054                 MONO_EXIT_GC_SAFE;
2055         }
2056 #endif
2057
2058         mono_fdhandle_insert ((MonoFDHandle*) filehandle);
2059
2060         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: returning handle %p", __func__, GINT_TO_POINTER(((MonoFDHandle*) filehandle)->fd));
2061
2062         return GINT_TO_POINTER(((MonoFDHandle*) filehandle)->fd);
2063 }
2064
2065 gboolean
2066 mono_w32file_close (gpointer handle)
2067 {
2068         if (!mono_fdhandle_close (GPOINTER_TO_INT (handle))) {
2069                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2070                 return FALSE;
2071         }
2072
2073         return TRUE;
2074 }
2075
2076 gboolean mono_w32file_delete(const gunichar2 *name)
2077 {
2078         gchar *filename;
2079         gint retval;
2080         gboolean ret = FALSE;
2081 #if 0
2082         struct stat statbuf;
2083         FileShare *shareinfo;
2084 #endif
2085
2086         if(name==NULL) {
2087                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
2088
2089                 mono_w32error_set_last (ERROR_INVALID_NAME);
2090                 return(FALSE);
2091         }
2092
2093         filename=mono_unicode_to_external(name);
2094         if(filename==NULL) {
2095                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
2096
2097                 mono_w32error_set_last (ERROR_INVALID_NAME);
2098                 return(FALSE);
2099         }
2100
2101 #if 0
2102         /* Check to make sure sharing allows us to open the file for
2103          * writing.  See bug 323389.
2104          *
2105          * Do the checks that don't need an open file descriptor, for
2106          * simplicity's sake.  If we really have to do the full checks
2107          * then we can implement that later.
2108          */
2109         if (_wapi_stat (filename, &statbuf) < 0) {
2110                 _wapi_set_last_path_error_from_errno (NULL, filename);
2111                 g_free (filename);
2112                 return(FALSE);
2113         }
2114
2115         if (share_allows_open (&statbuf, 0, GENERIC_WRITE,
2116                                &shareinfo) == FALSE) {
2117                 mono_w32error_set_last (ERROR_SHARING_VIOLATION);
2118                 g_free (filename);
2119                 return FALSE;
2120         }
2121         if (shareinfo)
2122                 file_share_release (shareinfo);
2123 #endif
2124
2125         retval = _wapi_unlink (filename);
2126
2127         if (retval == -1) {
2128                 /* On linux, calling unlink on an non-existing file in a read-only mount will fail with EROFS.
2129                  * The expected behavior is for this function to return FALSE and not trigger an exception.
2130                  * To work around this behavior, we stat the file on failure.
2131                  *
2132                  * This was supposedly fixed on kernel 3.0 [1] but we could reproduce it with Ubuntu 16.04 which has kernel 4.4.
2133                  * We can't remove this workaround until the early 2020's when most Android deviced will have a fix.
2134                  * [1] https://github.com/torvalds/linux/commit/50338b889dc504c69e0cb316ac92d1b9e51f3c8a
2135                  */
2136                 if (errno == EROFS) {
2137                         MonoIOStat stat;
2138                         if (mono_w32file_get_attributes_ex (name, &stat)) //The file exists, so must be due the RO file system
2139                                 errno = EROFS;
2140                 }
2141                 _wapi_set_last_path_error_from_errno (NULL, filename);
2142         } else {
2143                 ret = TRUE;
2144         }
2145
2146         g_free(filename);
2147
2148         return(ret);
2149 }
2150
2151 static gboolean
2152 MoveFile (const gunichar2 *name, const gunichar2 *dest_name)
2153 {
2154         gchar *utf8_name, *utf8_dest_name;
2155         gint result, errno_copy;
2156         struct stat stat_src, stat_dest;
2157         gboolean ret = FALSE;
2158         FileShare *shareinfo;
2159
2160         if(name==NULL) {
2161                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
2162
2163                 mono_w32error_set_last (ERROR_INVALID_NAME);
2164                 return(FALSE);
2165         }
2166
2167         utf8_name = mono_unicode_to_external (name);
2168         if (utf8_name == NULL) {
2169                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
2170
2171                 mono_w32error_set_last (ERROR_INVALID_NAME);
2172                 return FALSE;
2173         }
2174
2175         if(dest_name==NULL) {
2176                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
2177
2178                 g_free (utf8_name);
2179                 mono_w32error_set_last (ERROR_INVALID_NAME);
2180                 return(FALSE);
2181         }
2182
2183         utf8_dest_name = mono_unicode_to_external (dest_name);
2184         if (utf8_dest_name == NULL) {
2185                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
2186
2187                 g_free (utf8_name);
2188                 mono_w32error_set_last (ERROR_INVALID_NAME);
2189                 return FALSE;
2190         }
2191
2192         /*
2193          * In C# land we check for the existence of src, but not for dest.
2194          * We check it here and return the failure if dest exists and is not
2195          * the same file as src.
2196          */
2197         if (_wapi_stat (utf8_name, &stat_src) < 0) {
2198                 if (errno != ENOENT || _wapi_lstat (utf8_name, &stat_src) < 0) {
2199                         _wapi_set_last_path_error_from_errno (NULL, utf8_name);
2200                         g_free (utf8_name);
2201                         g_free (utf8_dest_name);
2202                         return FALSE;
2203                 }
2204         }
2205
2206         if (!_wapi_stat (utf8_dest_name, &stat_dest)) {
2207                 if (stat_dest.st_dev != stat_src.st_dev ||
2208                     stat_dest.st_ino != stat_src.st_ino) {
2209                         g_free (utf8_name);
2210                         g_free (utf8_dest_name);
2211                         mono_w32error_set_last (ERROR_ALREADY_EXISTS);
2212                         return FALSE;
2213                 }
2214         }
2215
2216         /* Check to make that we have delete sharing permission.
2217          * See https://bugzilla.xamarin.com/show_bug.cgi?id=17009
2218          *
2219          * Do the checks that don't need an open file descriptor, for
2220          * simplicity's sake.  If we really have to do the full checks
2221          * then we can implement that later.
2222          */
2223         if (share_allows_delete (&stat_src, &shareinfo) == FALSE) {
2224                 mono_w32error_set_last (ERROR_SHARING_VIOLATION);
2225                 return FALSE;
2226         }
2227         if (shareinfo) {
2228                 file_share_release (shareinfo);
2229                 shareinfo = NULL;
2230         }
2231
2232         result = _wapi_rename (utf8_name, utf8_dest_name);
2233         errno_copy = errno;
2234
2235         if (result == -1) {
2236                 switch(errno_copy) {
2237                 case EEXIST:
2238                         mono_w32error_set_last (ERROR_ALREADY_EXISTS);
2239                         break;
2240
2241                 case EXDEV:
2242                         /* Ignore here, it is dealt with below */
2243                         break;
2244
2245                 case ENOENT:
2246                         /* We already know src exists. Must be dest that doesn't exist. */
2247                         _wapi_set_last_path_error_from_errno (NULL, utf8_dest_name);
2248                         break;
2249
2250                 default:
2251                         _wapi_set_last_error_from_errno ();
2252                 }
2253         }
2254
2255         g_free (utf8_name);
2256         g_free (utf8_dest_name);
2257
2258         if (result != 0 && errno_copy == EXDEV) {
2259                 gint32 copy_error;
2260
2261                 if (S_ISDIR (stat_src.st_mode)) {
2262                         mono_w32error_set_last (ERROR_NOT_SAME_DEVICE);
2263                         return FALSE;
2264                 }
2265                 /* Try a copy to the new location, and delete the source */
2266                 if (!mono_w32file_copy (name, dest_name, FALSE, &copy_error)) {
2267                         /* mono_w32file_copy will set the error */
2268                         return(FALSE);
2269                 }
2270
2271                 return(mono_w32file_delete (name));
2272         }
2273
2274         if (result == 0) {
2275                 ret = TRUE;
2276         }
2277
2278         return(ret);
2279 }
2280
2281 static gboolean
2282 write_file (gint src_fd, gint dest_fd, struct stat *st_src, gboolean report_errors)
2283 {
2284         gint remain, n;
2285         gchar *buf, *wbuf;
2286         gint buf_size = st_src->st_blksize;
2287         MonoThreadInfo *info = mono_thread_info_current ();
2288
2289         buf_size = buf_size < 8192 ? 8192 : (buf_size > 65536 ? 65536 : buf_size);
2290         buf = (gchar *) g_malloc (buf_size);
2291
2292         for (;;) {
2293                 MONO_ENTER_GC_SAFE;
2294                 remain = read (src_fd, buf, buf_size);
2295                 MONO_EXIT_GC_SAFE;
2296                 if (remain < 0) {
2297                         if (errno == EINTR && !mono_thread_info_is_interrupt_state (info))
2298                                 continue;
2299
2300                         if (report_errors)
2301                                 _wapi_set_last_error_from_errno ();
2302
2303                         g_free (buf);
2304                         return FALSE;
2305                 }
2306                 if (remain == 0) {
2307                         break;
2308                 }
2309
2310                 wbuf = buf;
2311                 while (remain > 0) {
2312                         MONO_ENTER_GC_SAFE;
2313                         n = write (dest_fd, wbuf, remain);
2314                         MONO_EXIT_GC_SAFE;
2315                         if (n < 0) {
2316                                 if (errno == EINTR && !mono_thread_info_is_interrupt_state (info))
2317                                         continue;
2318
2319                                 if (report_errors)
2320                                         _wapi_set_last_error_from_errno ();
2321                                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: write failed.", __func__);
2322                                 g_free (buf);
2323                                 return FALSE;
2324                         }
2325
2326                         remain -= n;
2327                         wbuf += n;
2328                 }
2329         }
2330
2331         g_free (buf);
2332         return TRUE ;
2333 }
2334
2335 #if HOST_DARWIN
2336 static int
2337 _wapi_clonefile(const char *from, const char *to, int flags)
2338 {
2339         gchar *located_from, *located_to;
2340         int ret;
2341
2342         g_assert (clonefile_ptr != NULL);
2343
2344         located_from = mono_portability_find_file (from, FALSE);
2345         located_to = mono_portability_find_file (to, FALSE);
2346
2347         MONO_ENTER_GC_SAFE;
2348         ret = clonefile_ptr (
2349                 located_from == NULL ? from : located_from,
2350                 located_to == NULL ? to : located_to,
2351                 flags);
2352         MONO_EXIT_GC_SAFE;
2353
2354         g_free (located_from);
2355         g_free (located_to);
2356
2357         return ret;
2358 }
2359 #endif
2360
2361 static gboolean
2362 CopyFile (const gunichar2 *name, const gunichar2 *dest_name, gboolean fail_if_exists)
2363 {
2364         gchar *utf8_src, *utf8_dest;
2365         struct stat st, dest_st;
2366         gboolean ret = TRUE;
2367
2368         if(name==NULL) {
2369                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
2370
2371                 mono_w32error_set_last (ERROR_INVALID_NAME);
2372                 return(FALSE);
2373         }
2374
2375         utf8_src = mono_unicode_to_external (name);
2376         if (utf8_src == NULL) {
2377                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion of source returned NULL",
2378                            __func__);
2379
2380                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
2381                 return(FALSE);
2382         }
2383
2384         if(dest_name==NULL) {
2385                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: dest is NULL", __func__);
2386
2387                 g_free (utf8_src);
2388                 mono_w32error_set_last (ERROR_INVALID_NAME);
2389                 return(FALSE);
2390         }
2391
2392         utf8_dest = mono_unicode_to_external (dest_name);
2393         if (utf8_dest == NULL) {
2394                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion of dest returned NULL",
2395                            __func__);
2396
2397                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
2398
2399                 g_free (utf8_src);
2400
2401                 return(FALSE);
2402         }
2403
2404         gint src_fd, dest_fd;
2405         gint ret_utime;
2406         gint syscall_res;
2407
2408         src_fd = _wapi_open (utf8_src, O_RDONLY, 0);
2409         if (src_fd < 0) {
2410                 _wapi_set_last_path_error_from_errno (NULL, utf8_src);
2411
2412                 g_free (utf8_src);
2413                 g_free (utf8_dest);
2414
2415                 return(FALSE);
2416         }
2417
2418         MONO_ENTER_GC_SAFE;
2419         syscall_res = fstat (src_fd, &st);
2420         MONO_EXIT_GC_SAFE;
2421         if (syscall_res < 0) {
2422                 _wapi_set_last_error_from_errno ();
2423
2424                 g_free (utf8_src);
2425                 g_free (utf8_dest);
2426                 MONO_ENTER_GC_SAFE;
2427                 close (src_fd);
2428                 MONO_EXIT_GC_SAFE;
2429
2430                 return(FALSE);
2431         }
2432
2433         if (!_wapi_stat (utf8_dest, &dest_st)) {
2434                 /* Before trying to open/create the dest, we need to report a 'file busy'
2435                  * error if src and dest are actually the same file. We do the check here to take
2436                  * advantage of the IOMAP capability */
2437                 if (st.st_dev == dest_st.st_dev && st.st_ino == dest_st.st_ino) {
2438                         g_free (utf8_src);
2439                         g_free (utf8_dest);
2440                         MONO_ENTER_GC_SAFE;
2441                         close (src_fd);
2442                         MONO_EXIT_GC_SAFE;
2443
2444                         mono_w32error_set_last (ERROR_SHARING_VIOLATION);
2445                         return (FALSE);
2446                 }
2447
2448                 /* Take advantage of the fact that we already know the file exists and bail out
2449                  * early */
2450                 if (fail_if_exists) {
2451                         g_free (utf8_src);
2452                         g_free (utf8_dest);
2453                         MONO_ENTER_GC_SAFE;
2454                         close (src_fd);
2455                         MONO_EXIT_GC_SAFE;
2456
2457                         mono_w32error_set_last (ERROR_ALREADY_EXISTS);
2458                         return (FALSE);
2459                 }
2460
2461 #if HOST_DARWIN
2462                 /* If we attempt to use clonefile API we need to unlink the destination file
2463                  * first */
2464                 if (clonefile_ptr != NULL) {
2465
2466                         /* Bail out if the destination is read-only */
2467                         if (!is_file_writable (&dest_st, utf8_dest)) {
2468                                 g_free (utf8_src);
2469                                 g_free (utf8_dest);
2470                                 MONO_ENTER_GC_SAFE;
2471                                 close (src_fd);
2472                                 MONO_EXIT_GC_SAFE;
2473
2474                                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
2475                                 return (FALSE);
2476                         }
2477
2478                         _wapi_unlink (utf8_dest);
2479                 }
2480 #endif
2481         }
2482
2483 #if HOST_DARWIN
2484         if (clonefile_ptr != NULL) {
2485                 ret = _wapi_clonefile (utf8_src, utf8_dest, 0);
