dlls/ntdll/directory.c

   1 /*
   2  * NTDLL directory functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 2003 Eric Pouech
   6  * Copyright 1996, 2004 Alexandre Julliard
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "config.h"
  24 #include "wine/port.h"
  25
  26 #include <sys/types.h>
  27 #include <dirent.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <stdarg.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #ifdef HAVE_MNTENT_H
  35 #include <mntent.h>
  36 #endif
  37 #include <sys/stat.h>
  38 #ifdef HAVE_SYS_IOCTL_H
  39 #include <sys/ioctl.h>
  40 #endif
  41 #ifdef HAVE_LINUX_IOCTL_H
  42 #include <linux/ioctl.h>
  43 #endif
  44 #ifdef HAVE_SYS_PARAM_H
  45 #include <sys/param.h>
  46 #endif
  47 #ifdef HAVE_SYS_MOUNT_H
  48 #include <sys/mount.h>
  49 #endif
  50 #include <time.h>
  51 #ifdef HAVE_UNISTD_H
  52 # include <unistd.h>
  53 #endif
  54
  55 #define NONAMELESSUNION
  56 #define NONAMELESSSTRUCT
  57 #include "windef.h"
  58 #include "winbase.h"
  59 #include "winnt.h"
  60 #include "winreg.h"
  61 #include "ntstatus.h"
  62 #include "winternl.h"
  63 #include "ntdll_misc.h"
  64 #include "wine/unicode.h"
  65 #include "wine/server.h"
  66 #include "wine/library.h"
  67 #include "wine/debug.h"
  68
  69 WINE_DEFAULT_DEBUG_CHANNEL(file);
  70
  71 /* just in case... */
  72 #undef VFAT_IOCTL_READDIR_BOTH
  73 #undef USE_GETDENTS
  74
  75 #ifdef linux
  76
  77 /* We want the real kernel dirent structure, not the libc one */
  78 typedef struct
  79 {
  80     long d_ino;
  81     long d_off;
  82     unsigned short d_reclen;
  83     char d_name[256];
  84 } KERNEL_DIRENT;
  85
  86 /* Define the VFAT ioctl to get both short and long file names */
  87 #define VFAT_IOCTL_READDIR_BOTH  _IOR('r', 1, KERNEL_DIRENT [2] )
  88
  89 #ifndef O_DIRECTORY
  90 # define O_DIRECTORY 0200000 /* must be directory */
  91 #endif
  92
  93 #ifdef __i386__
  94
  95 typedef struct
  96 {
  97     ULONG64        d_ino;
  98     LONG64         d_off;
  99     unsigned short d_reclen;
 100     unsigned char  d_type;
 101     char           d_name[256];
 102 } KERNEL_DIRENT64;
 103
 104 static inline int getdents64( int fd, KERNEL_DIRENT64 *de, unsigned int size )
 105 {
 106     int ret;
 107     __asm__( "pushl %%ebx; movl %2,%%ebx; int $0x80; popl %%ebx"
 108              : "=a" (ret)
 109              : "0" (220 /*NR_getdents64*/), "r" (fd), "c" (de), "d" (size)
 110              : "memory" );
 111     if (ret < 0)
 112     {
 113         errno = -ret;
 114         ret = -1;
 115     }
 116     return ret;
 117 }
 118 #define USE_GETDENTS
 119
 120 #endif  /* i386 */
 121
 122 #endif  /* linux */
 123
 124 #define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1')
 125 #define IS_SEPARATOR(ch)   ((ch) == '\\' || (ch) == '/')
 126
 127 #define INVALID_NT_CHARS   '*','?','<','>','|','"'
 128 #define INVALID_DOS_CHARS  INVALID_NT_CHARS,'+','=',',',';','[',']',' ','\345'
 129
 130 #define MAX_DIR_ENTRY_LEN 255  /* max length of a directory entry in chars */
 131
 132 static int show_dir_symlinks = -1;
 133 static int show_dot_files;
 134
 135 /* at some point we may want to allow Winelib apps to set this */
 136 static const int is_case_sensitive = FALSE;
 137
 138 static CRITICAL_SECTION dir_section;
 139 static CRITICAL_SECTION_DEBUG critsect_debug =
 140 {
 141     0, 0, &dir_section,
 142     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
 143       0, 0, { 0, (DWORD)(__FILE__ ": dir_section") }
 144 };
 145 static CRITICAL_SECTION dir_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 146
 147
 148 /* check if a given Unicode char is OK in a DOS short name */
 149 static inline BOOL is_invalid_dos_char( WCHAR ch )
 150 {
 151     static const WCHAR invalid_chars[] = { INVALID_DOS_CHARS,'~','.',0 };
 152     if (ch > 0x7f) return TRUE;
 153     return strchrW( invalid_chars, ch ) != NULL;
 154 }
 155
 156 /***********************************************************************
 157  *           get_default_com_device
 158  *
 159  * Return the default device to use for serial ports.
 160  */
 161 static char *get_default_com_device( int num )
 162 {
 163     char *ret = NULL;
 164
 165     if (!num || num > 9) return ret;
 166 #ifdef linux
 167     ret = RtlAllocateHeap( GetProcessHeap(), 0, sizeof("/dev/ttyS0") );
 168     if (ret)
 169     {
 170         strcpy( ret, "/dev/ttyS0" );
 171         ret[strlen(ret) - 1] = '0' + num - 1;
 172     }
 173 #else
 174     FIXME( "no known default for device com%d\n", num );
 175 #endif
 176     return ret;
 177 }
 178
 179
 180 /***********************************************************************
 181  *           get_default_lpt_device
 182  *
 183  * Return the default device to use for parallel ports.
 184  */
 185 static char *get_default_lpt_device( int num )
 186 {
 187     char *ret = NULL;
 188
 189     if (!num || num > 9) return ret;
 190 #ifdef linux
 191     ret = RtlAllocateHeap( GetProcessHeap(), 0, sizeof("/dev/lp0") );
 192     if (ret)
 193     {
 194         strcpy( ret, "/dev/lp0" );
 195         ret[strlen(ret) - 1] = '0' + num - 1;
 196     }
 197 #else
 198     FIXME( "no known default for device lpt%d\n", num );
 199 #endif
 200     return ret;
 201 }
 202
 203
 204 /***********************************************************************
 205  *           parse_mount_entries
 206  *
 207  * Parse mount entries looking for a given device. Helper for get_default_drive_device.
