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