2486                 if (ret == 0 || (errno != ENOTSUP && errno != EXDEV)) {
2487                         g_free (utf8_src);
2488                         g_free (utf8_dest);
2489                         MONO_ENTER_GC_SAFE;
2490                         close (src_fd);
2491                         MONO_EXIT_GC_SAFE;
2492
2493                         if (ret == 0) {
2494                                 return (TRUE);
2495                         } else {
2496                                 _wapi_set_last_error_from_errno ();
2497                                 return (FALSE);
2498                         }
2499                 }
2500         }
2501 #endif
2502
2503         if (fail_if_exists) {
2504                 dest_fd = _wapi_open (utf8_dest, O_WRONLY | O_CREAT | O_EXCL, st.st_mode);
2505         } else {
2506                 /* FIXME: it kinda sucks that this code path potentially scans
2507                  * the directory twice due to the weird mono_w32error_set_last()
2508                  * behavior. */
2509                 dest_fd = _wapi_open (utf8_dest, O_WRONLY | O_TRUNC, st.st_mode);
2510                 if (dest_fd < 0) {
2511                         /* The file does not exist, try creating it */
2512                         dest_fd = _wapi_open (utf8_dest, O_WRONLY | O_CREAT | O_TRUNC, st.st_mode);
2513                 } else {
2514                         /* Apparently this error is set if we
2515                          * overwrite the dest file
2516                          */
2517                         mono_w32error_set_last (ERROR_ALREADY_EXISTS);
2518                 }
2519         }
2520         if (dest_fd < 0) {
2521                 _wapi_set_last_error_from_errno ();
2522
2523                 g_free (utf8_src);
2524                 g_free (utf8_dest);
2525                 MONO_ENTER_GC_SAFE;
2526                 close (src_fd);
2527                 MONO_EXIT_GC_SAFE;
2528
2529                 return(FALSE);
2530         }
2531
2532         if (!write_file (src_fd, dest_fd, &st, TRUE))
2533                 ret = FALSE;
2534
2535         close (src_fd);
2536         close (dest_fd);
2537
2538 #ifdef HAVE_STRUCT_TIMEVAL
2539         struct timeval times [2];
2540         memset (times, 0, sizeof (times));
2541
2542         convert_stattime_access_to_timeval (&times [0], &st);
2543         convert_stattime_mod_to_timeval (&times [1], &st);
2544
2545         ret_utime = _wapi_utimes (utf8_dest, times);
2546 #else
2547         struct utimbuf dest_time;
2548         dest_time.modtime = st.st_mtime;
2549         dest_time.actime = st.st_atime;
2550
2551         ret_utime = _wapi_utime (utf8_dest, &dest_time);
2552 #endif
2553         if (ret_utime == -1)
2554                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: file [%s] utime failed: %s", __func__, utf8_dest, g_strerror(errno));
2555
2556         g_free (utf8_src);
2557         g_free (utf8_dest);
2558
2559         return ret;
2560 }
2561
2562 static gchar*
2563 convert_arg_to_utf8 (const gunichar2 *arg, const gchar *arg_name)
2564 {
2565         gchar *utf8_ret;
2566
2567         if (arg == NULL) {
2568                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: %s is NULL", __func__, arg_name);
2569                 mono_w32error_set_last (ERROR_INVALID_NAME);
2570                 return NULL;
2571         }
2572
2573         utf8_ret = mono_unicode_to_external (arg);
2574         if (utf8_ret == NULL) {
2575                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion of %s returned NULL",
2576                            __func__, arg_name);
2577                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
2578                 return NULL;
2579         }
2580
2581         return utf8_ret;
2582 }
2583
2584 static gboolean
2585 ReplaceFile (const gunichar2 *replacedFileName, const gunichar2 *replacementFileName, const gunichar2 *backupFileName, guint32 replaceFlags, gpointer exclude, gpointer reserved)
2586 {
2587         gint result, backup_fd = -1,replaced_fd = -1;
2588         gchar *utf8_replacedFileName, *utf8_replacementFileName = NULL, *utf8_backupFileName = NULL;
2589         struct stat stBackup;
2590         gboolean ret = FALSE;
2591
2592         if (!(utf8_replacedFileName = convert_arg_to_utf8 (replacedFileName, "replacedFileName")))
2593                 return FALSE;
2594         if (!(utf8_replacementFileName = convert_arg_to_utf8 (replacementFileName, "replacementFileName")))
2595                 goto replace_cleanup;
2596         if (backupFileName != NULL) {
2597                 if (!(utf8_backupFileName = convert_arg_to_utf8 (backupFileName, "backupFileName")))
2598                         goto replace_cleanup;
2599         }
2600
2601         if (utf8_backupFileName) {
2602                 // Open the backup file for read so we can restore the file if an error occurs.
2603                 backup_fd = _wapi_open (utf8_backupFileName, O_RDONLY, 0);
2604                 result = _wapi_rename (utf8_replacedFileName, utf8_backupFileName);
2605                 if (result == -1)
2606                         goto replace_cleanup;
2607         }
2608
2609         result = _wapi_rename (utf8_replacementFileName, utf8_replacedFileName);
2610         if (result == -1) {
2611                 _wapi_set_last_path_error_from_errno (NULL, utf8_replacementFileName);
2612                 _wapi_rename (utf8_backupFileName, utf8_replacedFileName);
2613                 if (backup_fd != -1 && !fstat (backup_fd, &stBackup)) {
2614                         replaced_fd = _wapi_open (utf8_backupFileName, O_WRONLY | O_CREAT | O_TRUNC,
2615                                                   stBackup.st_mode);
2616
2617                         if (replaced_fd == -1)
2618                                 goto replace_cleanup;
2619
2620                         write_file (backup_fd, replaced_fd, &stBackup, FALSE);
2621                 }
2622
2623                 goto replace_cleanup;
2624         }
2625
2626         ret = TRUE;
2627
2628 replace_cleanup:
2629         g_free (utf8_replacedFileName);
2630         g_free (utf8_replacementFileName);
2631         g_free (utf8_backupFileName);
2632         if (backup_fd != -1) {
2633                 MONO_ENTER_GC_SAFE;
2634                 close (backup_fd);
2635                 MONO_EXIT_GC_SAFE;
2636         }
2637         if (replaced_fd != -1) {
2638                 MONO_ENTER_GC_SAFE;
2639                 close (replaced_fd);
2640                 MONO_EXIT_GC_SAFE;
2641         }
2642         return ret;
2643 }
2644
2645 static gpointer
2646 _wapi_stdhandle_create (gint fd, const gchar *name)
2647 {
2648         gint flags;
2649         FileHandle *filehandle;
2650
2651         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: creating standard handle type %s, fd %d", __func__, name, fd);
2652
2653         /* Check if fd is valid */
2654         do {
2655                 flags = fcntl(fd, F_GETFL);
2656         } while (flags == -1 && errno == EINTR);
2657
2658         if (flags == -1) {
2659                 /* Invalid fd.  Not really much point checking for EBADF
2660                  * specifically
2661                  */
2662                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fcntl error on fd %d: %s", __func__, fd, g_strerror(errno));
2663
2664                 mono_w32error_set_last (mono_w32error_unix_to_win32 (errno));
2665                 return INVALID_HANDLE_VALUE;
2666         }
2667
2668         filehandle = file_data_create (MONO_FDTYPE_CONSOLE, fd);
2669         filehandle->filename = g_strdup(name);
2670
2671         switch (flags & (O_RDONLY|O_WRONLY|O_RDWR)) {
2672         case O_RDONLY:
2673                 filehandle->fileaccess = GENERIC_READ;
2674                 break;
2675         case O_WRONLY:
2676                 filehandle->fileaccess = GENERIC_WRITE;
2677                 break;
2678         case O_RDWR:
2679                 filehandle->fileaccess = GENERIC_READ | GENERIC_WRITE;
2680                 break;
2681         default:
2682                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Can't figure out flags 0x%x", __func__, flags);
2683                 filehandle->fileaccess = 0;
2684                 break;
2685         }
2686
2687         /* some default security attributes might be needed */
2688         filehandle->security_attributes = 0;
2689
2690         /* Apparently input handles can't be written to.  (I don't
2691          * know if output or error handles can't be read from.)
2692          */
2693         if (fd == 0)
2694                 filehandle->fileaccess &= ~GENERIC_WRITE;
2695
2696         filehandle->sharemode = 0;
2697         filehandle->attrs = 0;
2698
2699         if (!mono_fdhandle_try_insert ((MonoFDHandle*) filehandle)) {
2700                 /* we raced between 2 invocations of _wapi_stdhandle_create */
2701                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2702                 return GINT_TO_POINTER(fd);
2703         }
2704
2705         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: returning handle %p", __func__, GINT_TO_POINTER(((MonoFDHandle*) filehandle)->fd));
2706
2707         return GINT_TO_POINTER(((MonoFDHandle*) filehandle)->fd);
2708 }
2709
2710 enum {
2711         STD_INPUT_HANDLE  = -10,
2712         STD_OUTPUT_HANDLE = -11,
2713         STD_ERROR_HANDLE  = -12,
2714 };
2715
2716 static gpointer
2717 mono_w32file_get_std_handle (gint stdhandle)
2718 {
2719         FileHandle **filehandle;
2720         gint fd;
2721         const gchar *name;
2722
2723         switch(stdhandle) {
2724         case STD_INPUT_HANDLE:
2725                 fd = 0;
2726                 name = "<stdin>";
2727                 break;
2728
2729         case STD_OUTPUT_HANDLE:
2730                 fd = 1;
2731                 name = "<stdout>";
2732                 break;
2733
2734         case STD_ERROR_HANDLE:
2735                 fd = 2;
2736                 name = "<stderr>";
2737                 break;
2738
2739         default:
2740                 g_assert_not_reached ();
2741         }
2742
2743         if (!mono_fdhandle_lookup_and_ref(fd, (MonoFDHandle**) &filehandle)) {
2744                 gpointer handle;
2745
2746                 handle = _wapi_stdhandle_create (fd, name);
2747                 if (handle == INVALID_HANDLE_VALUE) {
2748                         mono_w32error_set_last (ERROR_NO_MORE_FILES);
2749                         return INVALID_HANDLE_VALUE;
2750                 }
2751         }
2752
2753         return GINT_TO_POINTER (fd);
2754 }
2755
2756 static gboolean
2757 mono_w32file_read_or_write (gboolean read, gpointer handle, gpointer buffer, guint32 numbytes, guint32 *bytesread, gint32 *win32error)
2758 {
2759         MONO_REQ_GC_UNSAFE_MODE;
2760
2761         FileHandle *filehandle;
2762         gboolean ret = FALSE;
2763
2764         gboolean const ref = mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle);
2765         if (!ref) {
2766                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2767                 goto exit;
2768         }
2769
2770         switch (((MonoFDHandle*) filehandle)->type) {
2771         case MONO_FDTYPE_FILE:
2772                 ret = (read ? file_read : file_write) (filehandle, buffer, numbytes, bytesread);
2773                 break;
2774         case MONO_FDTYPE_CONSOLE:
2775                 ret = (read ? console_read : console_write) (filehandle, buffer, numbytes, bytesread);
2776                 break;
2777         case MONO_FDTYPE_PIPE:
2778                 ret = (read ? pipe_read : pipe_write) (filehandle, buffer, numbytes, bytesread);
2779                 break;
2780         default:
2781                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2782                 break;
2783         }
2784
2785 exit:
2786         if (ref)
2787                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2788         if (!ret)
2789                 *win32error = mono_w32error_get_last ();
2790         return ret;
2791 }
2792
2793 gboolean
2794 mono_w32file_read (gpointer handle, gpointer buffer, guint32 numbytes, guint32 *bytesread, gint32 *win32error)
2795 {
2796         return mono_w32file_read_or_write (TRUE, handle, buffer, numbytes, bytesread, win32error);
2797 }
2798
2799 gboolean
2800 mono_w32file_write (gpointer handle, gconstpointer buffer, guint32 numbytes, guint32 *byteswritten, gint32 *win32error)
2801 {
2802         return mono_w32file_read_or_write (FALSE, handle, (gpointer)buffer, numbytes, byteswritten, win32error);
2803 }
2804
2805 gboolean
2806 mono_w32file_flush (gpointer handle)
2807 {
2808         FileHandle *filehandle;
2809         gboolean ret;
2810
2811         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2812                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2813                 return FALSE;
2814         }
2815
2816         switch (((MonoFDHandle*) filehandle)->type) {
2817         case MONO_FDTYPE_FILE:
2818                 ret = file_flush(filehandle);
2819                 break;
2820         default:
2821                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2822                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2823                 return FALSE;
2824         }
2825
2826         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2827         return ret;
2828 }
2829
2830 gboolean
2831 mono_w32file_truncate (gpointer handle)
2832 {
2833         FileHandle *filehandle;
2834         gboolean ret;
2835
2836         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2837                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2838                 return FALSE;
2839         }
2840
2841         switch (((MonoFDHandle*) filehandle)->type) {
2842         case MONO_FDTYPE_FILE:
2843                 ret = file_setendoffile(filehandle);
2844                 break;
2845         default:
2846                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2847                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2848                 return FALSE;
2849         }
2850
2851         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2852         return ret;
2853 }
2854
2855 guint32
2856 mono_w32file_seek (gpointer handle, gint32 movedistance, gint32 *highmovedistance, guint32 method)
2857 {
2858         FileHandle *filehandle;
2859         guint32 ret;
2860
2861         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2862                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2863                 return INVALID_SET_FILE_POINTER;
2864         }
2865
2866         switch (((MonoFDHandle*) filehandle)->type) {
2867         case MONO_FDTYPE_FILE:
2868                 ret = file_seek(filehandle, movedistance, highmovedistance, method);
2869                 break;
2870         default:
2871                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2872                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2873                 return INVALID_SET_FILE_POINTER;
2874         }
2875
2876         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2877         return ret;
2878 }
2879
2880 gint
2881 mono_w32file_get_type(gpointer handle)
2882 {
2883         FileHandle *filehandle;
2884         gint ret;
2885
2886         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2887                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2888                 return FILE_TYPE_UNKNOWN;
2889         }
2890
2891         switch (((MonoFDHandle*) filehandle)->type) {
2892         case MONO_FDTYPE_FILE:
2893                 ret = FILE_TYPE_DISK;
2894                 break;
2895         case MONO_FDTYPE_CONSOLE:
2896                 ret = FILE_TYPE_CHAR;
2897                 break;
2898         case MONO_FDTYPE_PIPE:
2899                 ret = FILE_TYPE_PIPE;
2900                 break;
2901         default:
2902                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2903                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2904                 return FILE_TYPE_UNKNOWN;
2905         }
2906
2907         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2908         return ret;
2909 }
2910
2911 static guint32
2912 GetFileSize(gpointer handle, guint32 *highsize)
2913 {
2914         FileHandle *filehandle;
2915         guint32 ret;
2916
2917         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2918                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2919                 return INVALID_FILE_SIZE;