 208  */
 209 #ifdef linux
 210 static char *parse_mount_entries( FILE *f, dev_t dev, ino_t ino )
 211 {
 212     struct mntent *entry;
 213     struct stat st;
 214     char *device;
 215
 216     while ((entry = getmntent( f )))
 217     {
 218         /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
 219         if (!strcmp( entry->mnt_type, "nfs" ) ||
 220             !strcmp( entry->mnt_type, "smbfs" ) ||
 221             !strcmp( entry->mnt_type, "ncpfs" )) continue;
 222
 223         if (stat( entry->mnt_dir, &st ) == -1) continue;
 224         if (st.st_dev != dev || st.st_ino != ino) continue;
 225         if (!strcmp( entry->mnt_type, "supermount" ))
 226         {
 227             if ((device = strstr( entry->mnt_opts, "dev=" )))
 228             {
 229                 char *p = strchr( device + 4, ',' );
 230                 if (p) *p = 0;
 231                 return device + 4;
 232             }
 233         }
 234         else
 235             return entry->mnt_fsname;
 236     }
 237     return NULL;
 238 }
 239 #endif
 240
 241 /***********************************************************************
 242  *           get_default_drive_device
 243  *
 244  * Return the default device to use for a given drive mount point.
 245  */
 246 static char *get_default_drive_device( const char *root )
 247 {
 248     char *ret = NULL;
 249
 250 #ifdef linux
 251     FILE *f;
 252     char *device = NULL;
 253     int fd, res = -1;
 254     struct stat st;
 255
 256     /* try to open it first to force it to get mounted */
 257     if ((fd = open( root, O_RDONLY | O_DIRECTORY )) != -1)
 258     {
 259         res = fstat( fd, &st );
 260         close( fd );
 261     }
 262     /* now try normal stat just in case */
 263     if (res == -1) res = stat( root, &st );
 264     if (res == -1) return NULL;
 265
 266     RtlEnterCriticalSection( &dir_section );
 267
 268     if ((f = fopen( "/etc/mtab", "r" )))
 269     {
 270         device = parse_mount_entries( f, st.st_dev, st.st_ino );
 271         endmntent( f );
 272     }
 273     /* look through fstab too in case it's not mounted (for instance if it's an audio CD) */
 274     if (!device && (f = fopen( "/etc/fstab", "r" )))
 275     {
 276         device = parse_mount_entries( f, st.st_dev, st.st_ino );
 277         endmntent( f );
 278     }
 279     if (device)
 280     {
 281         ret = RtlAllocateHeap( GetProcessHeap(), 0, strlen(device) + 1 );
 282         if (ret) strcpy( ret, device );
 283     }
 284     RtlLeaveCriticalSection( &dir_section );
 285 #elif defined(__APPLE__)
 286     struct statfs *mntStat;
 287     struct stat st;
 288     int i;
 289     int mntSize;
 290     dev_t dev;
 291     ino_t ino;
 292     static const char path_bsd_device[] = "/dev/disk";
 293     int res;
 294
 295     res = stat( root, &st );
 296     if (res == -1) return NULL;
 297
 298     dev = st.st_dev;
 299     ino = st.st_ino;
 300
 301     RtlEnterCriticalSection( &dir_section );
 302
 303     mntSize = getmntinfo(&mntStat, MNT_NOWAIT);
 304
 305     for (i = 0; i < mntSize && !ret; i++)
 306     {
 307         if (stat(mntStat[i].f_mntonname, &st ) == -1) continue;
 308         if (st.st_dev != dev || st.st_ino != ino) continue;
 309
 310         /* FIXME add support for mounted network drive */
 311         if ( strncmp(mntStat[i].f_mntfromname, path_bsd_device, strlen(path_bsd_device)) == 0)
 312         {
 313             /* set return value to the corresponding raw BSD node */
 314             ret = RtlAllocateHeap( GetProcessHeap(), 0, strlen(mntStat[i].f_mntfromname) + 2 /* 2 : r and \0 */ );
 315             if (ret)
 316             {
 317                 strcpy(ret, "/dev/r");
 318                 strcat(ret, mntStat[i].f_mntfromname+sizeof("/dev/")-1);
 319             }
 320         }
 321     }
 322     RtlLeaveCriticalSection( &dir_section );
 323 #else
 324     static int warned;
 325     if (!warned++) FIXME( "auto detection of DOS devices not supported on this platform\n" );
 326 #endif
 327     return ret;
 328 }
 329
 330
 331 /***********************************************************************
 332  *           init_options
 333  *
 334  * Initialize the show_dir_symlinks and show_dot_files options.
 335  */
 336 static void init_options(void)
 337 {
 338     static const WCHAR WineW[] = {'M','a','c','h','i','n','e','\\',
 339                                   'S','o','f','t','w','a','r','e','\\',
 340                                   'W','i','n','e','\\','W','i','n','e','\\',
 341                                   'C','o','n','f','i','g','\\','W','i','n','e',0};
 342     static const WCHAR ShowDotFilesW[] = {'S','h','o','w','D','o','t','F','i','l','e','s',0};
 343     static const WCHAR ShowDirSymlinksW[] = {'S','h','o','w','D','i','r','S','y','m','l','i','n','k','s',0};
 344     char tmp[80];
 345     HKEY hkey;
 346     DWORD dummy;
 347     OBJECT_ATTRIBUTES attr;
 348     UNICODE_STRING nameW;
 349
 350     show_dot_files = show_dir_symlinks = 0;
 351
 352     attr.Length = sizeof(attr);
 353     attr.RootDirectory = 0;
 354     attr.ObjectName = &nameW;
 355     attr.Attributes = 0;
 356     attr.SecurityDescriptor = NULL;
 357     attr.SecurityQualityOfService = NULL;
 358     RtlInitUnicodeString( &nameW, WineW );
 359
 360     if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr ))
 361     {
 362         RtlInitUnicodeString( &nameW, ShowDotFilesW );
 363         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 364         {
 365             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 366             show_dot_files = IS_OPTION_TRUE( str[0] );
 367         }
 368         RtlInitUnicodeString( &nameW, ShowDirSymlinksW );
 369         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
 370         {
 371             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;
 372             show_dir_symlinks = IS_OPTION_TRUE( str[0] );
 373         }
 374         NtClose( hkey );
 375     }
 376 }
 377
 378
 379 /***********************************************************************
 380  *           DIR_is_hidden_file
 381  *
 382  * Check if the specified file should be hidden based on its name and the show dot files option.
 383  */
 384 BOOL DIR_is_hidden_file( const UNICODE_STRING *name )
 385 {
 386     WCHAR *p, *end;
 387
 388     if (show_dir_symlinks == -1) init_options();
 389     if (show_dot_files) return FALSE;
 390
 391     end = p = name->Buffer + name->Length/sizeof(WCHAR);
 392     while (p > name->Buffer && IS_SEPARATOR(p[-1])) p--;
 393     while (p > name->Buffer && !IS_SEPARATOR(p[-1])) p--;
 394     if (p == end || *p != '.') return FALSE;
 395     /* make sure it isn't '.' or '..' */
 396     if (p + 1 == end) return FALSE;
 397     if (p[1] == '.' && p + 2 == end) return FALSE;
 398     return TRUE;
 399 }
 400
 401
 402 /***********************************************************************
 403  *           hash_short_file_name
 404  *
 405  * Transform a Unix file name into a hashed DOS name. If the name is a valid
 406  * DOS name, it is converted to upper-case; otherwise it is replaced by a
 407  * hashed version that fits in 8.3 format.
