files/dos_fs.c

   1 /*
   2  * DOS file system functions
   3  *
   4  * Copyright 1993 Erik Bos
   5  * Copyright 1996 Alexandre Julliard
   6  */
   7
   8 #include "config.h"
   9 #include <sys/types.h>
  10 #include <ctype.h>
  11 #include <dirent.h>
  12 #include <errno.h>
  13 #ifdef HAVE_SYS_ERRNO_H
  14 #include <sys/errno.h>
  15 #endif
  16 #include <fcntl.h>
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <sys/stat.h>
  20 #include <sys/ioctl.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23
  24 #include "windef.h"
  25 #include "ntddk.h"
  26 #include "wine/winbase16.h"
  27 #include "wine/unicode.h"
  28 #include "wine/winestring.h"
  29 #include "winerror.h"
  30 #include "drive.h"
  31 #include "file.h"
  32 #include "heap.h"
  33 #include "msdos.h"
  34 #include "syslevel.h"
  35 #include "server.h"
  36 #include "options.h"
  37 #include "debugtools.h"
  38
  39 DEFAULT_DEBUG_CHANNEL(dosfs);
  40 DECLARE_DEBUG_CHANNEL(file);
  41
  42 /* Define the VFAT ioctl to get both short and long file names */
  43 /* FIXME: is it possible to get this to work on other systems? */
  44 #ifdef linux
  45 /* We want the real kernel dirent structure, not the libc one */
  46 typedef struct
  47 {
  48     long d_ino;
  49     long d_off;
  50     unsigned short d_reclen;
  51     char d_name[256];
  52 } KERNEL_DIRENT;
  53
  54 #define VFAT_IOCTL_READDIR_BOTH  _IOR('r', 1, KERNEL_DIRENT [2] )
  55
  56 #else   /* linux */
  57 #undef VFAT_IOCTL_READDIR_BOTH  /* just in case... */
  58 #endif  /* linux */
  59
  60 /* Chars we don't want to see in DOS file names */
  61 #define INVALID_DOS_CHARS  "*?<>|\"+=,;[] \345"
  62
  63 static const DOS_DEVICE DOSFS_Devices[] =
  64 /* name, device flags (see Int 21/AX=0x4400) */
  65 {
  66     { "CON",            0xc0d3 },
  67     { "PRN",            0xa0c0 },
  68     { "NUL",            0x80c4 },
  69     { "AUX",            0x80c0 },
  70     { "LPT1",           0xa0c0 },
  71     { "LPT2",           0xa0c0 },
  72     { "LPT3",           0xa0c0 },
  73     { "LPT4",           0xc0d3 },
  74     { "COM1",           0x80c0 },
  75     { "COM2",           0x80c0 },
  76     { "COM3",           0x80c0 },
  77     { "COM4",           0x80c0 },
  78     { "SCSIMGR$",       0xc0c0 },
  79     { "HPSCAN",         0xc0c0 }
  80 };
  81
  82 #define GET_DRIVE(path) \
  83     (((path)[1] == ':') ? toupper((path)[0]) - 'A' : DOSFS_CurDrive)
  84
  85 /* Directory info for DOSFS_ReadDir */
  86 typedef struct
  87 {
  88     DIR           *dir;
  89 #ifdef VFAT_IOCTL_READDIR_BOTH
  90     int            fd;
  91     char           short_name[12];
  92     KERNEL_DIRENT  dirent[2];
  93 #endif
  94 } DOS_DIR;
  95
  96 /* Info structure for FindFirstFile handle */
  97 typedef struct
  98 {
  99     LPSTR path;
 100     LPSTR long_mask;
 101     LPSTR short_mask;
 102     BYTE  attr;
 103     int   drive;
 104     int   cur_pos;
 105     DOS_DIR *dir;
 106 } FIND_FIRST_INFO;
 107
 108
 109
 110 /***********************************************************************
 111  *           DOSFS_ValidDOSName
 112  *
 113  * Return 1 if Unix file 'name' is also a valid MS-DOS name
 114  * (i.e. contains only valid DOS chars, lower-case only, fits in 8.3 format).