2920         }
2921
2922         switch (((MonoFDHandle*) filehandle)->type) {
2923         case MONO_FDTYPE_FILE:
2924                 ret = file_getfilesize(filehandle, highsize);
2925                 break;
2926         default:
2927                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2928                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2929                 return INVALID_FILE_SIZE;
2930         }
2931
2932         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2933         return ret;
2934 }
2935
2936 gboolean
2937 mono_w32file_set_times(gpointer handle, const FILETIME *create_time, const FILETIME *access_time, const FILETIME *write_time)
2938 {
2939         FileHandle *filehandle;
2940         gboolean ret;
2941
2942         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
2943                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2944                 return FALSE;
2945         }
2946
2947         switch (((MonoFDHandle*) filehandle)->type) {
2948         case MONO_FDTYPE_FILE:
2949                 ret = file_setfiletime(filehandle, create_time, access_time, write_time);
2950                 break;
2951         default:
2952                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
2953                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2954                 return FALSE;
2955         }
2956
2957         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
2958         return ret;
2959 }
2960
2961 /* A tick is a 100-nanosecond interval.  File time epoch is Midnight,
2962  * January 1 1601 GMT
2963  */
2964
2965 #define isleap(y) ((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0))
2966
2967 static const guint16 mon_yday[2][13]={
2968         {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
2969         {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366},
2970 };
2971
2972 gboolean
2973 mono_w32file_filetime_to_systemtime(const FILETIME *file_time, SYSTEMTIME *system_time)
2974 {
2975         gint64 file_ticks, totaldays, rem, y;
2976         const guint16 *ip;
2977
2978         if(system_time==NULL) {
2979                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: system_time NULL", __func__);
2980
2981                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
2982                 return(FALSE);
2983         }
2984
2985         file_ticks=((gint64)file_time->dwHighDateTime << 32) +
2986                 file_time->dwLowDateTime;
2987
2988         /* Really compares if file_ticks>=0x8000000000000000
2989          * (LLONG_MAX+1) but we're working with a signed value for the
2990          * year and day calculation to work later
2991          */
2992         if(file_ticks<0) {
2993                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: file_time too big", __func__);
2994
2995                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
2996                 return(FALSE);
2997         }
2998
2999         totaldays=(file_ticks / TICKS_PER_DAY);
3000         rem = file_ticks % TICKS_PER_DAY;
3001         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: totaldays: %" G_GINT64_FORMAT " rem: %" G_GINT64_FORMAT, __func__,
3002                   totaldays, rem);
3003
3004         system_time->wHour=rem/TICKS_PER_HOUR;
3005         rem %= TICKS_PER_HOUR;
3006         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Hour: %d rem: %" G_GINT64_FORMAT,  __func__,
3007                   system_time->wHour, rem);
3008
3009         system_time->wMinute = rem / TICKS_PER_MINUTE;
3010         rem %= TICKS_PER_MINUTE;
3011         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Minute: %d rem: %" G_GINT64_FORMAT, __func__,
3012                   system_time->wMinute, rem);
3013
3014         system_time->wSecond = rem / TICKS_PER_SECOND;
3015         rem %= TICKS_PER_SECOND;
3016         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Second: %d rem: %" G_GINT64_FORMAT, __func__,
3017                   system_time->wSecond, rem);
3018
3019         system_time->wMilliseconds = rem / TICKS_PER_MILLISECOND;
3020         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Milliseconds: %d", __func__,
3021                   system_time->wMilliseconds);
3022
3023         /* January 1, 1601 was a Monday, according to Emacs calendar */
3024         system_time->wDayOfWeek = ((1 + totaldays) % 7) + 1;
3025         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Day of week: %d", __func__, system_time->wDayOfWeek);
3026
3027         /* This algorithm to find year and month given days from epoch
3028          * from glibc
3029          */
3030         y=1601;
3031
3032 #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
3033 #define LEAPS_THRU_END_OF(y) (DIV(y, 4) - DIV (y, 100) + DIV (y, 400))
3034
3035         while(totaldays < 0 || totaldays >= (isleap(y)?366:365)) {
3036                 /* Guess a corrected year, assuming 365 days per year */
3037                 gint64 yg = y + totaldays / 365 - (totaldays % 365 < 0);
3038                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: totaldays: %" G_GINT64_FORMAT " yg: %" G_GINT64_FORMAT " y: %" G_GINT64_FORMAT, __func__,
3039                           totaldays, yg, y);
3040                 g_message("%s: LEAPS(yg): %li LEAPS(y): %li", __func__,
3041                           LEAPS_THRU_END_OF(yg-1), LEAPS_THRU_END_OF(y-1));
3042
3043                 /* Adjust days and y to match the guessed year. */
3044                 totaldays -= ((yg - y) * 365
3045                               + LEAPS_THRU_END_OF (yg - 1)
3046                               - LEAPS_THRU_END_OF (y - 1));
3047                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: totaldays: %" G_GINT64_FORMAT,
3048                           __func__, totaldays);
3049                 y = yg;
3050                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: y: %" G_GINT64_FORMAT, __func__, y);
3051         }
3052
3053         system_time->wYear = y;
3054         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Year: %d", __func__, system_time->wYear);
3055
3056         ip = mon_yday[isleap(y)];
3057
3058         for(y=11; totaldays < ip[y]; --y) {
3059                 continue;
3060         }
3061         totaldays-=ip[y];
3062         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: totaldays: %" G_GINT64_FORMAT, __func__, totaldays);
3063
3064         system_time->wMonth = y + 1;
3065         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Month: %d", __func__, system_time->wMonth);
3066
3067         system_time->wDay = totaldays + 1;
3068         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Day: %d", __func__, system_time->wDay);
3069
3070         return(TRUE);
3071 }
3072
3073 static void
3074 findhandle_destroy (gpointer data)
3075 {
3076         FindHandle *findhandle;
3077
3078         findhandle = (FindHandle*) data;
3079         g_assert (findhandle);
3080
3081         mono_coop_mutex_destroy (&findhandle->mutex);
3082
3083         if (findhandle->namelist)
3084                 g_strfreev (findhandle->namelist);
3085         if (findhandle->dir_part)
3086                 g_free (findhandle->dir_part);
3087
3088         g_free (findhandle);
3089 }
3090
3091 static FindHandle*
3092 findhandle_create (void)
3093 {
3094         FindHandle* findhandle;
3095
3096         findhandle = g_new0 (FindHandle, 1);
3097         mono_refcount_init (findhandle, findhandle_destroy);
3098
3099         mono_coop_mutex_init (&findhandle->mutex);
3100
3101         return findhandle;
3102 }
3103
3104 static void
3105 findhandle_insert (FindHandle *findhandle)
3106 {
3107         mono_coop_mutex_lock (&finds_mutex);
3108
3109         if (g_hash_table_lookup_extended (finds, (gpointer) findhandle, NULL, NULL))
3110                 g_error("%s: duplicate Find handle %p", __func__, (gpointer) findhandle);
3111
3112         g_hash_table_insert (finds, (gpointer) findhandle, findhandle);
3113
3114         mono_coop_mutex_unlock (&finds_mutex);
3115 }
3116
3117 static gboolean
3118 findhandle_lookup_and_ref (gpointer handle, FindHandle **findhandle)
3119 {
3120         mono_coop_mutex_lock (&finds_mutex);
3121
3122         if (!g_hash_table_lookup_extended (finds, handle, NULL, (gpointer*) findhandle)) {
3123                 mono_coop_mutex_unlock (&finds_mutex);
3124                 return FALSE;
3125         }
3126
3127         mono_refcount_inc (*findhandle);
3128
3129         mono_coop_mutex_unlock (&finds_mutex);
3130
3131         return TRUE;
3132 }
3133
3134 static void
3135 findhandle_unref (FindHandle *findhandle)
3136 {
3137         mono_refcount_dec (findhandle);
3138 }
3139
3140 static gboolean
3141 findhandle_close (gpointer handle)
3142 {
3143         FindHandle *findhandle;
3144         gboolean removed;
3145
3146         mono_coop_mutex_lock (&finds_mutex);
3147
3148         if (!g_hash_table_lookup_extended (finds, handle, NULL, (gpointer*) &findhandle)) {
3149                 mono_coop_mutex_unlock (&finds_mutex);
3150
3151                 return FALSE;
3152         }
3153
3154         removed = g_hash_table_remove (finds, (gpointer) findhandle);
3155         g_assert (removed);
3156
3157         mono_coop_mutex_unlock (&finds_mutex);
3158
3159         return TRUE;
3160 }
3161
3162 static void
3163 finds_remove (gpointer data)
3164 {
3165         FindHandle* findhandle;
3166
3167         findhandle = (FindHandle*) data;
3168         g_assert (findhandle);
3169
3170         mono_refcount_dec (findhandle);
3171 }
3172
3173 gpointer
3174 mono_w32file_find_first (const gunichar2 *pattern, WIN32_FIND_DATA *find_data)
3175 {
3176         FindHandle *findhandle;
3177         gchar *utf8_pattern = NULL, *dir_part, *entry_part, **namelist;
3178         gint result;
3179
3180         if (pattern == NULL) {
3181                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: pattern is NULL", __func__);
3182
3183                 mono_w32error_set_last (ERROR_PATH_NOT_FOUND);
3184                 return(INVALID_HANDLE_VALUE);
3185         }
3186
3187         utf8_pattern = mono_unicode_to_external (pattern);
3188         if (utf8_pattern == NULL) {
3189                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3190
3191                 mono_w32error_set_last (ERROR_INVALID_NAME);
3192                 return(INVALID_HANDLE_VALUE);
3193         }
3194
3195         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: looking for [%s]", __func__, utf8_pattern);
3196
3197         /* Figure out which bit of the pattern is the directory */
3198         dir_part = _wapi_dirname (utf8_pattern);
3199         entry_part = _wapi_basename (utf8_pattern);
3200
3201 #if 0
3202         /* Don't do this check for now, it breaks if directories
3203          * really do have metachars in their names (see bug 58116).
3204          * FIXME: Figure out a better solution to keep some checks...
3205          */
3206         if (strchr (dir_part, '*') || strchr (dir_part, '?')) {
3207                 mono_w32error_set_last (ERROR_INVALID_NAME);
3208                 g_free (dir_part);
3209                 g_free (entry_part);
3210                 g_free (utf8_pattern);
3211                 return(INVALID_HANDLE_VALUE);
3212         }
3213 #endif
3214
3215         /* The pattern can specify a directory or a set of files.
3216          *
3217          * The pattern can have wildcard characters ? and *, but only
3218          * in the section after the last directory delimiter.  (Return
3219          * ERROR_INVALID_NAME if there are wildcards in earlier path
3220          * sections.)  "*" has the usual 0-or-more chars meaning.  "?"
3221          * means "match one character", "??" seems to mean "match one
3222          * or two characters", "???" seems to mean "match one, two or
3223          * three characters", etc.  Windows will also try and match
3224          * the mangled "short name" of files, so 8 character patterns
3225          * with wildcards will show some surprising results.
3226          *
3227          * All the written documentation I can find says that '?'
3228          * should only match one character, and doesn't mention '??',
3229          * '???' etc.  I'm going to assume that the strict behaviour
3230          * (ie '???' means three and only three characters) is the
3231          * correct one, because that lets me use fnmatch(3) rather
3232          * than mess around with regexes.
3233          */
3234
3235         namelist = NULL;
3236         result = _wapi_io_scandir (dir_part, entry_part,
3237                                    &namelist);
3238
3239         if (result == 0) {
3240                 /* No files, which windows seems to call
3241                  * FILE_NOT_FOUND
3242                  */
3243                 mono_w32error_set_last (ERROR_FILE_NOT_FOUND);
3244                 g_free (utf8_pattern);
3245                 g_free (entry_part);
3246                 g_free (dir_part);
3247                 g_strfreev (namelist);
3248                 return (INVALID_HANDLE_VALUE);
3249         }
3250
3251         if (result < 0) {
3252                 _wapi_set_last_path_error_from_errno (dir_part, NULL);
3253                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: scandir error: %s", __func__, g_strerror (errno));
3254                 g_free (utf8_pattern);
3255                 g_free (entry_part);
3256                 g_free (dir_part);
3257                 g_strfreev (namelist);
3258                 return (INVALID_HANDLE_VALUE);
3259         }
3260
3261         g_free (utf8_pattern);
3262         g_free (entry_part);
3263
3264         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Got %d matches", __func__, result);
3265
3266         findhandle = findhandle_create ();
3267         findhandle->namelist = namelist;
3268         findhandle->dir_part = dir_part;
3269         findhandle->num = result;
3270         findhandle->count = 0;
3271
3272         findhandle_insert (findhandle);
3273
3274         if (!mono_w32file_find_next ((gpointer) findhandle, find_data)) {
3275                 mono_w32file_find_close ((gpointer) findhandle);
3276                 mono_w32error_set_last (ERROR_NO_MORE_FILES);
3277                 return INVALID_HANDLE_VALUE;
3278         }
3279
3280         return (gpointer) findhandle;
3281 }
3282
3283 gboolean
3284 mono_w32file_find_next (gpointer handle, WIN32_FIND_DATA *find_data)
3285 {
3286         FindHandle *findhandle;
3287         struct stat buf, linkbuf;
3288         gint result;
3289         gchar *filename;
3290         gchar *utf8_filename, *utf8_basename;
3291         gunichar2 *utf16_basename;
3292         time_t create_time;
3293         glong bytes;
3294         gboolean ret = FALSE;
3295
3296         if (!findhandle_lookup_and_ref (handle, &findhandle)) {
3297                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
3298                 return FALSE;
3299         }
3300
3301         mono_coop_mutex_lock (&findhandle->mutex);
3302
3303 retry:
3304         if (findhandle->count >= findhandle->num) {
3305                 mono_w32error_set_last (ERROR_NO_MORE_FILES);
3306                 goto cleanup;
3307         }
3308
3309         /* stat next match */
3310
3311         filename = g_build_filename (findhandle->dir_part, findhandle->namelist[findhandle->count ++], NULL);
3312
3313         result = _wapi_stat (filename, &buf);
3314         if (result == -1 && errno == ENOENT) {
3315                 /* Might be a dangling symlink */
3316                 result = _wapi_lstat (filename, &buf);
3317         }
3318
3319         if (result != 0) {
3320                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: stat failed: %s", __func__, filename);
3321
3322                 g_free (filename);
3323                 goto retry;
3324         }
3325
3326         result = _wapi_lstat (filename, &linkbuf);
3327         if (result != 0) {
3328                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: lstat failed: %s", __func__, filename);
3329
3330                 g_free (filename);
3331                 goto retry;
3332         }
3333
3334         utf8_filename = mono_utf8_from_external (filename);
3335         if (utf8_filename == NULL) {
3336                 /* We couldn't turn this filename into utf8 (eg the
3337                  * encoding of the name wasn't convertible), so just
3338                  * ignore it.