 408  * 'buffer' must be at least 12 characters long.
 409  * Returns length of short name in bytes; short name is NOT null-terminated.
 410  */
 411 static ULONG hash_short_file_name( const UNICODE_STRING *name, LPWSTR buffer )
 412 {
 413     static const char hash_chars[32] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345";
 414
 415     LPCWSTR p, ext, end = name->Buffer + name->Length / sizeof(WCHAR);
 416     LPWSTR dst;
 417     unsigned short hash;
 418     int i;
 419
 420     /* Compute the hash code of the file name */
 421     /* If you know something about hash functions, feel free to */
 422     /* insert a better algorithm here... */
 423     if (!is_case_sensitive)
 424     {
 425         for (p = name->Buffer, hash = 0xbeef; p < end - 1; p++)
 426             hash = (hash<<3) ^ (hash>>5) ^ tolowerW(*p) ^ (tolowerW(p[1]) << 8);
 427         hash = (hash<<3) ^ (hash>>5) ^ tolowerW(*p); /* Last character */
 428     }
 429     else
 430     {
 431         for (p = name->Buffer, hash = 0xbeef; p < end - 1; p++)
 432             hash = (hash << 3) ^ (hash >> 5) ^ *p ^ (p[1] << 8);
 433         hash = (hash << 3) ^ (hash >> 5) ^ *p;  /* Last character */
 434     }
 435
 436     /* Find last dot for start of the extension */
 437     for (p = name->Buffer + 1, ext = NULL; p < end - 1; p++) if (*p == '.') ext = p;
 438
 439     /* Copy first 4 chars, replacing invalid chars with '_' */
 440     for (i = 4, p = name->Buffer, dst = buffer; i > 0; i--, p++)
 441     {
 442         if (p == end || p == ext) break;
 443         *dst++ = is_invalid_dos_char(*p) ? '_' : toupperW(*p);
 444     }
 445     /* Pad to 5 chars with '~' */
 446     while (i-- >= 0) *dst++ = '~';
 447
 448     /* Insert hash code converted to 3 ASCII chars */
 449     *dst++ = hash_chars[(hash >> 10) & 0x1f];
 450     *dst++ = hash_chars[(hash >> 5) & 0x1f];
 451     *dst++ = hash_chars[hash & 0x1f];
 452
 453     /* Copy the first 3 chars of the extension (if any) */
 454     if (ext)
 455     {
 456         *dst++ = '.';
 457         for (i = 3, ext++; (i > 0) && ext < end; i--, ext++)
 458             *dst++ = is_invalid_dos_char(*ext) ? '_' : toupperW(*ext);
 459     }
 460     return dst - buffer;
 461 }
 462
 463
 464 /***********************************************************************
 465  *           match_filename
 466  *
 467  * Check a long file name against a mask.
 468  *
 469  * Tests (done in W95 DOS shell - case insensitive):
 470  * *.txt                        test1.test.txt                          *
 471  * *st1*                        test1.txt                               *
 472  * *.t??????.t*                 test1.ta.tornado.txt                    *
 473  * *tornado*                    test1.ta.tornado.txt                    *
 474  * t*t                          test1.ta.tornado.txt                    *
 475  * ?est*                        test1.txt                               *
 476  * ?est???                      test1.txt                               -
 477  * *test1.txt*                  test1.txt                               *
 478  * h?l?o*t.dat                  hellothisisatest.dat                    *
 479  */
 480 static BOOLEAN match_filename( const UNICODE_STRING *name_str, const UNICODE_STRING *mask_str )
 481 {
 482     int mismatch;
 483     const WCHAR *name = name_str->Buffer;
 484     const WCHAR *mask = mask_str->Buffer;
 485     const WCHAR *name_end = name + name_str->Length / sizeof(WCHAR);
 486     const WCHAR *mask_end = mask + mask_str->Length / sizeof(WCHAR);
 487     const WCHAR *lastjoker = NULL;
 488     const WCHAR *next_to_retry = NULL;
 489
 490     TRACE("(%s, %s)\n", debugstr_us(name_str), debugstr_us(mask_str));
 491
 492     while (name < name_end && mask < mask_end)
 493     {
 494         switch(*mask)
 495         {
 496         case '*':
 497             mask++;
 498             while (mask < mask_end && *mask == '*') mask++;  /* Skip consecutive '*' */
 499             if (mask == mask_end) return TRUE; /* end of mask is all '*', so match */
 500             lastjoker = mask;
 501
 502             /* skip to the next match after the joker(s) */
 503             if (is_case_sensitive)
 504                 while (name < name_end && (*name != *mask)) name++;
 505             else
 506                 while (name < name_end && (toupperW(*name) != toupperW(*mask))) name++;
 507             next_to_retry = name;
 508             break;
 509         case '?':
 510             mask++;
 511             name++;
 512             break;
 513         default:
 514             if (is_case_sensitive) mismatch = (*mask != *name);
 515             else mismatch = (toupperW(*mask) != toupperW(*name));
 516
 517             if (!mismatch)
 518             {
 519                 mask++;
 520                 name++;
 521                 if (mask == mask_end)
 522                 {
 523                     if (name == name_end) return TRUE;
 524                     if (lastjoker) mask = lastjoker;
 525                 }
 526             }
 527             else /* mismatch ! */
 528             {
 529                 if (lastjoker) /* we had an '*', so we can try unlimitedly */
 530                 {
 531                     mask = lastjoker;
 532
 533                     /* this scan sequence was a mismatch, so restart
 534                      * 1 char after the first char we checked last time */
 535                     next_to_retry++;
 536                     name = next_to_retry;
 537                 }
 538                 else return FALSE; /* bad luck */
 539             }
 540             break;
 541         }
 542     }
 543     while (mask < mask_end && ((*mask == '.') || (*mask == '*')))
 544         mask++;  /* Ignore trailing '.' or '*' in mask */
 545     return (name == name_end && mask == mask_end);
 546 }
 547
 548
 549 /***********************************************************************
 550  *           append_entry
 551  *
 552  * helper for NtQueryDirectoryFile
 553  */
 554 static FILE_BOTH_DIR_INFORMATION *append_entry( void *info_ptr, ULONG *pos, ULONG max_length,
 555                                                 const char *long_name, const char *short_name,
 556                                                 const UNICODE_STRING *mask )
 557 {
 558     FILE_BOTH_DIR_INFORMATION *info;
 559     int i, long_len, short_len, total_len;
 560     struct stat st;
 561     WCHAR long_nameW[MAX_DIR_ENTRY_LEN];
 562     WCHAR short_nameW[12];
 563     UNICODE_STRING str;
 564
 565     long_len = ntdll_umbstowcs( 0, long_name, strlen(long_name), long_nameW, MAX_DIR_ENTRY_LEN );
 566     if (long_len == -1) return NULL;
 567
 568     str.Buffer = long_nameW;
 569     str.Length = long_len * sizeof(WCHAR);
 570     str.MaximumLength = sizeof(long_nameW);
 571
 572     if (short_name)
 573     {
 574         short_len = ntdll_umbstowcs( 0, short_name, strlen(short_name),