 115  * File name can be terminated by '\0', '\\' or '/'.
 116  */
 117 static int DOSFS_ValidDOSName( const char *name, int ignore_case )
 118 {
 119     static const char invalid_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" INVALID_DOS_CHARS;
 120     const char *p = name;
 121     const char *invalid = ignore_case ? (invalid_chars + 26) : invalid_chars;
 122     int len = 0;
 123
 124     if (*p == '.')
 125     {
 126         /* Check for "." and ".." */
 127         p++;
 128         if (*p == '.') p++;
 129         /* All other names beginning with '.' are invalid */
 130         return (IS_END_OF_NAME(*p));
 131     }
 132     while (!IS_END_OF_NAME(*p))
 133     {
 134         if (strchr( invalid, *p )) return 0;  /* Invalid char */
 135         if (*p == '.') break;  /* Start of the extension */
 136         if (++len > 8) return 0;  /* Name too long */
 137         p++;
 138     }
 139     if (*p != '.') return 1;  /* End of name */
 140     p++;
 141     if (IS_END_OF_NAME(*p)) return 0;  /* Empty extension not allowed */
 142     len = 0;
 143     while (!IS_END_OF_NAME(*p))
 144     {
 145         if (strchr( invalid, *p )) return 0;  /* Invalid char */
 146         if (*p == '.') return 0;  /* Second extension not allowed */
 147         if (++len > 3) return 0;  /* Extension too long */
 148         p++;
 149     }
 150     return 1;
 151 }
 152
 153
 154 /***********************************************************************
 155  *           DOSFS_ToDosFCBFormat
 156  *
 157  * Convert a file name to DOS FCB format (8+3 chars, padded with blanks),
 158  * expanding wild cards and converting to upper-case in the process.
 159  * File name can be terminated by '\0', '\\' or '/'.
 160  * Return FALSE if the name is not a valid DOS name.
 161  * 'buffer' must be at least 12 characters long.
 162  */
 163 BOOL DOSFS_ToDosFCBFormat( LPCSTR name, LPSTR buffer )
 164 {
 165     static const char invalid_chars[] = INVALID_DOS_CHARS;
 166     const char *p = name;
 167     int i;
 168
 169     /* Check for "." and ".." */
 170     if (*p == '.')
 171     {
 172         p++;
 173         strcpy( buffer, ".          " );
 174         if (*p == '.')
 175         {
 176             buffer[1] = '.';
 177             p++;
 178         }
 179         return (!*p || (*p == '/') || (*p == '\\'));
 180     }
 181
 182     for (i = 0; i < 8; i++)
 183     {
 184         switch(*p)
 185         {
 186         case '\0':
 187         case '\\':
 188         case '/':
 189         case '.':
 190             buffer[i] = ' ';
 191             break;
 192         case '?':
 193             p++;
 194             /* fall through */
 195         case '*':
 196             buffer[i] = '?';
 197             break;
 198         default:
 199             if (strchr( invalid_chars, *p )) return FALSE;
 200             buffer[i] = toupper(*p);
 201             p++;
 202             break;
 203         }
 204     }
 205
 206     if (*p == '*')
 207     {
 208         /* Skip all chars after wildcard up to first dot */
 209         while (*p && (*p != '/') && (*p != '\\') && (*p != '.')) p++;
 210     }
 211     else
 212     {
 213         /* Check if name too long */
 214         if (*p && (*p != '/') && (*p != '\\') && (*p != '.')) return FALSE;
 215     }
 216     if (*p == '.') p++;  /* Skip dot */
 217
 218     for (i = 8; i < 11; i++)
 219     {
 220         switch(*p)
 221         {
 222         case '\0':
 223         case '\\':
 224         case '/':
 225             buffer[i] = ' ';
 226             break;
 227         case '.':
 228             return FALSE;  /* Second extension not allowed */
 229         case '?':
 230             p++;
 231             /* fall through */
 232         case '*':
 233             buffer[i] = '?';
 234             break;
 235         default:
 236             if (strchr( invalid_chars, *p )) return FALSE;
 237             buffer[i] = toupper(*p);
 238             p++;
 239             break;
 240         }
 241     }
 242     buffer[11] = '\0';
 243
 244     /* at most 3 character of the extension are processed
 245      * is something behind this ?