3339                  */
3340                 g_warning ("%s: Bad encoding for '%s'\nConsider using MONO_EXTERNAL_ENCODINGS\n", __func__, filename);
3341
3342                 g_free (filename);
3343                 goto retry;
3344         }
3345         g_free (filename);
3346
3347         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Found [%s]", __func__, utf8_filename);
3348
3349         /* fill data block */
3350
3351         if (buf.st_mtime < buf.st_ctime)
3352                 create_time = buf.st_mtime;
3353         else
3354                 create_time = buf.st_ctime;
3355
3356         find_data->dwFileAttributes = _wapi_stat_to_file_attributes (utf8_filename, &buf, &linkbuf);
3357
3358         time_t_to_filetime (create_time, &find_data->ftCreationTime);
3359         time_t_to_filetime (buf.st_atime, &find_data->ftLastAccessTime);
3360         time_t_to_filetime (buf.st_mtime, &find_data->ftLastWriteTime);
3361
3362         if (find_data->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
3363                 find_data->nFileSizeHigh = 0;
3364                 find_data->nFileSizeLow = 0;
3365         } else {
3366                 find_data->nFileSizeHigh = buf.st_size >> 32;
3367                 find_data->nFileSizeLow = buf.st_size & 0xFFFFFFFF;
3368         }
3369
3370         find_data->dwReserved0 = 0;
3371         find_data->dwReserved1 = 0;
3372
3373         utf8_basename = _wapi_basename (utf8_filename);
3374         utf16_basename = g_utf8_to_utf16 (utf8_basename, -1, NULL, &bytes,
3375                                           NULL);
3376         if(utf16_basename==NULL) {
3377                 g_free (utf8_basename);
3378                 g_free (utf8_filename);
3379                 goto retry;
3380         }
3381         ret = TRUE;
3382
3383         /* utf16 is 2 * utf8 */
3384         bytes *= 2;
3385
3386         memset (find_data->cFileName, '\0', (MAX_PATH*2));
3387
3388         /* Truncating a utf16 string like this might leave the last
3389          * gchar incomplete
3390          */
3391         memcpy (find_data->cFileName, utf16_basename,
3392                 bytes<(MAX_PATH*2)-2?bytes:(MAX_PATH*2)-2);
3393
3394         find_data->cAlternateFileName [0] = 0;  /* not used */
3395
3396         g_free (utf8_basename);
3397         g_free (utf8_filename);
3398         g_free (utf16_basename);
3399
3400 cleanup:
3401         mono_coop_mutex_unlock (&findhandle->mutex);
3402
3403         findhandle_unref (findhandle);
3404
3405         return(ret);
3406 }
3407
3408 gboolean
3409 mono_w32file_find_close (gpointer handle)
3410 {
3411         if (!findhandle_close (handle)) {
3412                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
3413                 return FALSE;
3414         }
3415
3416         return TRUE;
3417 }
3418
3419 gboolean
3420 mono_w32file_create_directory (const gunichar2 *name)
3421 {
3422         gchar *utf8_name;
3423         gint result;
3424
3425         if (name == NULL) {
3426                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
3427
3428                 mono_w32error_set_last (ERROR_INVALID_NAME);
3429                 return(FALSE);
3430         }
3431
3432         utf8_name = mono_unicode_to_external (name);
3433         if (utf8_name == NULL) {
3434                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3435
3436                 mono_w32error_set_last (ERROR_INVALID_NAME);
3437                 return FALSE;
3438         }
3439
3440         result = _wapi_mkdir (utf8_name, 0777);
3441
3442         if (result == 0) {
3443                 g_free (utf8_name);
3444                 return TRUE;
3445         }
3446
3447         _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3448         g_free (utf8_name);
3449         return FALSE;
3450 }
3451
3452 gboolean
3453 mono_w32file_remove_directory (const gunichar2 *name)
3454 {
3455         gchar *utf8_name;
3456         gint result;
3457
3458         if (name == NULL) {
3459                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
3460
3461                 mono_w32error_set_last (ERROR_INVALID_NAME);
3462                 return(FALSE);
3463         }
3464
3465         utf8_name = mono_unicode_to_external (name);
3466         if (utf8_name == NULL) {
3467                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3468
3469                 mono_w32error_set_last (ERROR_INVALID_NAME);
3470                 return FALSE;
3471         }
3472
3473         result = _wapi_rmdir (utf8_name);
3474         if (result == -1) {
3475                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3476                 g_free (utf8_name);
3477
3478                 return(FALSE);
3479         }
3480         g_free (utf8_name);
3481
3482         return(TRUE);
3483 }
3484
3485 guint32
3486 mono_w32file_get_attributes (const gunichar2 *name)
3487 {
3488         gchar *utf8_name;
3489         struct stat buf, linkbuf;
3490         gint result;
3491         guint32 ret;
3492
3493         if (name == NULL) {
3494                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
3495
3496                 mono_w32error_set_last (ERROR_INVALID_NAME);
3497                 return(FALSE);
3498         }
3499
3500         utf8_name = mono_unicode_to_external (name);
3501         if (utf8_name == NULL) {
3502                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3503
3504                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
3505                 return (INVALID_FILE_ATTRIBUTES);
3506         }
3507
3508         result = _wapi_stat (utf8_name, &buf);
3509         if (result == -1 && (errno == ENOENT || errno == ELOOP)) {
3510                 /* Might be a dangling symlink... */
3511                 result = _wapi_lstat (utf8_name, &buf);
3512         }
3513
3514         if (result != 0) {
3515                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3516                 g_free (utf8_name);
3517                 return (INVALID_FILE_ATTRIBUTES);
3518         }
3519
3520         result = _wapi_lstat (utf8_name, &linkbuf);
3521         if (result != 0) {
3522                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3523                 g_free (utf8_name);
3524                 return (INVALID_FILE_ATTRIBUTES);
3525         }
3526
3527         ret = _wapi_stat_to_file_attributes (utf8_name, &buf, &linkbuf);
3528
3529         g_free (utf8_name);
3530
3531         return(ret);
3532 }
3533
3534 gboolean
3535 mono_w32file_get_attributes_ex (const gunichar2 *name, MonoIOStat *stat)
3536 {
3537         gchar *utf8_name;
3538
3539         struct stat buf, linkbuf;
3540         gint result;
3541
3542         if (name == NULL) {
3543                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
3544
3545                 mono_w32error_set_last (ERROR_INVALID_NAME);
3546                 return(FALSE);
3547         }
3548
3549         utf8_name = mono_unicode_to_external (name);
3550         if (utf8_name == NULL) {
3551                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3552
3553                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
3554                 return FALSE;
3555         }
3556
3557         result = _wapi_stat (utf8_name, &buf);
3558         if (result == -1 && errno == ENOENT) {
3559                 /* Might be a dangling symlink... */
3560                 result = _wapi_lstat (utf8_name, &buf);
3561         }
3562
3563         if (result != 0) {
3564                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3565                 g_free (utf8_name);
3566                 return FALSE;
3567         }
3568
3569         result = _wapi_lstat (utf8_name, &linkbuf);
3570         if (result != 0) {
3571                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3572                 g_free (utf8_name);
3573                 return(FALSE);
3574         }
3575
3576         /* fill stat block */
3577
3578         stat->attributes = _wapi_stat_to_file_attributes (utf8_name, &buf, &linkbuf);
3579         stat->length = (stat->attributes & FILE_ATTRIBUTE_DIRECTORY) ? 0 : buf.st_size;
3580
3581 #if HAVE_STRUCT_STAT_ST_ATIMESPEC
3582         if (linkbuf.st_mtimespec.tv_sec < linkbuf.st_ctimespec.tv_sec || (linkbuf.st_mtimespec.tv_sec == linkbuf.st_ctimespec.tv_sec && linkbuf.st_mtimespec.tv_nsec < linkbuf.st_ctimespec.tv_nsec))
3583                 stat->creation_time = linkbuf.st_mtimespec.tv_sec * TICKS_PER_SECOND + (linkbuf.st_mtimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3584         else
3585                 stat->creation_time = linkbuf.st_ctimespec.tv_sec * TICKS_PER_SECOND + (linkbuf.st_ctimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3586
3587         stat->last_access_time = linkbuf.st_atimespec.tv_sec * TICKS_PER_SECOND + (linkbuf.st_atimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3588         stat->last_write_time = linkbuf.st_mtimespec.tv_sec * TICKS_PER_SECOND + (linkbuf.st_mtimespec.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3589 #elif HAVE_STRUCT_STAT_ST_ATIM
3590         if (linkbuf.st_mtime < linkbuf.st_ctime || (linkbuf.st_mtime == linkbuf.st_ctime && linkbuf.st_mtim.tv_nsec < linkbuf.st_ctim.tv_nsec))
3591                 stat->creation_time = linkbuf.st_mtime * TICKS_PER_SECOND + (linkbuf.st_mtim.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3592         else
3593                 stat->creation_time = linkbuf.st_ctime * TICKS_PER_SECOND + (linkbuf.st_ctim.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3594
3595         stat->last_access_time = linkbuf.st_atime * TICKS_PER_SECOND + (linkbuf.st_atim.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3596         stat->last_write_time = linkbuf.st_mtime * TICKS_PER_SECOND + (linkbuf.st_mtim.tv_nsec / NANOSECONDS_PER_MICROSECOND) * TICKS_PER_MICROSECOND + CONVERT_BASE;
3597 #else
3598         stat->creation_time = (((guint64) (linkbuf.st_mtime < linkbuf.st_ctime ? linkbuf.st_mtime : linkbuf.st_ctime)) * TICKS_PER_SECOND) + CONVERT_BASE;
3599         stat->last_access_time = (((guint64) (linkbuf.st_atime)) * TICKS_PER_SECOND) + CONVERT_BASE;
3600         stat->last_write_time = (((guint64) (linkbuf.st_mtime)) * TICKS_PER_SECOND) + CONVERT_BASE;
3601 #endif
3602
3603         g_free (utf8_name);
3604         return TRUE;
3605 }
3606
3607 gboolean
3608 mono_w32file_set_attributes (const gunichar2 *name, guint32 attrs)
3609 {
3610         /* FIXME: think of something clever to do on unix */
3611         gchar *utf8_name;
3612         struct stat buf;
3613         gint result;
3614
3615         /*
3616          * Currently we only handle one *internal* case, with a value that is
3617          * not standard: 0x80000000, which means `set executable bit'
3618          */
3619
3620         if (name == NULL) {
3621                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: name is NULL", __func__);
3622
3623                 mono_w32error_set_last (ERROR_INVALID_NAME);
3624                 return(FALSE);
3625         }
3626
3627         utf8_name = mono_unicode_to_external (name);
3628         if (utf8_name == NULL) {
3629                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
3630
3631                 mono_w32error_set_last (ERROR_INVALID_NAME);
3632                 return FALSE;
3633         }
3634
3635         result = _wapi_stat (utf8_name, &buf);
3636         if (result == -1 && errno == ENOENT) {
3637                 /* Might be a dangling symlink... */
3638                 result = _wapi_lstat (utf8_name, &buf);
3639         }
3640
3641         if (result != 0) {
3642                 _wapi_set_last_path_error_from_errno (NULL, utf8_name);
3643                 g_free (utf8_name);
3644                 return FALSE;
3645         }
3646
3647         /* Contrary to the documentation, ms allows NORMAL to be
3648          * specified along with other attributes, so dont bother to
3649          * catch that case here.