 575                                      short_nameW, sizeof(short_nameW) / sizeof(WCHAR) );
 576         if (short_len == -1) short_len = sizeof(short_nameW) / sizeof(WCHAR);
 577     }
 578     else  /* generate a short name if necessary */
 579     {
 580         BOOLEAN spaces;
 581
 582         short_len = 0;
 583         if (!RtlIsNameLegalDOS8Dot3( &str, NULL, &spaces ) || spaces)
 584             short_len = hash_short_file_name( &str, short_nameW );
 585     }
 586
 587     TRACE( "long %s short %s mask %s\n",
 588            debugstr_us(&str), debugstr_wn(short_nameW, short_len), debugstr_us(mask) );
 589
 590     if (mask && !match_filename( &str, mask ))
 591     {
 592         if (!short_len) return NULL;  /* no short name to match */
 593         str.Buffer = short_nameW;
 594         str.Length = short_len * sizeof(WCHAR);
 595         str.MaximumLength = sizeof(short_nameW);
 596         if (!match_filename( &str, mask )) return NULL;
 597     }
 598
 599     total_len = (sizeof(*info) - sizeof(info->FileName) + long_len*sizeof(WCHAR) + 3) & ~3;
 600     info = (FILE_BOTH_DIR_INFORMATION *)((char *)info_ptr + *pos);
 601
 602     if (*pos + total_len > max_length) total_len = max_length - *pos;
 603
 604     if (lstat( long_name, &st ) == -1) return NULL;
 605     if (S_ISLNK( st.st_mode ))
 606     {
 607         if (stat( long_name, &st ) == -1) return NULL;
 608         if (S_ISDIR( st.st_mode ) && !show_dir_symlinks) return NULL;
 609     }
 610
 611     info->NextEntryOffset = total_len;
 612     info->FileIndex = 0;  /* NTFS always has 0 here, so let's not bother with it */
 613
 614     RtlSecondsSince1970ToTime( st.st_mtime, &info->CreationTime );
 615     RtlSecondsSince1970ToTime( st.st_mtime, &info->LastWriteTime );
 616     RtlSecondsSince1970ToTime( st.st_atime, &info->LastAccessTime );
 617     RtlSecondsSince1970ToTime( st.st_ctime, &info->ChangeTime );
 618
 619     if (S_ISDIR(st.st_mode))
 620     {
 621         info->EndOfFile.QuadPart = info->AllocationSize.QuadPart = 0;
 622         info->FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
 623     }
 624     else
 625     {
 626         info->EndOfFile.QuadPart = st.st_size;
 627         info->AllocationSize.QuadPart = (ULONGLONG)st.st_blocks * 512;
 628         info->FileAttributes = FILE_ATTRIBUTE_ARCHIVE;
 629     }
 630
 631     if (!(st.st_mode & S_IWUSR))
 632         info->FileAttributes |= FILE_ATTRIBUTE_READONLY;
 633
 634     if (!show_dot_files && long_name[0] == '.' && long_name[1] && (long_name[1] != '.' || long_name[2]))
 635         info->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
 636
 637     info->EaSize = 0; /* FIXME */
 638     info->ShortNameLength = short_len * sizeof(WCHAR);
 639     for (i = 0; i < short_len; i++) info->ShortName[i] = toupperW(short_nameW[i]);
 640     info->FileNameLength = long_len * sizeof(WCHAR);
 641     memcpy( info->FileName, long_nameW,
 642             min( info->FileNameLength, total_len-sizeof(*info)+sizeof(info->FileName) ));
 643
 644     *pos += total_len;
 645     return info;
 646 }
 647
 648
 649 /***********************************************************************
 650  *           read_directory_vfat
 651  *
 652  * Read a directory using the VFAT ioctl; helper for NtQueryDirectoryFile.
 653  */
 654 #ifdef VFAT_IOCTL_READDIR_BOTH
 655 static int read_directory_vfat( int fd, IO_STATUS_BLOCK *io, void *buffer, ULONG length,
 656                                 BOOLEAN single_entry, const UNICODE_STRING *mask,
 657                                 BOOLEAN restart_scan )
 658
 659 {
 660     int res;
 661     KERNEL_DIRENT de[2];
 662     FILE_BOTH_DIR_INFORMATION *info, *last_info = NULL;
 663     static const unsigned int max_dir_info_size = sizeof(*info) + (MAX_DIR_ENTRY_LEN-1) * sizeof(WCHAR);
 664
 665     io->u.Status = STATUS_SUCCESS;
 666
 667     if (restart_scan) lseek( fd, 0, SEEK_SET );
 668
 669     if (length < max_dir_info_size)  /* we may have to return a partial entry here */
 670     {
 671         off_t old_pos = lseek( fd, 0, SEEK_CUR );
 672
 673         res = ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de );
 674         if (res == -1 && errno != ENOENT) return -1;  /* VFAT ioctl probably not supported */
 675
 676         while (res != -1)
 677         {
 678             if (!de[0].d_reclen) break;
 679             if (de[1].d_name[0])
 680                 info = append_entry( buffer, &io->Information, length,
 681                                      de[1].d_name, de[0].d_name, mask );
 682             else
 683                 info = append_entry( buffer, &io->Information, length,
 684                                      de[0].d_name, NULL, mask );
 685             if (info)
 686             {
 687                 last_info = info;
 688                 if ((char *)info->FileName + info->FileNameLength > (char *)buffer + length)
 689                 {
 690                     io->u.Status = STATUS_BUFFER_OVERFLOW;
 691                     lseek( fd, old_pos, SEEK_SET );  /* restore pos to previous entry */
 692                 }
 693                 break;
 694             }
 695             old_pos = lseek( fd, 0, SEEK_CUR );
 696             res = ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de );
 697         }
 698     }
 699     else  /* we'll only return full entries, no need to worry about overflow */
 700     {
 701         res = ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de );
 702         if (res == -1 && errno != ENOENT) return -1;  /* VFAT ioctl probably not supported */
 703
 704         while (res != -1)
 705         {
 706             if (!de[0].d_reclen) break;
 707             if (de[1].d_name[0])
 708                 info = append_entry( buffer, &io->Information, length,
 709                                      de[1].d_name, de[0].d_name, mask );
 710             else
 711                 info = append_entry( buffer, &io->Information, length,
 712                                      de[0].d_name, NULL, mask );
 713             if (info)
 714             {
 715                 last_info = info;
 716                 if (single_entry) break;
 717                 /* check if we still have enough space for the largest possible entry */
 718                 if (io->Information + max_dir_info_size > length) break;
 719             }
 720             res = ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de );
 721         }
 722     }
 723
 724     if (last_info) last_info->NextEntryOffset = 0;
 725     else io->u.Status = restart_scan ? STATUS_NO_SUCH_FILE : STATUS_NO_MORE_FILES;
 726     return 0;
 727 }
 728 #endif /* VFAT_IOCTL_READDIR_BOTH */
 729
 730
 731 /***********************************************************************
 732  *           read_directory_getdents
 733  *
 734  * Read a directory using the Linux getdents64 system call; helper for NtQueryDirectoryFile.