 246      */
 247     while (*p == '*' || *p == ' ') p++; /* skip wildcards and spaces */
 248     return IS_END_OF_NAME(*p);
 249 }
 250
 251
 252 /***********************************************************************
 253  *           DOSFS_ToDosDTAFormat
 254  *
 255  * Convert a file name from FCB to DTA format (name.ext, null-terminated)
 256  * converting to upper-case in the process.
 257  * File name can be terminated by '\0', '\\' or '/'.
 258  * 'buffer' must be at least 13 characters long.
 259  */
 260 static void DOSFS_ToDosDTAFormat( LPCSTR name, LPSTR buffer )
 261 {
 262     char *p;
 263
 264     memcpy( buffer, name, 8 );
 265     for (p = buffer + 8; (p > buffer) && (p[-1] == ' '); p--);
 266     *p++ = '.';
 267     memcpy( p, name + 8, 3 );
 268     for (p += 3; p[-1] == ' '; p--);
 269     if (p[-1] == '.') p--;
 270     *p = '\0';
 271 }
 272
 273
 274 /***********************************************************************
 275  *           DOSFS_MatchShort
 276  *
 277  * Check a DOS file name against a mask (both in FCB format).
 278  */
 279 static int DOSFS_MatchShort( const char *mask, const char *name )
 280 {
 281     int i;
 282     for (i = 11; i > 0; i--, mask++, name++)
 283         if ((*mask != '?') && (*mask != *name)) return 0;
 284     return 1;
 285 }
 286
 287
 288 /***********************************************************************
 289  *           DOSFS_MatchLong
 290  *
 291  * Check a long file name against a mask.
 292  *
 293  * Tests (done in W95 DOS shell - case insensitive):
 294  * *.txt                        test1.test.txt                          *
 295  * *st1*                        test1.txt                               *
 296  * *.t??????.t*                 test1.ta.tornado.txt                    *
 297  * *tornado*                    test1.ta.tornado.txt                    *
 298  * t*t                          test1.ta.tornado.txt                    *
 299  * ?est*                        test1.txt                               *
 300  * ?est???                      test1.txt                               -
 301  * *test1.txt*                  test1.txt                               *
 302  * h?l?o*t.dat                  hellothisisatest.dat                    *
 303  */
 304 static int DOSFS_MatchLong( const char *mask, const char *name,
 305                             int case_sensitive )
 306 {
 307     const char *lastjoker = NULL;
 308     const char *next_to_retry = NULL;
 309
 310     if (!strcmp( mask, "*.*" )) return 1;
 311     while (*name && *mask)
 312     {
 313         if (*mask == '*')
 314         {
 315             mask++;
 316             while (*mask == '*') mask++;  /* Skip consecutive '*' */
 317             lastjoker = mask;
 318             if (!*mask) return 1; /* end of mask is all '*', so match */
 319
 320             /* skip to the next match after the joker(s) */
 321             if (case_sensitive) while (*name && (*name != *mask)) name++;
 322             else while (*name && (toupper(*name) != toupper(*mask))) name++;
 323
 324             if (!*name) break;
 325             next_to_retry = name;
 326         }
 327         else if (*mask != '?')