3650          */
3651         if (attrs & FILE_ATTRIBUTE_READONLY) {
3652                 result = _wapi_chmod (utf8_name, buf.st_mode & ~(S_IWUSR | S_IWOTH | S_IWGRP));
3653         } else {
3654                 result = _wapi_chmod (utf8_name, buf.st_mode | S_IWUSR);
3655         }
3656
3657         /* Ignore the other attributes for now */
3658
3659         if (attrs & 0x80000000){
3660                 mode_t exec_mask = 0;
3661
3662                 if ((buf.st_mode & S_IRUSR) != 0)
3663                         exec_mask |= S_IXUSR;
3664
3665                 if ((buf.st_mode & S_IRGRP) != 0)
3666                         exec_mask |= S_IXGRP;
3667
3668                 if ((buf.st_mode & S_IROTH) != 0)
3669                         exec_mask |= S_IXOTH;
3670
3671                 MONO_ENTER_GC_SAFE;
3672                 result = chmod (utf8_name, buf.st_mode | exec_mask);
3673                 MONO_EXIT_GC_SAFE;
3674         }
3675         /* Don't bother to reset executable (might need to change this
3676          * policy)
3677          */
3678
3679         g_free (utf8_name);
3680
3681         return(TRUE);
3682 }
3683
3684 guint32
3685 mono_w32file_get_cwd (guint32 length, gunichar2 *buffer)
3686 {
3687         gunichar2 *utf16_path;
3688         glong count;
3689         gsize bytes;
3690
3691         if (getcwd ((gchar*)buffer, length) == NULL) {
3692                 if (errno == ERANGE) { /*buffer length is not big enough */
3693                         gchar *path = g_get_current_dir (); /*FIXME g_get_current_dir doesn't work with broken paths and calling it just to know the path length is silly*/
3694                         if (path == NULL)
3695                                 return 0;
3696                         utf16_path = mono_unicode_from_external (path, &bytes);
3697                         g_free (utf16_path);
3698                         g_free (path);
3699                         return (bytes/2)+1;
3700                 }
3701                 _wapi_set_last_error_from_errno ();
3702                 return 0;
3703         }
3704
3705         utf16_path = mono_unicode_from_external ((gchar*)buffer, &bytes);
3706         count = (bytes/2)+1;
3707         g_assert (count <= length); /*getcwd must have failed before with ERANGE*/
3708
3709         /* Add the terminator */
3710         memset (buffer, '\0', bytes+2);
3711         memcpy (buffer, utf16_path, bytes);
3712
3713         g_free (utf16_path);
3714
3715         return count;
3716 }
3717
3718 gboolean
3719 mono_w32file_set_cwd (const gunichar2 *path)
3720 {
3721         gchar *utf8_path;
3722         gboolean result;
3723
3724         if (path == NULL) {
3725                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
3726                 return(FALSE);
3727         }
3728
3729         utf8_path = mono_unicode_to_external (path);
3730         if (_wapi_chdir (utf8_path) != 0) {
3731                 _wapi_set_last_error_from_errno ();
3732                 result = FALSE;
3733         }
3734         else
3735                 result = TRUE;
3736
3737         g_free (utf8_path);
3738         return result;
3739 }
3740
3741 gboolean
3742 mono_w32file_create_pipe (gpointer *readpipe, gpointer *writepipe, guint32 size)
3743 {
3744         FileHandle *read_filehandle, *write_filehandle;
3745         gint filedes[2];
3746         gint ret;
3747
3748         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Creating pipe", __func__);
3749
3750         MONO_ENTER_GC_SAFE;
3751         ret=pipe (filedes);
3752         MONO_EXIT_GC_SAFE;
3753         if (ret==-1) {
3754                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Error creating pipe: (%d) %s",
3755                         __func__, errno, g_strerror (errno));
3756
3757                 _wapi_set_last_error_from_errno ();
3758                 return FALSE;
3759         }
3760
3761         /* filedes[0] is open for reading, filedes[1] for writing */
3762
3763         read_filehandle = file_data_create (MONO_FDTYPE_PIPE, filedes[0]);
3764         read_filehandle->fileaccess = GENERIC_READ;
3765
3766         write_filehandle = file_data_create (MONO_FDTYPE_PIPE, filedes[1]);
3767         write_filehandle->fileaccess = GENERIC_WRITE;
3768
3769         mono_fdhandle_insert ((MonoFDHandle*) read_filehandle);
3770         mono_fdhandle_insert ((MonoFDHandle*) write_filehandle);
3771
3772         *readpipe = GINT_TO_POINTER(((MonoFDHandle*) read_filehandle)->fd);
3773         *writepipe = GINT_TO_POINTER(((MonoFDHandle*) write_filehandle)->fd);
3774
3775         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Returning pipe: read handle %p, write handle %p",
3776                 __func__, GINT_TO_POINTER(((MonoFDHandle*) read_filehandle)->fd), GINT_TO_POINTER(((MonoFDHandle*) write_filehandle)->fd));
3777
3778         return(TRUE);
3779 }
3780
3781 #ifdef HAVE_GETFSSTAT
3782 /* Darwin has getfsstat */
3783 gint32
3784 mono_w32file_get_logical_drive (guint32 len, gunichar2 *buf)
3785 {
3786         struct statfs *stats;
3787         gint size, n, i;
3788         gunichar2 *dir;
3789         glong length, total = 0;
3790         gint syscall_res;
3791
3792         MONO_ENTER_GC_SAFE;
3793         n = getfsstat (NULL, 0, MNT_NOWAIT);
3794         MONO_EXIT_GC_SAFE;
3795         if (n == -1)
3796                 return 0;
3797         size = n * sizeof (struct statfs);
3798         stats = (struct statfs *) g_malloc (size);
3799         if (stats == NULL)
3800                 return 0;
3801         MONO_ENTER_GC_SAFE;
3802         syscall_res = getfsstat (stats, size, MNT_NOWAIT);
3803         MONO_EXIT_GC_SAFE;
3804         if (syscall_res == -1){
3805                 g_free (stats);
3806                 return 0;
3807         }
3808         for (i = 0; i < n; i++){
3809                 dir = g_utf8_to_utf16 (stats [i].f_mntonname, -1, NULL, &length, NULL);
3810                 if (total + length < len){
3811                         memcpy (buf + total, dir, sizeof (gunichar2) * length);
3812                         buf [total+length] = 0;
3813                 }
3814                 g_free (dir);
3815                 total += length + 1;
3816         }
3817         if (total < len)
3818                 buf [total] = 0;
3819         total++;
3820         g_free (stats);
3821         return total;
3822 }
3823 #elif _AIX
3824 gint32
3825 mono_w32file_get_logical_drive (guint32 len, gunichar2 *buf)
3826 {
3827         struct vmount *mounts;
3828         // ret will first be the errno cond, then no of structs
3829         int needsize, ret, total;
3830         gunichar2 *dir;
3831         glong length;
3832         total = 0;
3833
3834         MONO_ENTER_GC_SAFE;
3835         ret = mntctl (MCTL_QUERY, sizeof(needsize), &needsize);
3836         MONO_EXIT_GC_SAFE;
3837         if (ret == -1)
3838                 return 0;
3839         mounts = (struct vmount *) g_malloc (needsize);
3840         if (mounts == NULL)
3841                 return 0;
3842         MONO_ENTER_GC_SAFE;
3843         ret = mntctl (MCTL_QUERY, needsize, mounts);
3844         MONO_EXIT_GC_SAFE;
3845         if (ret == -1) {
3846                 g_free (mounts);
3847                 return 0;
3848         }
3849
3850         for (int i = 0; i < ret; i++) {
3851                 dir = g_utf8_to_utf16 (vmt2dataptr(mounts, VMT_STUB), -1, NULL, &length, NULL);
3852                 if (total + length < len){
3853                         memcpy (buf + total, dir, sizeof (gunichar2) * length);
3854                         buf [total+length] = 0;
3855                 }
3856                 g_free (dir);
3857                 total += length + 1;
3858                 mounts = (void*)mounts + mounts->vmt_length; // next!
3859         }
3860         if (total < len)
3861                 buf [total] = 0;
3862         total++;
3863         g_free (mounts);
3864         return total;
3865 }
3866 #else
3867 /* In-place octal sequence replacement */
3868 static void
3869 unescape_octal (gchar *str)
3870 {
3871         gchar *rptr;
3872         gchar *wptr;
3873
3874         if (str == NULL)
3875                 return;
3876
3877         rptr = wptr = str;
3878         while (*rptr != '\0') {
3879                 if (*rptr == '\\') {
3880                         gchar c;
3881                         rptr++;
3882                         c = (*(rptr++) - '0') << 6;
3883                         c += (*(rptr++) - '0') << 3;
3884                         c += *(rptr++) - '0';
3885                         *wptr++ = c;
3886                 } else if (wptr != rptr) {
3887                         *wptr++ = *rptr++;
3888                 } else {
3889                         rptr++; wptr++;
3890                 }
3891         }
3892         *wptr = '\0';
3893 }
3894 static gint32 GetLogicalDriveStrings_Mtab (guint32 len, gunichar2 *buf);
3895
3896 #if __linux__
3897 #define GET_LOGICAL_DRIVE_STRINGS_BUFFER 512
3898 #define GET_LOGICAL_DRIVE_STRINGS_MOUNTPOINT_BUFFER 512
3899 #define GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER 64
3900
3901 typedef struct
3902 {
3903         glong total;
3904         guint32 buffer_index;
3905         guint32 mountpoint_index;
3906         guint32 field_number;
3907         guint32 allocated_size;
3908         guint32 fsname_index;
3909         guint32 fstype_index;
3910         gchar mountpoint [GET_LOGICAL_DRIVE_STRINGS_MOUNTPOINT_BUFFER + 1];
3911         gchar *mountpoint_allocated;
3912         gchar buffer [GET_LOGICAL_DRIVE_STRINGS_BUFFER];
3913         gchar fsname [GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER + 1];
3914         gchar fstype [GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER + 1];
3915         ssize_t nbytes;
3916         gchar delimiter;
3917         gboolean check_mount_source;
3918 } LinuxMountInfoParseState;
3919
3920 static gboolean GetLogicalDriveStrings_Mounts (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state);
3921 static gboolean GetLogicalDriveStrings_MountInfo (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state);
3922 static void append_to_mountpoint (LinuxMountInfoParseState *state);
3923 static gboolean add_drive_string (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state);
3924
3925 gint32
3926 mono_w32file_get_logical_drive (guint32 len, gunichar2 *buf)
3927 {
3928         gint fd;
3929         gint32 ret = 0;
3930         LinuxMountInfoParseState state;
3931         gboolean (*parser)(guint32, gunichar2*, LinuxMountInfoParseState*) = NULL;
3932
3933         memset (buf, 0, len * sizeof (gunichar2));
3934         MONO_ENTER_GC_SAFE;
3935         fd = open ("/proc/self/mountinfo", O_RDONLY);
3936         MONO_EXIT_GC_SAFE;
3937         if (fd != -1)
3938                 parser = GetLogicalDriveStrings_MountInfo;
3939         else {
3940                 MONO_ENTER_GC_SAFE;
3941                 fd = open ("/proc/mounts", O_RDONLY);
3942                 MONO_EXIT_GC_SAFE;
3943                 if (fd != -1)
3944                         parser = GetLogicalDriveStrings_Mounts;
3945         }
3946
3947         if (!parser) {
3948                 ret = GetLogicalDriveStrings_Mtab (len, buf);
3949                 goto done_and_out;
3950         }
3951
3952         memset (&state, 0, sizeof (LinuxMountInfoParseState));
3953         state.field_number = 1;
3954         state.delimiter = ' ';
3955
3956         while (1) {
3957                 MONO_ENTER_GC_SAFE;
3958                 state.nbytes = read (fd, state.buffer, GET_LOGICAL_DRIVE_STRINGS_BUFFER);
3959                 MONO_EXIT_GC_SAFE;
3960                 if (!(state.nbytes > 0))
3961                         break;
3962                 state.buffer_index = 0;
3963
3964                 while ((*parser)(len, buf, &state)) {
3965                         if (state.buffer [state.buffer_index] == '\n') {
3966                                 gboolean quit = add_drive_string (len, buf, &state);
3967                                 state.field_number = 1;
3968                                 state.buffer_index++;
3969                                 if (state.mountpoint_allocated) {
3970                                         g_free (state.mountpoint_allocated);
3971                                         state.mountpoint_allocated = NULL;
3972                                 }
3973                                 if (quit) {
3974                                         ret = state.total;
3975                                         goto done_and_out;
3976                                 }
3977                         }
3978                 }
3979         };
3980         ret = state.total;
3981
3982   done_and_out:
3983         if (fd != -1) {
3984                 MONO_ENTER_GC_SAFE;
3985                 close (fd);
3986                 MONO_EXIT_GC_SAFE;
3987         }
3988         return ret;
3989 }
3990
3991 static gboolean GetLogicalDriveStrings_Mounts (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state)
3992 {
3993         gchar *ptr;
3994
3995         if (state->field_number == 1)
3996                 state->check_mount_source = TRUE;
3997
3998         while (state->buffer_index < (guint32)state->nbytes) {
3999                 if (state->buffer [state->buffer_index] == state->delimiter) {
4000                         state->field_number++;
4001                         switch (state->field_number) {
4002                                 case 2:
4003                                         state->mountpoint_index = 0;
4004                                         break;
4005
4006                                 case 3:
4007                                         if (state->mountpoint_allocated)
4008                                                 state->mountpoint_allocated [state->mountpoint_index] = 0;
4009                                         else
4010                                                 state->mountpoint [state->mountpoint_index] = 0;
4011                                         break;
4012
4013                                 default:
4014                                         ptr = (gchar*)memchr (state->buffer + state->buffer_index, '\n', GET_LOGICAL_DRIVE_STRINGS_BUFFER - state->buffer_index);
4015                                         if (ptr)
4016                                                 state->buffer_index = (ptr - (gchar*)state->buffer) - 1;
4017                                         else
4018                                                 state->buffer_index = state->nbytes;
4019                                         return TRUE;
4020                         }
4021                         state->buffer_index++;
4022                         continue;
4023                 } else if (state->buffer [state->buffer_index] == '\n')
4024                         return TRUE;
4025
4026                 switch (state->field_number) {
4027                         case 1:
4028                                 if (state->check_mount_source) {
4029                                         if (state->fsname_index == 0 && state->buffer [state->buffer_index] == '/') {
4030                                                 /* We can ignore the rest, it's a device
4031                                                  * path */
4032                                                 state->check_mount_source = FALSE;
4033                                                 state->fsname [state->fsname_index++] = '/';
4034                                                 break;
4035                                         }
4036                                         if (state->fsname_index < GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER)
4037                                                 state->fsname [state->fsname_index++] = state->buffer [state->buffer_index];
4038                                 }
4039                                 break;
4040
4041                         case 2:
4042                                 append_to_mountpoint (state);