 735  */
 736 #ifdef USE_GETDENTS
 737 static int read_directory_getdents( int fd, IO_STATUS_BLOCK *io, void *buffer, ULONG length,
 738                                     BOOLEAN single_entry, const UNICODE_STRING *mask,
 739                                     BOOLEAN restart_scan )
 740 {
 741     off_t old_pos = 0;
 742     size_t size = length;
 743     int res;
 744     char local_buffer[8192];
 745     KERNEL_DIRENT64 *data, *de;
 746     FILE_BOTH_DIR_INFORMATION *info, *last_info = NULL;
 747     static const unsigned int max_dir_info_size = sizeof(*info) + (MAX_DIR_ENTRY_LEN-1) * sizeof(WCHAR);
 748
 749     if (size <= sizeof(local_buffer) || !(data = RtlAllocateHeap( GetProcessHeap(), 0, size )))
 750     {
 751         size = sizeof(local_buffer);
 752         data = (KERNEL_DIRENT64 *)local_buffer;
 753     }
 754
 755     if (restart_scan) lseek( fd, 0, SEEK_SET );
 756     else if (length < max_dir_info_size)  /* we may have to return a partial entry here */
 757     {
 758         old_pos = lseek( fd, 0, SEEK_CUR );
 759         if (old_pos == -1 && errno == ENOENT)
 760         {
 761             io->u.Status = STATUS_NO_MORE_FILES;
 762             res = 0;
 763             goto done;
 764         }
 765     }
 766
 767     io->u.Status = STATUS_SUCCESS;
 768
 769     res = getdents64( fd, data, size );
 770     if (res == -1)
 771     {
 772         if (errno != ENOSYS)
 773         {
 774             io->u.Status = FILE_GetNtStatus();
 775             res = 0;
 776         }
 777         goto done;
 778     }
 779
 780     de = data;
 781
 782     while (res > 0)
 783     {
 784         res -= de->d_reclen;
 785         info = append_entry( buffer, &io->Information, length, de->d_name, NULL, mask );
 786         if (info)
 787         {
 788             last_info = info;
 789             if ((char *)info->FileName + info->FileNameLength > (char *)buffer + length)
 790             {
 791                 io->u.Status = STATUS_BUFFER_OVERFLOW;
 792                 lseek( fd, old_pos, SEEK_SET );  /* restore pos to previous entry */
 793                 break;
 794             }
 795             /* check if we still have enough space for the largest possible entry */
 796             if (single_entry || io->Information + max_dir_info_size > length)
 797             {
 798                 if (res > 0) lseek( fd, de->d_off, SEEK_SET );  /* set pos to next entry */
 799                 break;
 800             }
 801         }
 802         old_pos = de->d_off;
 803         /* move on to the next entry */
 804         if (res > 0) de = (KERNEL_DIRENT64 *)((char *)de + de->d_reclen);
 805         else
 806         {
 807             res = getdents64( fd, data, size );
 808             de = data;
 809         }
 810     }
 811
 812     if (last_info) last_info->NextEntryOffset = 0;
 813     else io->u.Status = restart_scan ? STATUS_NO_SUCH_FILE : STATUS_NO_MORE_FILES;
 814     res = 0;
 815 done:
 816     if ((char *)data != local_buffer) RtlFreeHeap( GetProcessHeap(), 0, data );
 817     return res;
 818 }
 819 #endif  /* USE_GETDENTS */
 820
 821
 822 /***********************************************************************
 823  *           read_directory_readdir
 824  *
 825  * Read a directory using the POSIX readdir interface; helper for NtQueryDirectoryFile.
 826  */
 827 static void read_directory_readdir( int fd, IO_STATUS_BLOCK *io, void *buffer, ULONG length,
 828                                     BOOLEAN single_entry, const UNICODE_STRING *mask,
 829                                     BOOLEAN restart_scan )
 830 {
 831     DIR *dir;
 832     off_t i, old_pos = 0;
 833     struct dirent *de;
 834     FILE_BOTH_DIR_INFORMATION *info, *last_info = NULL;
 835     static const unsigned int max_dir_info_size = sizeof(*info) + (MAX_DIR_ENTRY_LEN-1) * sizeof(WCHAR);
 836
 837     if (!(dir = opendir( "." )))
 838     {
 839         io->u.Status = FILE_GetNtStatus();
 840         return;
 841     }
 842
 843     if (!restart_scan)
 844     {
 845         old_pos = lseek( fd, 0, SEEK_CUR );
 846         /* skip the right number of entries */
 847         for (i = 0; i < old_pos; i++)
 848         {
 849             if (!readdir( dir ))
 850             {
 851                 closedir( dir );
 852                 io->u.Status = STATUS_NO_MORE_FILES;
 853                 return;
 854             }
 855         }
 856     }
 857     io->u.Status = STATUS_SUCCESS;
 858
 859     while ((de = readdir( dir )))
 860     {
 861         old_pos++;
 862         info = append_entry( buffer, &io->Information, length, de->d_name, NULL, mask );
 863         if (info)
 864         {
 865             last_info = info;
 866             if ((char *)info->FileName + info->FileNameLength > (char *)buffer + length)
 867             {
 868                 io->u.Status = STATUS_BUFFER_OVERFLOW;
 869                 old_pos--;  /* restore pos to previous entry */
 870                 break;
 871             }
 872             if (single_entry) break;
 873             /* check if we still have enough space for the largest possible entry */
 874             if (io->Information + max_dir_info_size > length) break;
 875         }
 876     }
 877
 878     lseek( fd, old_pos, SEEK_SET );  /* store dir offset as filepos for fd */
 879     closedir( dir );
 880
 881     if (last_info) last_info->NextEntryOffset = 0;
 882     else io->u.Status = restart_scan ? STATUS_NO_SUCH_FILE : STATUS_NO_MORE_FILES;
 883 }
 884
 885
 886 /******************************************************************************
 887  *  NtQueryDirectoryFile        [NTDLL.@]
 888  *  ZwQueryDirectoryFile        [NTDLL.@]
 889  */
 890 NTSTATUS WINAPI NtQueryDirectoryFile( HANDLE handle, HANDLE event,
 891                                       PIO_APC_ROUTINE apc_routine, PVOID apc_context,
 892                                       PIO_STATUS_BLOCK io,
 893                                       PVOID buffer, ULONG length,
 894                                       FILE_INFORMATION_CLASS info_class,
 895                                       BOOLEAN single_entry,
 896                                       PUNICODE_STRING mask,
 897                                       BOOLEAN restart_scan )
 898 {
 899     int cwd, fd;
 900
 901     TRACE("(%p %p %p %p %p %p 0x%08lx 0x%08x 0x%08x %s 0x%08x\n",
 902           handle, event, apc_routine, apc_context, io, buffer,
 903           length, info_class, single_entry, debugstr_us(mask),
 904           restart_scan);
 905
 906     if (length < sizeof(FILE_BOTH_DIR_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
 907
 908     if (event || apc_routine)
 909     {
 910         FIXME( "Unsupported yet option\n" );
 911         return io->u.Status = STATUS_NOT_IMPLEMENTED;
 912     }
 913     if (info_class != FileBothDirectoryInformation)