 328         {
 329             int mismatch = 0;
 330             if (case_sensitive)
 331             {
 332                 if (*mask != *name) mismatch = 1;
 333             }
 334             else
 335             {
 336                 if (toupper(*mask) != toupper(*name)) mismatch = 1;
 337             }
 338             if (!mismatch)
 339             {
 340                 mask++;
 341                 name++;
 342                 if (*mask == '\0')
 343                 {
 344                     if (*name == '\0')
 345                         return 1;
 346                     if (lastjoker)
 347                         mask = lastjoker;
 348                 }
 349             }
 350             else /* mismatch ! */
 351             {
 352                 if (lastjoker) /* we had an '*', so we can try unlimitedly */
 353                 {
 354                     mask = lastjoker;
 355
 356                     /* this scan sequence was a mismatch, so restart
 357                      * 1 char after the first char we checked last time */
 358                     next_to_retry++;
 359                     name = next_to_retry;
 360                 }
 361                 else
 362                     return 0; /* bad luck */
 363             }
 364         }
 365         else /* '?' */
 366         {
 367             mask++;
 368             name++;
 369         }
 370     }
 371     while ((*mask == '.') || (*mask == '*'))
 372         mask++;  /* Ignore trailing '.' or '*' in mask */
 373     return (!*name && !*mask);
 374 }
 375
 376
 377 /***********************************************************************
 378  *           DOSFS_OpenDir
 379  */
 380 static DOS_DIR *DOSFS_OpenDir( LPCSTR path )
 381 {
 382     DOS_DIR *dir = HeapAlloc( GetProcessHeap(), 0, sizeof(*dir) );
 383     if (!dir)
 384     {
 385         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 386         return NULL;
 387     }
 388
 389     /* Treat empty path as root directory. This simplifies path split into
 390        directory and mask in several other places */
 391     if (!*path) path = "/";
 392
 393 #ifdef VFAT_IOCTL_READDIR_BOTH
 394
 395     /* Check if the VFAT ioctl is supported on this directory */
 396
 397     if ((dir->fd = open( path, O_RDONLY )) != -1)
 398     {
 399         if (ioctl( dir->fd, VFAT_IOCTL_READDIR_BOTH, (long)dir->dirent ) == -1)
 400         {
 401             close( dir->fd );
 402             dir->fd = -1;
 403         }
 404         else
 405         {
 406             /* Set the file pointer back at the start of the directory */
 407             lseek( dir->fd, 0, SEEK_SET );
 408             dir->dir = NULL;
 409             return dir;
 410         }
 411     }
 412 #endif  /* VFAT_IOCTL_READDIR_BOTH */
 413
 414     /* Now use the standard opendir/readdir interface */
 415
 416     if (!(dir->dir = opendir( path )))
 417     {
 418         HeapFree( GetProcessHeap(), 0, dir );
 419         return NULL;
 420     }
 421     return dir;
 422 }
 423
 424
 425 /***********************************************************************
 426  *           DOSFS_CloseDir
 427  */
 428 static void DOSFS_CloseDir( DOS_DIR *dir )
 429 {
 430 #ifdef VFAT_IOCTL_READDIR_BOTH
 431     if (dir->fd != -1) close( dir->fd );
 432 #endif  /* VFAT_IOCTL_READDIR_BOTH */
 433     if (dir->dir) closedir( dir->dir );
 434     HeapFree( GetProcessHeap(), 0, dir );
 435 }
 436
 437
 438 /***********************************************************************
 439  *           DOSFS_ReadDir
 440  */
 441 static BOOL DOSFS_ReadDir( DOS_DIR *dir, LPCSTR *long_name,
 442                              LPCSTR *short_name )
 443 {
 444     struct dirent *dirent;
 445
 446 #ifdef VFAT_IOCTL_READDIR_BOTH
 447     if (dir->fd != -1)
 448     {
 449         if (ioctl( dir->fd, VFAT_IOCTL_READDIR_BOTH, (long)dir->dirent ) != -1) {
 450             if (!dir->dirent[0].d_reclen) return FALSE;
 451             if (!DOSFS_ToDosFCBFormat( dir->dirent[0].d_name, dir->short_name ))
 452                 dir->short_name[0] = '\0';
 453             *short_name = dir->short_name;
 454             if (dir->dirent[1].d_name[0]) *long_name = dir->dirent[1].d_name;
 455             else *long_name = dir->dirent[0].d_name;
 456             return TRUE;
 457         }
 458     }
 459 #endif  /* VFAT_IOCTL_READDIR_BOTH */
 460
 461     if (!(dirent = readdir( dir->dir ))) return FALSE;
 462     *long_name  = dirent->d_name;
 463     *short_name = NULL;
 464     return TRUE;
 465 }
 466
 467
 468 /***********************************************************************
 469  *           DOSFS_Hash
 470  *
 471  * Transform a Unix file name into a hashed DOS name. If the name is a valid
 472  * DOS name, it is converted to upper-case; otherwise it is replaced by a
 473  * hashed version that fits in 8.3 format.