4043                                 break;
4044
4045                         case 3:
4046                                 if (state->fstype_index < GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER)
4047                                         state->fstype [state->fstype_index++] = state->buffer [state->buffer_index];
4048                                 break;
4049                 }
4050
4051                 state->buffer_index++;
4052         }
4053
4054         return FALSE;
4055 }
4056
4057 static gboolean GetLogicalDriveStrings_MountInfo (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state)
4058 {
4059         while (state->buffer_index < (guint32)state->nbytes) {
4060                 if (state->buffer [state->buffer_index] == state->delimiter) {
4061                         state->field_number++;
4062                         switch (state->field_number) {
4063                                 case 5:
4064                                         state->mountpoint_index = 0;
4065                                         break;
4066
4067                                 case 6:
4068                                         if (state->mountpoint_allocated)
4069                                                 state->mountpoint_allocated [state->mountpoint_index] = 0;
4070                                         else
4071                                                 state->mountpoint [state->mountpoint_index] = 0;
4072                                         break;
4073
4074                                 case 7:
4075                                         state->delimiter = '-';
4076                                         break;
4077
4078                                 case 8:
4079                                         state->delimiter = ' ';
4080                                         break;
4081
4082                                 case 10:
4083                                         state->check_mount_source = TRUE;
4084                                         break;
4085                         }
4086                         state->buffer_index++;
4087                         continue;
4088                 } else if (state->buffer [state->buffer_index] == '\n')
4089                         return TRUE;
4090
4091                 switch (state->field_number) {
4092                         case 5:
4093                                 append_to_mountpoint (state);
4094                                 break;
4095
4096                         case 9:
4097                                 if (state->fstype_index < GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER)
4098                                         state->fstype [state->fstype_index++] = state->buffer [state->buffer_index];
4099                                 break;
4100
4101                         case 10:
4102                                 if (state->check_mount_source) {
4103                                         if (state->fsname_index == 0 && state->buffer [state->buffer_index] == '/') {
4104                                                 /* We can ignore the rest, it's a device
4105                                                  * path */
4106                                                 state->check_mount_source = FALSE;
4107                                                 state->fsname [state->fsname_index++] = '/';
4108                                                 break;
4109                                         }
4110                                         if (state->fsname_index < GET_LOGICAL_DRIVE_STRINGS_FSNAME_BUFFER)
4111                                                 state->fsname [state->fsname_index++] = state->buffer [state->buffer_index];
4112                                 }
4113                                 break;
4114                 }
4115
4116                 state->buffer_index++;
4117         }
4118
4119         return FALSE;
4120 }
4121
4122 static void
4123 append_to_mountpoint (LinuxMountInfoParseState *state)
4124 {
4125         gchar ch = state->buffer [state->buffer_index];
4126         if (state->mountpoint_allocated) {
4127                 if (state->mountpoint_index >= state->allocated_size) {
4128                         guint32 newsize = (state->allocated_size << 1) + 1;
4129                         gchar *newbuf = (gchar *)g_malloc0 (newsize * sizeof (gchar));
4130
4131                         memcpy (newbuf, state->mountpoint_allocated, state->mountpoint_index);
4132                         g_free (state->mountpoint_allocated);
4133                         state->mountpoint_allocated = newbuf;
4134                         state->allocated_size = newsize;
4135                 }
4136                 state->mountpoint_allocated [state->mountpoint_index++] = ch;
4137         } else {
4138                 if (state->mountpoint_index >= GET_LOGICAL_DRIVE_STRINGS_MOUNTPOINT_BUFFER) {
4139                         state->allocated_size = (state->mountpoint_index << 1) + 1;
4140                         state->mountpoint_allocated = (gchar *)g_malloc0 (state->allocated_size * sizeof (gchar));
4141                         memcpy (state->mountpoint_allocated, state->mountpoint, state->mountpoint_index);
4142                         state->mountpoint_allocated [state->mountpoint_index++] = ch;
4143                 } else
4144                         state->mountpoint [state->mountpoint_index++] = ch;
4145         }
4146 }
4147
4148 static gboolean
4149 add_drive_string (guint32 len, gunichar2 *buf, LinuxMountInfoParseState *state)
4150 {
4151         gboolean quit = FALSE;
4152         gboolean ignore_entry;
4153
4154         if (state->fsname_index == 1 && state->fsname [0] == '/')
4155                 ignore_entry = FALSE;
4156         else if (memcmp ("overlay", state->fsname, state->fsname_index) == 0 ||
4157                 memcmp ("aufs", state->fstype, state->fstype_index) == 0) {
4158                 /* Don't ignore overlayfs and aufs - these might be used on Docker
4159                  * (https://bugzilla.xamarin.com/show_bug.cgi?id=31021) */
4160                 ignore_entry = FALSE;
4161         } else if (state->fsname_index == 0 || memcmp ("none", state->fsname, state->fsname_index) == 0) {
4162                 ignore_entry = TRUE;
4163         } else if (state->fstype_index >= 5 && memcmp ("fuse.", state->fstype, 5) == 0) {
4164                 /* Ignore GNOME's gvfs */
4165                 if (state->fstype_index == 21 && memcmp ("fuse.gvfs-fuse-daemon", state->fstype, state->fstype_index) == 0)
4166                         ignore_entry = TRUE;
4167                 else
4168                         ignore_entry = FALSE;
4169         } else if (state->fstype_index == 3 && memcmp ("nfs", state->fstype, state->fstype_index) == 0)
4170                 ignore_entry = FALSE;
4171         else
4172                 ignore_entry = TRUE;
4173
4174         if (!ignore_entry) {
4175                 gunichar2 *dir;
4176                 glong length;
4177                 gchar *mountpoint = state->mountpoint_allocated ? state->mountpoint_allocated : state->mountpoint;
4178
4179                 unescape_octal (mountpoint);
4180                 dir = g_utf8_to_utf16 (mountpoint, -1, NULL, &length, NULL);
4181                 if (state->total + length + 1 > len) {
4182                         quit = TRUE;
4183                         state->total = len * 2;
4184                 } else {
4185                         length++;
4186                         memcpy (buf + state->total, dir, sizeof (gunichar2) * length);
4187                         state->total += length;
4188                 }
4189                 g_free (dir);
4190         }
4191         state->fsname_index = 0;
4192         state->fstype_index = 0;
4193
4194         return quit;
4195 }
4196 #else
4197 gint32
4198 mono_w32file_get_logical_drive (guint32 len, gunichar2 *buf)
4199 {
4200         return GetLogicalDriveStrings_Mtab (len, buf);
4201 }
4202 #endif
4203 static gint32
4204 GetLogicalDriveStrings_Mtab (guint32 len, gunichar2 *buf)
4205 {
4206         FILE *fp;
4207         gunichar2 *ptr, *dir;
4208         glong length, total = 0;
4209         gchar buffer [512];
4210         gchar **splitted;
4211
4212         memset (buf, 0, sizeof (gunichar2) * (len + 1));
4213         buf [0] = '/';
4214         buf [1] = 0;
4215         buf [2] = 0;
4216
4217         /* Sigh, mntent and friends don't work well.
4218          * It stops on the first line that doesn't begin with a '/'.
4219          * (linux 2.6.5, libc 2.3.2.ds1-12) - Gonz */
4220         MONO_ENTER_GC_SAFE;
4221         fp = fopen ("/etc/mtab", "rt");
4222         MONO_EXIT_GC_SAFE;
4223         if (fp == NULL) {
4224                 MONO_ENTER_GC_SAFE;
4225                 fp = fopen ("/etc/mnttab", "rt");
4226                 MONO_EXIT_GC_SAFE;
4227                 if (fp == NULL)
4228                         return 1;
4229         }
4230
4231         ptr = buf;
4232         while (1) {
4233                 gchar *fgets_res;
4234                 MONO_ENTER_GC_SAFE;
4235                 fgets_res = fgets (buffer, 512, fp);
4236                 MONO_EXIT_GC_SAFE;
4237                 if (!fgets_res)
4238                         break;
4239                 if (*buffer != '/')
4240                         continue;
4241
4242                 splitted = g_strsplit (buffer, " ", 0);
4243                 if (!*splitted || !*(splitted + 1)) {
4244                         g_strfreev (splitted);
4245                         continue;
4246                 }
4247
4248                 unescape_octal (*(splitted + 1));
4249                 dir = g_utf8_to_utf16 (*(splitted + 1), -1, NULL, &length, NULL);
4250                 g_strfreev (splitted);
4251                 if (total + length + 1 > len) {
4252                         MONO_ENTER_GC_SAFE;
4253                         fclose (fp);
4254                         MONO_EXIT_GC_SAFE;
4255                         g_free (dir);
4256                         return len * 2; /* guess */
4257                 }
4258
4259                 memcpy (ptr + total, dir, sizeof (gunichar2) * length);
4260                 g_free (dir);
4261                 total += length + 1;
4262         }
4263
4264         MONO_ENTER_GC_SAFE;
4265         fclose (fp);
4266         MONO_EXIT_GC_SAFE;
4267         return total;
4268 /* Commented out, does not work with my mtab!!! - Gonz */
4269 #ifdef NOTENABLED /* HAVE_MNTENT_H */
4270 {
4271         FILE *fp;
4272         struct mntent *mnt;
4273         gunichar2 *ptr, *dir;
4274         glong len, total = 0;
4275
4276
4277         MONO_ENTER_GC_SAFE;
4278         fp = setmntent ("/etc/mtab", "rt");
4279         MONO_EXIT_GC_SAFE;
4280         if (fp == NULL) {
4281                 MONO_ENTER_GC_SAFE;
4282                 fp = setmntent ("/etc/mnttab", "rt");
4283                 MONO_EXIT_GC_SAFE;
4284                 if (fp == NULL)
4285                         return;
4286         }
4287
4288         ptr = buf;
4289         while (1) {
4290                 MONO_ENTER_GC_SAFE;
4291                 mnt = getmntent (fp);
4292                 MONO_EXIT_GC_SAFE;
4293                 if (mnt == NULL)
4294                         break;
4295                 g_print ("GOT %s\n", mnt->mnt_dir);
4296                 dir = g_utf8_to_utf16 (mnt->mnt_dir, &len, NULL, NULL, NULL);
4297                 if (total + len + 1 > len) {
4298                         MONO_ENTER_GC_SAFE;
4299                         endmntent (fp);
4300                         MONO_EXIT_GC_SAFE;
4301                         return len * 2; /* guess */
4302                 }
4303
4304                 memcpy (ptr + total, dir, sizeof (gunichar2) * len);
4305                 g_free (dir);
4306                 total += len + 1;
4307         }
4308
4309         MONO_ENTER_GC_SAFE;
4310         endmntent (fp);
4311         MONO_EXIT_GC_SAFE;
4312         return total;
4313 }
4314 #endif
4315 }
4316 #endif
4317
4318 #ifndef PLATFORM_NO_DRIVEINFO
4319 gboolean
4320 mono_w32file_get_disk_free_space (const gunichar2 *path_name, guint64 *free_bytes_avail, guint64 *total_number_of_bytes, guint64 *total_number_of_free_bytes)
4321 {
4322         g_assert (free_bytes_avail);
4323         g_assert (total_number_of_bytes);
4324         g_assert (total_number_of_free_bytes);
4325
4326 #if defined(HAVE_STATVFS) || defined(HAVE_STATFS)
4327 #ifdef HAVE_STATVFS
4328         struct statvfs fsstat;
4329 #elif defined(HAVE_STATFS)
4330         struct statfs fsstat;
4331 #endif
4332         gboolean isreadonly;
4333         gchar *utf8_path_name;
4334         gint ret;
4335         unsigned long block_size;
4336
4337         if (path_name == NULL) {
4338                 utf8_path_name = g_strdup (g_get_current_dir());
4339                 if (utf8_path_name == NULL) {
4340                         mono_w32error_set_last (ERROR_DIRECTORY);
4341                         return(FALSE);
4342                 }
4343         }
4344         else {
4345                 utf8_path_name = mono_unicode_to_external (path_name);
4346                 if (utf8_path_name == NULL) {
4347                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
4348
4349                         mono_w32error_set_last (ERROR_INVALID_NAME);
4350                         return(FALSE);
4351                 }
4352         }
4353
4354         do {
4355 #ifdef HAVE_STATVFS
4356                 MONO_ENTER_GC_SAFE;
4357                 ret = statvfs (utf8_path_name, &fsstat);
4358                 MONO_EXIT_GC_SAFE;
4359                 isreadonly = ((fsstat.f_flag & ST_RDONLY) == ST_RDONLY);
4360                 block_size = fsstat.f_frsize;
4361 #elif defined(HAVE_STATFS)
4362                 MONO_ENTER_GC_SAFE;
4363                 ret = statfs (utf8_path_name, &fsstat);
4364                 MONO_EXIT_GC_SAFE;
4365 #if defined (MNT_RDONLY)
4366                 isreadonly = ((fsstat.f_flags & MNT_RDONLY) == MNT_RDONLY);
4367 #elif defined (MS_RDONLY)
4368                 isreadonly = ((fsstat.f_flags & MS_RDONLY) == MS_RDONLY);
4369 #endif
4370                 block_size = fsstat.f_bsize;
4371 #endif
4372         } while(ret == -1 && errno == EINTR);
4373
4374         g_free(utf8_path_name);
4375
4376         if (ret == -1) {
4377                 _wapi_set_last_error_from_errno ();
4378                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: statvfs failed: %s", __func__, g_strerror (errno));
4379                 return(FALSE);
4380         }
4381
4382         /* total number of free bytes for non-root */
4383         if (isreadonly)
4384                 *free_bytes_avail = 0;
4385         else
4386                 *free_bytes_avail = block_size * (guint64)fsstat.f_bavail;
4387
4388         /* total number of bytes available for non-root */
4389         *total_number_of_bytes = block_size * (guint64)fsstat.f_blocks;
4390
4391         /* total number of bytes available for root */
4392         if (isreadonly)
4393                 *total_number_of_free_bytes = 0;
4394         else
4395                 *total_number_of_free_bytes = block_size * (guint64)fsstat.f_bfree;
4396 #endif
4397         return(TRUE);
4398 }
4399 #endif // PLATFORM_NO_DRIVEINFO
4400
4401 /*
4402  * General Unix support
4403  */
4404 typedef struct {
4405         guint32 drive_type;
4406 #if __linux__
4407         // http://man7.org/linux/man-pages/man2/statfs.2.html
4408         //
4409         // The __fsword_t type used for various fields in the statfs structure
4410         // definition is a glibc internal type, not intended for public use.
4411         // This leaves the programmer in a bit of a conundrum when trying to
4412         // copy or compare these fields to local variables in a program.  Using
4413         // unsigned int for such variables suffices on most systems.
4414         //
4415         // Let's hope "most" is enough, and that it works with other libc.