 914     {
 915         FIXME( "Unsupported file info class %d\n", info_class );
 916         return io->u.Status = STATUS_NOT_IMPLEMENTED;
 917     }
 918
 919     if ((io->u.Status = wine_server_handle_to_fd( handle, GENERIC_READ, &fd, NULL )) != STATUS_SUCCESS)
 920         return io->u.Status;
 921
 922     io->Information = 0;
 923
 924     RtlEnterCriticalSection( &dir_section );
 925
 926     if (show_dir_symlinks == -1) init_options();
 927
 928     if ((cwd = open(".", O_RDONLY)) != -1 && fchdir( fd ) != -1)
 929     {
 930 #ifdef VFAT_IOCTL_READDIR_BOTH
 931         if ((read_directory_vfat( fd, io, buffer, length, single_entry, mask, restart_scan )) == -1)
 932 #endif
 933 #ifdef USE_GETDENTS
 934             if ((read_directory_getdents( fd, io, buffer, length, single_entry, mask, restart_scan )) == -1)
 935 #endif
 936                 read_directory_readdir( fd, io, buffer, length, single_entry, mask, restart_scan );
 937
 938         if (fchdir( cwd ) == -1) chdir( "/" );
 939     }
 940     else io->u.Status = FILE_GetNtStatus();
 941
 942     RtlLeaveCriticalSection( &dir_section );
 943
 944     wine_server_release_fd( handle, fd );
 945     if (cwd != -1) close( cwd );
 946     TRACE( "=> %lx (%ld)\n", io->u.Status, io->Information );
 947     return io->u.Status;
 948 }
 949
 950
 951 /***********************************************************************
 952  *           find_file_in_dir
 953  *
 954  * Find a file in a directory the hard way, by doing a case-insensitive search.
 955  * The file found is appended to unix_name at pos.
 956  * There must be at least MAX_DIR_ENTRY_LEN+2 chars available at pos.
 957  */
 958 static NTSTATUS find_file_in_dir( char *unix_name, int pos, const WCHAR *name, int length,
 959                                   int check_case )
 960 {
 961     WCHAR buffer[MAX_DIR_ENTRY_LEN];
 962     UNICODE_STRING str;
 963     BOOLEAN spaces;
 964     DIR *dir;
 965     struct dirent *de;
 966     struct stat st;
 967     int ret, used_default, is_name_8_dot_3;
 968
 969     /* try a shortcut for this directory */
 970
 971     unix_name[pos++] = '/';
 972     ret = ntdll_wcstoumbs( 0, name, length, unix_name + pos, MAX_DIR_ENTRY_LEN,
 973                            NULL, &used_default );
 974     /* if we used the default char, the Unix name won't round trip properly back to Unicode */
 975     /* so it cannot match the file we are looking for */
 976     if (ret >= 0 && !used_default)
 977     {
 978         unix_name[pos + ret] = 0;
 979         if (!stat( unix_name, &st )) return STATUS_SUCCESS;
 980     }
 981     if (check_case) goto not_found;  /* we want an exact match */
 982
 983     if (pos > 1) unix_name[pos - 1] = 0;
 984     else unix_name[1] = 0;  /* keep the initial slash */
 985
 986     /* check if it fits in 8.3 so that we don't look for short names if we won't need them */
 987
 988     str.Buffer = (WCHAR *)name;
 989     str.Length = length * sizeof(WCHAR);
 990     str.MaximumLength = str.Length;
 991     is_name_8_dot_3 = RtlIsNameLegalDOS8Dot3( &str, NULL, &spaces ) && !spaces;
 992
 993     /* now look for it through the directory */
 994
 995 #ifdef VFAT_IOCTL_READDIR_BOTH
 996     if (is_name_8_dot_3)
 997     {
 998         int fd = open( unix_name, O_RDONLY | O_DIRECTORY );
 999         if (fd != -1)
1000         {
1001             KERNEL_DIRENT de[2];
1002
1003             if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) != -1)
1004             {
1005                 unix_name[pos - 1] = '/';
1006                 for (;;)
1007                 {
1008                     if (!de[0].d_reclen) break;
1009
1010                     if (de[1].d_name[0])
1011                     {
1012                         ret = ntdll_umbstowcs( 0, de[1].d_name, strlen(de[1].d_name),
1013                                                buffer, MAX_DIR_ENTRY_LEN );
1014                         if (ret == length && !memicmpW( buffer, name, length))
1015                         {
1016                             strcpy( unix_name + pos, de[1].d_name );
1017                             close( fd );
1018                             return STATUS_SUCCESS;
1019                         }
1020                     }
1021                     ret = ntdll_umbstowcs( 0, de[0].d_name, strlen(de[0].d_name),
1022                                            buffer, MAX_DIR_ENTRY_LEN );
1023                     if (ret == length && !memicmpW( buffer, name, length))
1024                     {
1025                         strcpy( unix_name + pos,
1026                                 de[1].d_name[0] ? de[1].d_name : de[0].d_name );
1027                         close( fd );
1028                         return STATUS_SUCCESS;
1029                     }
1030                     if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) == -1)
1031                     {
1032                         close( fd );
1033                         goto not_found;
1034                     }
1035                 }
1036             }
1037             close( fd );
1038         }
1039         /* fall through to normal handling */
1040     }
1041 #endif /* VFAT_IOCTL_READDIR_BOTH */
1042
1043     if (!(dir = opendir( unix_name )))
1044     {
1045         if (errno == ENOENT) return STATUS_OBJECT_PATH_NOT_FOUND;
1046         else return FILE_GetNtStatus();
1047     }
1048     unix_name[pos - 1] = '/';
1049     str.Buffer = buffer;
1050     str.MaximumLength = sizeof(buffer);
1051     while ((de = readdir( dir )))
1052     {
1053         ret = ntdll_umbstowcs( 0, de->d_name, strlen(de->d_name), buffer, MAX_DIR_ENTRY_LEN );
1054         if (ret == length && !memicmpW( buffer, name, length ))
1055         {
1056             strcpy( unix_name + pos, de->d_name );
1057             closedir( dir );
1058             return STATUS_SUCCESS;
1059         }
1060
1061         if (!is_name_8_dot_3) continue;
1062
1063         str.Length = ret * sizeof(WCHAR);
1064         if (!RtlIsNameLegalDOS8Dot3( &str, NULL, &spaces ) || spaces)
1065         {
1066             WCHAR short_nameW[12];
1067             ret = hash_short_file_name( &str, short_nameW );
1068             if (ret == length && !memicmpW( short_nameW, name, length ))
1069             {
1070                 strcpy( unix_name + pos, de->d_name );
1071                 closedir( dir );
1072                 return STATUS_SUCCESS;
1073             }
1074         }
1075     }
1076     closedir( dir );
1077     goto not_found;  /* avoid warning */
1078
1079 not_found:
1080     unix_name[pos - 1] = 0;
1081     return STATUS_OBJECT_PATH_NOT_FOUND;
1082 }
1083
1084
1085 /******************************************************************************
1086  *           get_dos_device
1087  *
1088  * Get the Unix path of a DOS device.