 474  * File name can be terminated by '\0', '\\' or '/'.
 475  * 'buffer' must be at least 13 characters long.
 476  */
 477 static void DOSFS_Hash( LPCSTR name, LPSTR buffer, BOOL dir_format,
 478                         BOOL ignore_case )
 479 {
 480     static const char invalid_chars[] = INVALID_DOS_CHARS "~.";
 481     static const char hash_chars[32] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345";
 482
 483     const char *p, *ext;
 484     char *dst;
 485     unsigned short hash;
 486     int i;
 487
 488     if (dir_format) strcpy( buffer, "           " );
 489
 490     if (DOSFS_ValidDOSName( name, ignore_case ))
 491     {
 492         /* Check for '.' and '..' */
 493         if (*name == '.')
 494         {
 495             buffer[0] = '.';
 496             if (!dir_format) buffer[1] = buffer[2] = '\0';
 497             if (name[1] == '.') buffer[1] = '.';
 498             return;
 499         }
 500
 501         /* Simply copy the name, converting to uppercase */
 502
 503         for (dst = buffer; !IS_END_OF_NAME(*name) && (*name != '.'); name++)
 504             *dst++ = toupper(*name);
 505         if (*name == '.')
 506         {
 507             if (dir_format) dst = buffer + 8;
 508             else *dst++ = '.';
 509             for (name++; !IS_END_OF_NAME(*name); name++)
 510                 *dst++ = toupper(*name);
 511         }
 512         if (!dir_format) *dst = '\0';
 513         return;
 514     }
 515
 516     /* Compute the hash code of the file name */
 517     /* If you know something about hash functions, feel free to */
 518     /* insert a better algorithm here... */
 519     if (ignore_case)
 520     {
 521         for (p = name, hash = 0xbeef; !IS_END_OF_NAME(p[1]); p++)
 522             hash = (hash<<3) ^ (hash>>5) ^ tolower(*p) ^ (tolower(p[1]) << 8);
 523         hash = (hash<<3) ^ (hash>>5) ^ tolower(*p); /* Last character*/
 524     }
 525     else
 526     {
 527         for (p = name, hash = 0xbeef; !IS_END_OF_NAME(p[1]); p++)
 528             hash = (hash << 3) ^ (hash >> 5) ^ *p ^ (p[1] << 8);
 529         hash = (hash << 3) ^ (hash >> 5) ^ *p;  /* Last character */
 530     }
 531
 532     /* Find last dot for start of the extension */
 533     for (p = name+1, ext = NULL; !IS_END_OF_NAME(*p); p++)
 534         if (*p == '.') ext = p;
 535     if (ext && IS_END_OF_NAME(ext[1]))
 536         ext = NULL;  /* Empty extension ignored */
 537
 538     /* Copy first 4 chars, replacing invalid chars with '_' */
 539     for (i = 4, p = name, dst = buffer; i > 0; i--, p++)
 540     {
 541         if (IS_END_OF_NAME(*p) || (p == ext)) break;
 542         *dst++ = strchr( invalid_chars, *p ) ? '_' : toupper(*p);
 543     }
 544     /* Pad to 5 chars with '~' */
 545     while (i-- >= 0) *dst++ = '~';
 546
 547     /* Insert hash code converted to 3 ASCII chars */
 548     *dst++ = hash_chars[(hash >> 10) & 0x1f];
 549     *dst++ = hash_chars[(hash >> 5) & 0x1f];
 550     *dst++ = hash_chars[hash & 0x1f];
 551
 552     /* Copy the first 3 chars of the extension (if any) */
 553     if (ext)
 554     {
 555         if (!dir_format) *dst++ = '.';
 556         for (i = 3, ext++; (i > 0) && !IS_END_OF_NAME(*ext); i--, ext++)
 557             *dst++ = strchr( invalid_chars, *ext ) ? '_' : toupper(*ext);
 558     }
 559     if (!dir_format) *dst = '\0';
 560 }
 561
 562
 563 /***********************************************************************
 564  *           DOSFS_FindUnixName
 565  *
 566  * Find the Unix file name in a given directory that corresponds to
 567  * a file name (either in Unix or DOS format).