4416         unsigned fstypeid;
4417 #endif
4418         const gchar* fstype;
4419 } _wapi_drive_type;
4420
4421 static const _wapi_drive_type _wapi_drive_types[] = {
4422 #if HOST_DARWIN
4423         { DRIVE_REMOTE, "afp" },
4424         { DRIVE_REMOTE, "afpfs" },
4425         { DRIVE_REMOTE, "autofs" },
4426         { DRIVE_CDROM, "cddafs" },
4427         { DRIVE_CDROM, "cd9660" },
4428         { DRIVE_RAMDISK, "devfs" },
4429         { DRIVE_RAMDISK, "nullfs" },
4430         { DRIVE_FIXED, "exfat" },
4431         { DRIVE_RAMDISK, "fdesc" },
4432         { DRIVE_REMOTE, "ftp" },
4433         { DRIVE_FIXED, "hfs" },
4434         { DRIVE_FIXED, "apfs" },
4435         { DRIVE_REMOTE, "kbfuse" },
4436         { DRIVE_FIXED, "msdos" },
4437         { DRIVE_REMOTE, "nfs" },
4438         { DRIVE_FIXED, "ntfs" },
4439         { DRIVE_REMOTE, "smbfs" },
4440         { DRIVE_FIXED, "udf" },
4441         { DRIVE_REMOTE, "webdav" },
4442         { DRIVE_FIXED, "ufsd_NTFS"},
4443         { DRIVE_UNKNOWN, NULL }
4444 #elif __linux__
4445         { DRIVE_FIXED, ADFS_SUPER_MAGIC, "adfs"},
4446         { DRIVE_FIXED, AFFS_SUPER_MAGIC, "affs"},
4447         { DRIVE_REMOTE, AFS_SUPER_MAGIC, "afs"},
4448         { DRIVE_RAMDISK, AUTOFS_SUPER_MAGIC, "autofs"},
4449         { DRIVE_RAMDISK, AUTOFS_SBI_MAGIC, "autofs4"},
4450         { DRIVE_REMOTE, CODA_SUPER_MAGIC, "coda" },
4451         { DRIVE_RAMDISK, CRAMFS_MAGIC, "cramfs"},
4452         { DRIVE_RAMDISK, CRAMFS_MAGIC_WEND, "cramfs"},
4453         { DRIVE_REMOTE, CIFS_MAGIC_NUMBER, "cifs"},
4454         { DRIVE_RAMDISK, DEBUGFS_MAGIC, "debugfs"},
4455         { DRIVE_RAMDISK, SYSFS_MAGIC, "sysfs"},
4456         { DRIVE_RAMDISK, SECURITYFS_MAGIC, "securityfs"},
4457         { DRIVE_RAMDISK, SELINUX_MAGIC, "selinuxfs"},
4458         { DRIVE_RAMDISK, RAMFS_MAGIC, "ramfs"},
4459         { DRIVE_FIXED, SQUASHFS_MAGIC, "squashfs"},
4460         { DRIVE_FIXED, EFS_SUPER_MAGIC, "efs"},
4461         { DRIVE_FIXED, EXT2_SUPER_MAGIC, "ext"},
4462         { DRIVE_FIXED, EXT3_SUPER_MAGIC, "ext"},
4463         { DRIVE_FIXED, EXT4_SUPER_MAGIC, "ext"},
4464         { DRIVE_REMOTE, XENFS_SUPER_MAGIC, "xenfs"},
4465         { DRIVE_FIXED, BTRFS_SUPER_MAGIC, "btrfs"},
4466         { DRIVE_FIXED, HFS_SUPER_MAGIC, "hfs"},
4467         { DRIVE_FIXED, HFSPLUS_SUPER_MAGIC, "hfsplus"},
4468         { DRIVE_FIXED, HPFS_SUPER_MAGIC, "hpfs"},
4469         { DRIVE_RAMDISK, HUGETLBFS_MAGIC, "hugetlbfs"},
4470         { DRIVE_CDROM, ISOFS_SUPER_MAGIC, "iso"},
4471         { DRIVE_FIXED, JFFS2_SUPER_MAGIC, "jffs2"},
4472         { DRIVE_RAMDISK, ANON_INODE_FS_MAGIC, "anon_inode"},
4473         { DRIVE_FIXED, JFS_SUPER_MAGIC, "jfs"},
4474         { DRIVE_FIXED, MINIX_SUPER_MAGIC, "minix"},
4475         { DRIVE_FIXED, MINIX_SUPER_MAGIC2, "minix v2"},
4476         { DRIVE_FIXED, MINIX2_SUPER_MAGIC, "minix2"},
4477         { DRIVE_FIXED, MINIX2_SUPER_MAGIC2, "minix2 v2"},
4478         { DRIVE_FIXED, MINIX3_SUPER_MAGIC, "minix3"},
4479         { DRIVE_FIXED, MSDOS_SUPER_MAGIC, "msdos"},
4480         { DRIVE_REMOTE, NCP_SUPER_MAGIC, "ncp"},
4481         { DRIVE_REMOTE, NFS_SUPER_MAGIC, "nfs"},
4482         { DRIVE_FIXED, NTFS_SB_MAGIC, "ntfs"},
4483         { DRIVE_RAMDISK, OPENPROM_SUPER_MAGIC, "openpromfs"},
4484         { DRIVE_RAMDISK, PROC_SUPER_MAGIC, "proc"},
4485         { DRIVE_FIXED, QNX4_SUPER_MAGIC, "qnx4"},
4486         { DRIVE_FIXED, REISERFS_SUPER_MAGIC, "reiserfs"},
4487         { DRIVE_RAMDISK, ROMFS_MAGIC, "romfs"},
4488         { DRIVE_REMOTE, SMB_SUPER_MAGIC, "samba"},
4489         { DRIVE_RAMDISK, CGROUP_SUPER_MAGIC, "cgroupfs"},
4490         { DRIVE_RAMDISK, FUTEXFS_SUPER_MAGIC, "futexfs"},
4491         { DRIVE_FIXED, SYSV2_SUPER_MAGIC, "sysv2"},
4492         { DRIVE_FIXED, SYSV4_SUPER_MAGIC, "sysv4"},
4493         { DRIVE_RAMDISK, TMPFS_MAGIC, "tmpfs"},
4494         { DRIVE_RAMDISK, DEVPTS_SUPER_MAGIC, "devpts"},
4495         { DRIVE_CDROM, UDF_SUPER_MAGIC, "udf"},
4496         { DRIVE_FIXED, UFS_MAGIC, "ufs"},
4497         { DRIVE_FIXED, UFS_MAGIC_BW, "ufs"},
4498         { DRIVE_FIXED, UFS2_MAGIC, "ufs2"},
4499         { DRIVE_FIXED, UFS_CIGAM, "ufs"},
4500         { DRIVE_RAMDISK, USBDEVICE_SUPER_MAGIC, "usbdev"},
4501         { DRIVE_FIXED, XENIX_SUPER_MAGIC, "xenix"},
4502         { DRIVE_FIXED, XFS_SB_MAGIC, "xfs"},
4503         { DRIVE_RAMDISK, FUSE_SUPER_MAGIC, "fuse"},
4504         { DRIVE_FIXED, V9FS_MAGIC, "9p"},
4505         { DRIVE_REMOTE, CEPH_SUPER_MAGIC, "ceph"},
4506         { DRIVE_RAMDISK, CONFIGFS_MAGIC, "configfs"},
4507         { DRIVE_RAMDISK, ECRYPTFS_SUPER_MAGIC, "eCryptfs"},
4508         { DRIVE_FIXED, EXOFS_SUPER_MAGIC, "exofs"},
4509         { DRIVE_FIXED, VXFS_SUPER_MAGIC, "vxfs"},
4510         { DRIVE_FIXED, VXFS_OLT_MAGIC, "vxfs_olt"},
4511         { DRIVE_REMOTE, GFS2_MAGIC, "gfs2"},
4512         { DRIVE_FIXED, LOGFS_MAGIC_U32, "logfs"},
4513         { DRIVE_FIXED, OCFS2_SUPER_MAGIC, "ocfs2"},
4514         { DRIVE_FIXED, OMFS_MAGIC, "omfs"},
4515         { DRIVE_FIXED, UBIFS_SUPER_MAGIC, "ubifs"},
4516         { DRIVE_UNKNOWN, 0, NULL}
4517 #else
4518         { DRIVE_RAMDISK, "ramfs"      },
4519         { DRIVE_RAMDISK, "tmpfs"      },
4520         { DRIVE_RAMDISK, "proc"       },
4521         { DRIVE_RAMDISK, "sysfs"      },
4522         { DRIVE_RAMDISK, "debugfs"    },
4523         { DRIVE_RAMDISK, "devpts"     },
4524         { DRIVE_RAMDISK, "securityfs" },
4525         { DRIVE_RAMDISK, "procfs"     }, // AIX procfs
4526         { DRIVE_RAMDISK, "namefs"     }, // AIX soft mounts
4527         { DRIVE_RAMDISK, "nullfs"     },
4528         { DRIVE_CDROM,   "iso9660"    },
4529         { DRIVE_CDROM,   "cdrfs"      }, // AIX ISO9660 CDs
4530         { DRIVE_CDROM,   "udfs"       }, // AIX UDF CDs
4531         { DRIVE_CDROM,   "QOPT"       }, // IBM i CD mount
4532         { DRIVE_FIXED,   "ext2"       },
4533         { DRIVE_FIXED,   "ext3"       },
4534         { DRIVE_FIXED,   "ext4"       },
4535         { DRIVE_FIXED,   "sysv"       },
4536         { DRIVE_FIXED,   "reiserfs"   },
4537         { DRIVE_FIXED,   "ufs"        },
4538         { DRIVE_FIXED,   "vfat"       },
4539         { DRIVE_FIXED,   "msdos"      },
4540         { DRIVE_FIXED,   "udf"        },
4541         { DRIVE_FIXED,   "hfs"        },
4542         { DRIVE_FIXED,   "hpfs"       },
4543         { DRIVE_FIXED,   "qnx4"       },
4544         { DRIVE_FIXED,   "ntfs"       },
4545         { DRIVE_FIXED,   "ntfs-3g"    },
4546         { DRIVE_FIXED,   "jfs"        }, // IBM JFS
4547         { DRIVE_FIXED,   "jfs2"       }, // IBM JFS (AIX defalt filesystem)
4548         { DRIVE_FIXED,   "EPFS"       }, // IBM i IFS (root and QOpenSys)
4549         { DRIVE_FIXED,   "EPFSP"      }, // IBM i auxiliary storage pool FS
4550         { DRIVE_FIXED,   "QSYS"       }, // IBM i native system libraries
4551         { DRIVE_FIXED,   "QDLS"       }, // IBM i legacy S/36 directories
4552         { DRIVE_REMOTE,  "smbfs"      },
4553         { DRIVE_REMOTE,  "fuse"       },
4554         { DRIVE_REMOTE,  "nfs"        },
4555         { DRIVE_REMOTE,  "nfs4"       },
4556         { DRIVE_REMOTE,  "cifs"       },
4557         { DRIVE_REMOTE,  "ncpfs"      },
4558         { DRIVE_REMOTE,  "coda"       },
4559         { DRIVE_REMOTE,  "afs"        },
4560         { DRIVE_REMOTE,  "nfs3"       },
4561         { DRIVE_REMOTE,  "stnfs"      }, // AIX "short-term" NFS
4562         { DRIVE_REMOTE,  "autofs"     }, // AIX automounter NFS
4563         { DRIVE_REMOTE,  "cachefs"    }, // AIX cached NFS
4564         { DRIVE_REMOTE,  "NFS"        }, // IBM i NFS
4565         { DRIVE_REMOTE,  "QNETC"      }, // IBM i CIFS
4566         { DRIVE_REMOTE,  "QRFS"       }, // IBM i native remote FS
4567         { DRIVE_UNKNOWN, NULL         }
4568 #endif
4569 };
4570
4571 #if __linux__
4572 static guint32 _wapi_get_drive_type(unsigned f_type)
4573 {
4574         const _wapi_drive_type *current;
4575
4576         current = &_wapi_drive_types[0];
4577         while (current->drive_type != DRIVE_UNKNOWN) {
4578                 if (current->fstypeid == f_type)
4579                         return current->drive_type;
4580                 current++;
4581         }
4582
4583         return DRIVE_UNKNOWN;
4584 }
4585 #else
4586 static guint32 _wapi_get_drive_type(const gchar* fstype)
4587 {
4588         const _wapi_drive_type *current;
4589
4590         current = &_wapi_drive_types[0];
4591         while (current->drive_type != DRIVE_UNKNOWN) {
4592                 if (strcmp (current->fstype, fstype) == 0)
4593                         return current->drive_type;
4594
4595                 current++;
4596         }
4597
4598         return DRIVE_UNKNOWN;
4599 }
4600 #endif
4601
4602 #if defined (HOST_DARWIN) || defined (__linux__) || defined (_AIX)
4603 static guint32
4604 GetDriveTypeFromPath (const gchar *utf8_root_path_name)
4605 {
4606 #if defined (_AIX)
4607         struct statvfs buf;
4608 #else
4609         struct statfs buf;
4610 #endif
4611         gint res;
4612
4613         MONO_ENTER_GC_SAFE;
4614 #if defined (_AIX)
4615         res = statvfs (utf8_root_path_name, &buf);
4616 #else
4617         res = statfs (utf8_root_path_name, &buf);
4618 #endif
4619         MONO_EXIT_GC_SAFE;
4620         if (res == -1)
4621                 return DRIVE_UNKNOWN;
4622 #if HOST_DARWIN
4623         return _wapi_get_drive_type (buf.f_fstypename);
4624 #elif defined (_AIX)
4625         return _wapi_get_drive_type (buf.f_basetype);
4626 #else
4627         return _wapi_get_drive_type (buf.f_type);
4628 #endif
4629 }
4630 #else
4631 static guint32
4632 GetDriveTypeFromPath (const gchar *utf8_root_path_name)
4633 {
4634         guint32 drive_type;
4635         FILE *fp;
4636         gchar buffer [512];
4637         gchar **splitted;
4638
4639         MONO_ENTER_GC_SAFE;
4640         fp = fopen ("/etc/mtab", "rt");
4641         MONO_EXIT_GC_SAFE;
4642         if (fp == NULL) {
4643                 MONO_ENTER_GC_SAFE;
4644                 fp = fopen ("/etc/mnttab", "rt");
4645                 MONO_EXIT_GC_SAFE;
4646                 if (fp == NULL)
4647                         return(DRIVE_UNKNOWN);
4648         }
4649
4650         drive_type = DRIVE_NO_ROOT_DIR;
4651         while (1) {
4652                 gchar *fgets_res;
4653                 MONO_ENTER_GC_SAFE;
4654                 fgets_res = fgets (buffer, 512, fp);
4655                 MONO_EXIT_GC_SAFE;
4656                 if (fgets_res == NULL)
4657                         break;
4658                 splitted = g_strsplit (buffer, " ", 0);
4659                 if (!*splitted || !*(splitted + 1) || !*(splitted + 2)) {
4660                         g_strfreev (splitted);
4661                         continue;
4662                 }
4663
4664                 /* compare given root_path_name with the one from mtab,
4665                   if length of utf8_root_path_name is zero it must be the root dir */
4666                 if (strcmp (*(splitted + 1), utf8_root_path_name) == 0 ||
4667                     (strcmp (*(splitted + 1), "/") == 0 && strlen (utf8_root_path_name) == 0)) {
4668                         drive_type = _wapi_get_drive_type (*(splitted + 2));
4669                         /* it is possible this path might be mounted again with
4670                            a known type...keep looking */
4671                         if (drive_type != DRIVE_UNKNOWN) {
4672                                 g_strfreev (splitted);
4673                                 break;
4674                         }
4675                 }
4676
4677                 g_strfreev (splitted);
4678         }
4679
4680         MONO_ENTER_GC_SAFE;
4681         fclose (fp);
4682         MONO_EXIT_GC_SAFE;
4683         return drive_type;
4684 }
4685 #endif
4686
4687 guint32
4688 ves_icall_System_IO_DriveInfo_GetDriveType (const gunichar2 *root_path_name, gint32 root_path_name_length, MonoError *error)
4689 {
4690         // FIXME Check for embedded nuls here or in managed.