1089  */
1090 static NTSTATUS get_dos_device( const WCHAR *name, UINT name_len, ANSI_STRING *unix_name_ret )
1091 {
1092     const char *config_dir = wine_get_config_dir();
1093     struct stat st;
1094     char *unix_name, *new_name, *dev;
1095     unsigned int i;
1096     int unix_len;
1097
1098     /* make sure the device name is ASCII */
1099     for (i = 0; i < name_len; i++)
1100         if (name[i] <= 32 || name[i] >= 127) return STATUS_OBJECT_NAME_NOT_FOUND;
1101
1102     unix_len = strlen(config_dir) + sizeof("/dosdevices/") + name_len + 1;
1103
1104     if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
1105         return STATUS_NO_MEMORY;
1106
1107     strcpy( unix_name, config_dir );
1108     strcat( unix_name, "/dosdevices/" );
1109     dev = unix_name + strlen(unix_name);
1110
1111     for (i = 0; i < name_len; i++) dev[i] = (char)tolowerW(name[i]);
1112     dev[i] = 0;
1113
1114     /* special case for drive devices */
1115     if (name_len == 2 && dev[1] == ':')
1116     {
1117         dev[i++] = ':';
1118         dev[i] = 0;
1119     }
1120
1121     for (;;)
1122     {
1123         if (!stat( unix_name, &st ))
1124         {
1125             TRACE( "%s -> %s\n", debugstr_wn(name,name_len), debugstr_a(unix_name) );
1126             unix_name_ret->Buffer = unix_name;
1127             unix_name_ret->Length = strlen(unix_name);
1128             unix_name_ret->MaximumLength = unix_len;
1129             return STATUS_SUCCESS;
1130         }
1131         if (!dev) break;
1132
1133         /* now try some defaults for it */
1134         if (!strcmp( dev, "aux" ))
1135         {
1136             strcpy( dev, "com1" );
1137             continue;
1138         }
1139         if (!strcmp( dev, "prn" ))
1140         {
1141             strcpy( dev, "lpt1" );
1142             continue;
1143         }
1144         if (!strcmp( dev, "nul" ))
1145         {
1146             strcpy( unix_name, "/dev/null" );
1147             dev = NULL; /* last try */
1148             continue;
1149         }
1150
1151         new_name = NULL;
1152         if (dev[1] == ':' && dev[2] == ':')  /* drive device */
1153         {
1154             dev[2] = 0;  /* remove last ':' to get the drive mount point symlink */
1155             new_name = get_default_drive_device( unix_name );
1156         }
1157         else if (!strncmp( dev, "com", 3 )) new_name = get_default_com_device( dev[3] - '0' );
1158         else if (!strncmp( dev, "lpt", 3 )) new_name = get_default_lpt_device( dev[3] - '0' );
1159
1160         if (!new_name) break;
1161
1162         RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1163         unix_name = new_name;
1164         unix_len = strlen(unix_name) + 1;
1165         dev = NULL; /* last try */
1166     }
1167     RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1168     return STATUS_OBJECT_NAME_NOT_FOUND;
1169 }
1170
1171
1172 /* return the length of the DOS namespace prefix if any */
1173 static inline int get_dos_prefix_len( const UNICODE_STRING *name )
1174 {
1175     static const WCHAR nt_prefixW[] = {'\\','?','?','\\'};
1176     static const WCHAR dosdev_prefixW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\'};
1177
1178     if (name->Length > sizeof(nt_prefixW) &&
1179         !memcmp( name->Buffer, nt_prefixW, sizeof(nt_prefixW) ))
1180         return sizeof(nt_prefixW) / sizeof(WCHAR);
1181
1182     if (name->Length > sizeof(dosdev_prefixW) &&
1183         !memicmpW( name->Buffer, dosdev_prefixW, sizeof(dosdev_prefixW)/sizeof(WCHAR) ))
1184         return sizeof(dosdev_prefixW) / sizeof(WCHAR);
1185
1186     return 0;
1187 }
1188
1189
1190 /******************************************************************************
1191  *           wine_nt_to_unix_file_name  (NTDLL.@) Not a Windows API
1192  *
1193  * Convert a file name from NT namespace to Unix namespace.
1194  *
1195  * If disposition is not FILE_OPEN or FILE_OVERWRITTE, the last path
1196  * element doesn't have to exist; in that case STATUS_NO_SUCH_FILE is
1197  * returned, but the unix name is still filled in properly.
1198  */
1199 NTSTATUS wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRING *unix_name_ret,
1200                                     UINT disposition, BOOLEAN check_case )
1201 {
1202     static const WCHAR uncW[] = {'U','N','C','\\'};
1203     static const WCHAR invalid_charsW[] = { INVALID_NT_CHARS, 0 };
1204
1205     NTSTATUS status = STATUS_SUCCESS;
1206     const char *config_dir = wine_get_config_dir();
1207     const WCHAR *name, *p;
1208     struct stat st;
1209     char *unix_name;
1210     int pos, ret, name_len, unix_len, used_default;
1211
1212     name     = nameW->Buffer;
1213     name_len = nameW->Length / sizeof(WCHAR);
1214
1215     if (!name_len || !IS_SEPARATOR(name[0])) return STATUS_OBJECT_PATH_SYNTAX_BAD;
1216
1217     if ((pos = get_dos_prefix_len( nameW )))
1218     {
1219         BOOLEAN is_unc = FALSE;
1220
1221         name += pos;
1222         name_len -= pos;
1223
1224         /* check for UNC prefix */
1225         if (name_len > 4 && !memicmpW( name, uncW, 4 ))
1226         {
1227             name += 3;
1228             name_len -= 3;
1229             is_unc = TRUE;
1230         }
1231         else
1232         {
1233             /* check for a drive letter with path */
1234             if (name_len < 3 || !isalphaW(name[0]) || name[1] != ':' || !IS_SEPARATOR(name[2]))
1235             {
1236                 /* not a drive with path, try other DOS devices */
1237                 return get_dos_device( name, name_len, unix_name_ret );
1238             }
1239             name += 2;  /* skip drive letter */
1240             name_len -= 2;
1241         }
1242
1243         /* check for invalid characters */
1244         for (p = name; p < name + name_len; p++)
1245             if (*p < 32 || strchrW( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
1246
1247         unix_len = ntdll_wcstoumbs( 0, name, name_len, NULL, 0, NULL, NULL );
1248         unix_len += MAX_DIR_ENTRY_LEN + 3;
1249         unix_len += strlen(config_dir) + sizeof("/dosdevices/") + 3;
1250         if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
1251             return STATUS_NO_MEMORY;
1252         strcpy( unix_name, config_dir );
1253         strcat( unix_name, "/dosdevices/" );
1254         pos = strlen(unix_name);
1255         if (is_unc)
1256         {
1257             strcpy( unix_name + pos, "unc" );
1258             pos += 3;
1259         }
1260         else
1261         {
1262             unix_name[pos++] = tolowerW( name[-2] );
1263             unix_name[pos++] = ':';
1264             unix_name[pos] = 0;
1265         }
1266     }
1267     else  /* no DOS prefix, assume NT native name, map directly to Unix */
1268     {
1269         if (!name_len || !IS_SEPARATOR(name[0])) return STATUS_OBJECT_NAME_INVALID;
1270         unix_len = ntdll_wcstoumbs( 0, name, name_len, NULL, 0, NULL, NULL );
1271         unix_len += MAX_DIR_ENTRY_LEN + 3;
1272         if (!(unix_name = RtlAllocateHeap( GetProcessHeap(), 0, unix_len )))
1273             return STATUS_NO_MEMORY;
1274         pos = 0;
1275     }
1276
1277     /* try a shortcut first */
1278
1279     ret = ntdll_wcstoumbs( 0, name, name_len, unix_name + pos, unix_len - pos - 1,
1280                            NULL, &used_default );
1281
1282     while (name_len && IS_SEPARATOR(*name))
1283     {
1284         name++;
1285         name_len--;
1286     }
1287
1288     if (ret > 0 && !used_default)  /* if we used the default char the name didn't convert properly */
1289     {
1290         char *p;
1291         unix_name[pos + ret] = 0;
1292         for (p = unix_name + pos ; *p; p++) if (*p == '\\') *p = '/';
1293         if (!stat( unix_name, &st ))
1294         {
1295             /* creation fails with STATUS_ACCESS_DENIED for the root of the drive */
1296             if (disposition == FILE_CREATE)
1297                 return name_len ? STATUS_OBJECT_NAME_COLLISION : STATUS_ACCESS_DENIED;
1298             goto done;
1299         }
1300     }
1301
1302     if (!name_len)  /* empty name -> drive root doesn't exist */
1303     {
1304         RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1305         return STATUS_OBJECT_PATH_NOT_FOUND;
1306     }
1307     if (check_case && (disposition == FILE_OPEN || disposition == FILE_OVERWRITE))
1308     {
1309         RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1310         return STATUS_OBJECT_NAME_NOT_FOUND;
1311     }
1312
1313     /* now do it component by component */
1314
1315     while (name_len)
1316     {
1317         const WCHAR *end, *next;
1318
1319         end = name;
1320         while (end < name + name_len && !IS_SEPARATOR(*end)) end++;
1321         next = end;
1322         while (next < name + name_len && IS_SEPARATOR(*next)) next++;
1323         name_len -= next - name;
1324
1325         /* grow the buffer if needed */
1326
1327         if (unix_len - pos < MAX_DIR_ENTRY_LEN + 2)
1328         {
1329             char *new_name;
1330             unix_len += 2 * MAX_DIR_ENTRY_LEN;
1331             if (!(new_name = RtlReAllocateHeap( GetProcessHeap(), 0, unix_name, unix_len )))
1332             {
1333                 RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1334                 return STATUS_NO_MEMORY;
1335             }
1336             unix_name = new_name;
1337         }
1338
1339         status = find_file_in_dir( unix_name, pos, name, end - name, check_case );
1340
1341         /* if this is the last element, not finding it is not necessarily fatal */
1342         if (!name_len)
1343         {
1344             if (status == STATUS_OBJECT_PATH_NOT_FOUND)
1345             {
1346                 status = STATUS_OBJECT_NAME_NOT_FOUND;
1347                 if (disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
1348                 {
1349                     ret = ntdll_wcstoumbs( 0, name, end - name, unix_name + pos + 1,
1350                                            MAX_DIR_ENTRY_LEN, NULL, &used_default );
1351                     if (ret > 0 && !used_default)
1352                     {
1353                         unix_name[pos] = '/';
1354                         unix_name[pos + 1 + ret] = 0;
1355                         status = STATUS_NO_SUCH_FILE;
1356                         break;
1357                     }
1358                 }
1359             }
1360             else if (status == STATUS_SUCCESS && disposition == FILE_CREATE)
1361             {
1362                 status = STATUS_OBJECT_NAME_COLLISION;
1363             }
1364         }
1365
1366         if (status != STATUS_SUCCESS)
1367         {
1368             /* couldn't find it at all, fail */
1369             WARN( "%s not found in %s\n", debugstr_w(name), unix_name );
1370             RtlFreeHeap( GetProcessHeap(), 0, unix_name );
1371             return status;
1372         }
1373
1374         pos += strlen( unix_name + pos );
1375         name = next;
1376     }
1377
1378     WARN( "%s -> %s required a case-insensitive search\n",
1379           debugstr_us(nameW), debugstr_a(unix_name) );
1380
1381 done:
1382     TRACE( "%s -> %s\n", debugstr_us(nameW), debugstr_a(unix_name) );
1383     unix_name_ret->Buffer = unix_name;
1384     unix_name_ret->Length = strlen(unix_name);
1385     unix_name_ret->MaximumLength = unix_len;
1386     return status;
1387 }
1388
1389
1390 /******************************************************************
1391  *              RtlDoesFileExists_U   (NTDLL.@)
1392  */
1393 BOOLEAN WINAPI RtlDoesFileExists_U(LPCWSTR file_name)
1394 {
1395     UNICODE_STRING nt_name;
1396     ANSI_STRING unix_name;
1397     BOOLEAN ret;
1398
1399     if (!RtlDosPathNameToNtPathName_U( file_name, &nt_name, NULL, NULL )) return FALSE;
1400     ret = (wine_nt_to_unix_file_name( &nt_name, &unix_name, FILE_OPEN, FALSE ) == STATUS_SUCCESS);
1401     if (ret) RtlFreeAnsiString( &unix_name );
1402     RtlFreeUnicodeString( &nt_name );
1403     return ret;
1404 }