4691
4692         gchar *utf8_root_path_name;
4693         guint32 drive_type;
4694
4695         if (root_path_name == NULL) {
4696                 utf8_root_path_name = g_strdup (g_get_current_dir());
4697                 if (utf8_root_path_name == NULL) {
4698                         return(DRIVE_NO_ROOT_DIR);
4699                 }
4700         }
4701         else {
4702                 utf8_root_path_name = mono_unicode_to_external (root_path_name);
4703                 if (utf8_root_path_name == NULL) {
4704                         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: unicode conversion returned NULL", __func__);
4705                         return(DRIVE_NO_ROOT_DIR);
4706                 }
4707
4708                 /* strip trailing slash for compare below */
4709                 if (g_str_has_suffix(utf8_root_path_name, "/") && utf8_root_path_name [1] != 0) {
4710                         utf8_root_path_name[strlen(utf8_root_path_name) - 1] = 0;
4711                 }
4712         }
4713         drive_type = GetDriveTypeFromPath (utf8_root_path_name);
4714         g_free (utf8_root_path_name);
4715
4716         return (drive_type);
4717 }
4718
4719 #if defined (HOST_DARWIN) || defined (__linux__) || defined(HOST_BSD) || defined(__FreeBSD_kernel__) || defined(__HAIKU__) || defined(_AIX)
4720 static gchar*
4721 get_fstypename (gchar *utfpath)
4722 {
4723 #if defined (_AIX)
4724         /* statvfs offers the FS type name, easily, no need to iterate */
4725         struct statvfs stat;
4726         gint statvfs_res;
4727
4728         MONO_ENTER_GC_SAFE;
4729         statvfs_res = statvfs (utfpath, &stat);
4730         MONO_EXIT_GC_SAFE;
4731
4732         if (statvfs_res != -1) {
4733                 return g_strdup (stat.f_basetype);
4734         }
4735
4736         return NULL;
4737 #elif defined (HOST_DARWIN) || defined (__linux__)
4738         struct statfs stat;
4739 #if __linux__
4740         const _wapi_drive_type *current;
4741 #endif
4742         gint statfs_res;
4743         MONO_ENTER_GC_SAFE;
4744         statfs_res = statfs (utfpath, &stat);
4745         MONO_EXIT_GC_SAFE;
4746         if (statfs_res == -1)
4747                 return NULL;
4748 #if HOST_DARWIN
4749         return g_strdup (stat.f_fstypename);
4750 #else
4751         current = &_wapi_drive_types[0];
4752         while (current->drive_type != DRIVE_UNKNOWN) {
4753                 if (stat.f_type == current->fstypeid)
4754                         return g_strdup (current->fstype);
4755                 current++;
4756         }
4757         return NULL;
4758 #endif
4759 #else
4760         return NULL;
4761 #endif
4762 }
4763
4764 /* Linux has struct statfs which has a different layout */
4765 gboolean
4766 mono_w32file_get_file_system_type (const gunichar2 *path, gunichar2 *fsbuffer, gint fsbuffersize)
4767 {
4768         gchar *utfpath;
4769         gchar *fstypename;
4770         gboolean status = FALSE;
4771         glong len;
4772
4773         // We only support getting the file system type
4774         if (fsbuffer == NULL)
4775                 return 0;
4776
4777         utfpath = mono_unicode_to_external (path);
4778         if ((fstypename = get_fstypename (utfpath)) != NULL){
4779                 gunichar2 *ret = g_utf8_to_utf16 (fstypename, -1, NULL, &len, NULL);
4780                 if (ret != NULL && len < fsbuffersize){
4781                         memcpy (fsbuffer, ret, len * sizeof (gunichar2));
4782                         fsbuffer [len] = 0;
4783                         status = TRUE;
4784                 }
4785                 if (ret != NULL)
4786                         g_free (ret);
4787                 g_free (fstypename);
4788         }
4789         g_free (utfpath);
4790         return status;
4791 }
4792 #endif
4793
4794 static gboolean
4795 LockFile (gpointer handle, guint32 offset_low, guint32 offset_high, guint32 length_low, guint32 length_high)
4796 {
4797         FileHandle *filehandle;
4798         gboolean ret;
4799         off_t offset, length;
4800
4801         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
4802                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
4803                 return FALSE;
4804         }
4805
4806         if (((MonoFDHandle*) filehandle)->type != MONO_FDTYPE_FILE) {
4807                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
4808                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4809                 return FALSE;
4810         }
4811
4812         if (!(filehandle->fileaccess & (GENERIC_READ | GENERIC_WRITE | GENERIC_ALL))) {
4813                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ or GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
4814                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
4815                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4816                 return FALSE;
4817         }
4818
4819 #ifdef HAVE_LARGE_FILE_SUPPORT
4820         offset = ((gint64)offset_high << 32) | offset_low;
4821         length = ((gint64)length_high << 32) | length_low;
4822
4823         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Locking fd %d, offset %" G_GINT64_FORMAT ", length %" G_GINT64_FORMAT, __func__, ((MonoFDHandle*) filehandle)->fd, (gint64) offset, (gint64) length);
4824 #else
4825         if (offset_high > 0 || length_high > 0) {
4826                 mono_w32error_set_last (ERROR_INVALID_PARAMETER);
4827                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4828                 return FALSE;
4829         }
4830
4831         offset = offset_low;
4832         length = length_low;
4833
4834         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Locking fd %d, offset %" G_GINT64_FORMAT ", length %" G_GINT64_FORMAT, __func__, ((MonoFDHandle*) filehandle)->fd, (gint64) offset, (gint64) length);
4835 #endif
4836
4837         ret = _wapi_lock_file_region (((MonoFDHandle*) filehandle)->fd, offset, length);
4838
4839         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4840         return ret;
4841 }
4842
4843 static gboolean
4844 UnlockFile (gpointer handle, guint32 offset_low, guint32 offset_high, guint32 length_low, guint32 length_high)
4845 {
4846         FileHandle *filehandle;
4847         gboolean ret;
4848         off_t offset, length;
4849
4850         if (!mono_fdhandle_lookup_and_ref(GPOINTER_TO_INT(handle), (MonoFDHandle**) &filehandle)) {
4851                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
4852                 return FALSE;
4853         }
4854
4855         if (((MonoFDHandle*) filehandle)->type != MONO_FDTYPE_FILE) {
4856                 mono_w32error_set_last (ERROR_INVALID_HANDLE);
4857                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4858                 return FALSE;
4859         }
4860
4861         if (!(filehandle->fileaccess & (GENERIC_READ | GENERIC_WRITE | GENERIC_ALL))) {
4862                 mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: fd %d doesn't have GENERIC_READ or GENERIC_WRITE access: %u", __func__, ((MonoFDHandle*) filehandle)->fd, filehandle->fileaccess);
4863                 mono_w32error_set_last (ERROR_ACCESS_DENIED);
4864                 mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4865                 return FALSE;
4866         }
4867
4868 #ifdef HAVE_LARGE_FILE_SUPPORT
4869         offset = ((gint64)offset_high << 32) | offset_low;
4870         length = ((gint64)length_high << 32) | length_low;
4871 #else
4872         offset = offset_low;
4873         length = length_low;
4874 #endif
4875         mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_FILE, "%s: Unlocking fd %d, offset %" G_GINT64_FORMAT ", length %" G_GINT64_FORMAT, __func__, ((MonoFDHandle*) filehandle)->fd, (gint64) offset, (gint64) length);
4876
4877         ret = _wapi_unlock_file_region (((MonoFDHandle*) filehandle)->fd, offset, length);
4878
4879         mono_fdhandle_unref ((MonoFDHandle*) filehandle);
4880         return ret;
4881 }
4882
4883 void
4884 mono_w32file_init (void)
4885 {
4886         MonoFDHandleCallback file_data_callbacks;
4887         memset (&file_data_callbacks, 0, sizeof (file_data_callbacks));
4888         file_data_callbacks.close = file_data_close;
4889         file_data_callbacks.destroy = file_data_destroy;
4890
4891         mono_fdhandle_register (MONO_FDTYPE_FILE, &file_data_callbacks);
4892         mono_fdhandle_register (MONO_FDTYPE_CONSOLE, &file_data_callbacks);
4893         mono_fdhandle_register (MONO_FDTYPE_PIPE, &file_data_callbacks);
4894
4895         mono_coop_mutex_init (&file_share_mutex);
4896
4897         finds = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, finds_remove);
4898         mono_coop_mutex_init (&finds_mutex);
4899
4900 #if HOST_DARWIN
4901         libc_handle = mono_dl_open ("/usr/lib/libc.dylib", 0, NULL);
4902         g_assert (libc_handle);
4903         g_free (mono_dl_symbol (libc_handle, "clonefile", (void**)&clonefile_ptr));
4904 #endif
4905
4906         if (g_hasenv ("MONO_STRICT_IO_EMULATION"))
4907                 lock_while_writing = TRUE;
4908 }
4909
4910 void
4911 mono_w32file_cleanup (void)
4912 {
4913         mono_coop_mutex_destroy (&file_share_mutex);
4914
4915         if (file_share_table)
4916                 g_hash_table_destroy (file_share_table);
4917
4918         g_hash_table_destroy (finds);
4919         mono_coop_mutex_destroy (&finds_mutex);
4920
4921 #if HOST_DARWIN
4922         mono_dl_close (libc_handle);
4923 #endif
4924 }
4925
4926 gboolean
4927 mono_w32file_move (const gunichar2 *path, const gunichar2 *dest, gint32 *error)
4928 {
4929         gboolean result;
4930
4931         result = MoveFile (path, dest);
4932         if (!result)
4933                 *error = mono_w32error_get_last ();
4934         return result;
4935 }
4936
4937 gboolean
4938 mono_w32file_copy (const gunichar2 *path, const gunichar2 *dest, gboolean overwrite, gint32 *error)
4939 {
4940         gboolean result;
4941
4942         result = CopyFile (path, dest, !overwrite);
4943         if (!result)
4944                 *error = mono_w32error_get_last ();
4945
4946         return result;
4947 }
4948
4949 gboolean
4950 mono_w32file_replace (const gunichar2 *destination_file_name, const gunichar2 *source_file_name, const gunichar2 *destination_backup_file_name, guint32 flags, gint32 *error)
4951 {
4952         gboolean result;
4953
4954         result = ReplaceFile (destination_file_name, source_file_name, destination_backup_file_name, flags, NULL, NULL);
4955         if (!result)
4956                 *error = mono_w32error_get_last ();
4957         return result;
4958 }
4959
4960 gint64
4961 mono_w32file_get_file_size (gpointer handle, gint32 *error)
4962 {
4963         gint64 length;
4964         guint32 length_hi;
4965
4966         length = GetFileSize (handle, &length_hi);
4967         if(length==INVALID_FILE_SIZE) {
4968                 *error=mono_w32error_get_last ();
4969         }
4970
4971         return length | ((gint64)length_hi << 32);
4972 }
4973
4974 gboolean
4975 mono_w32file_lock (gpointer handle, gint64 position, gint64 length, gint32 *error)
4976 {
4977         gboolean result;
4978
4979         result = LockFile (handle, position & 0xFFFFFFFF, position >> 32, length & 0xFFFFFFFF, length >> 32);
4980         if (!result)
4981                 *error = mono_w32error_get_last ();
4982         return result;
4983 }
4984
4985 gboolean
4986 mono_w32file_unlock (gpointer handle, gint64 position, gint64 length, gint32 *error)
4987 {
4988         gboolean result;
4989
4990         result = UnlockFile (handle, position & 0xFFFFFFFF, position >> 32, length & 0xFFFFFFFF, length >> 32);
4991         if (!result)
4992                 *error = mono_w32error_get_last ();
4993         return result;
4994 }
4995
4996 gpointer
4997 mono_w32file_get_console_input (void)
4998 {
4999         return mono_w32file_get_std_handle (STD_INPUT_HANDLE);
5000 }
5001
5002 gpointer
5003 mono_w32file_get_console_output (void)
5004 {
5005         return mono_w32file_get_std_handle (STD_OUTPUT_HANDLE);
5006 }
5007
5008 gpointer
5009 mono_w32file_get_console_error (void)
5010 {
5011         return mono_w32file_get_std_handle (STD_ERROR_HANDLE);
5012 }