 568  * File name can be terminated by '\0', '\\' or '/'.
 569  * Return TRUE if OK, FALSE if no file name matches.
 570  *
 571  * 'long_buf' must be at least 'long_len' characters long. If the long name
 572  * turns out to be larger than that, the function returns FALSE.
 573  * 'short_buf' must be at least 13 characters long.
 574  */
 575 BOOL DOSFS_FindUnixName( LPCSTR path, LPCSTR name, LPSTR long_buf,
 576                            INT long_len, LPSTR short_buf, BOOL ignore_case)
 577 {
 578     DOS_DIR *dir;
 579     LPCSTR long_name, short_name;
 580     char dos_name[12], tmp_buf[13];
 581     BOOL ret;
 582
 583     const char *p = strchr( name, '/' );
 584     int len = p ? (int)(p - name) : strlen(name);
 585     if ((p = strchr( name, '\\' ))) len = min( (int)(p - name), len );
 586     /* Ignore trailing dots and spaces */
 587     while (len > 1 && (name[len-1] == '.' || name[len-1] == ' ')) len--;
 588     if (long_len < len + 1) return FALSE;
 589
 590     TRACE("%s,%s\n", path, name );
 591
 592     if (!DOSFS_ToDosFCBFormat( name, dos_name )) dos_name[0] = '\0';
 593
 594     if (!(dir = DOSFS_OpenDir( path )))
 595     {
 596         WARN("(%s,%s): can't open dir: %s\n",
 597                        path, name, strerror(errno) );
 598         return FALSE;
 599     }
 600
 601     while ((ret = DOSFS_ReadDir( dir, &long_name, &short_name )))
 602     {
 603         /* Check against Unix name */
 604         if (len == strlen(long_name))
 605         {
 606             if (!ignore_case)
 607             {
 608                 if (!strncmp( long_name, name, len )) break;
 609             }
 610             else
 611             {
 612                 if (!strncasecmp( long_name, name, len )) break;
 613             }
 614         }
 615         if (dos_name[0])
 616         {
 617             /* Check against hashed DOS name */
 618             if (!short_name)
 619             {
 620                 DOSFS_Hash( long_name, tmp_buf, TRUE, ignore_case );
 621                 short_name = tmp_buf;
 622             }
 623             if (!strcmp( dos_name, short_name )) break;
 624         }
 625     }
 626     if (ret)
 627     {
 628         if (long_buf) strcpy( long_buf, long_name );
 629         if (short_buf)
 630         {
 631             if (short_name)
 632                 DOSFS_ToDosDTAFormat( short_name, short_buf );
 633             else
 634                 DOSFS_Hash( long_name, short_buf, FALSE, ignore_case );
 635         }
 636         TRACE("(%s,%s) -> %s (%s)\n",
 637               path, name, long_name, short_buf ? short_buf : "***");
 638     }
 639     else
 640         WARN("'%s' not found in '%s'\n", name, path);
 641     DOSFS_CloseDir( dir );
 642     return ret;
 643 }
 644
 645
 646 /***********************************************************************
 647  *           DOSFS_GetDevice
 648  *
 649  * Check if a DOS file name represents a DOS device and return the device.
 650  */
 651 const DOS_DEVICE *DOSFS_GetDevice( const char *name )
 652 {
 653     int i;
 654     const char *p;
 655
 656     if (!name) return NULL; /* if FILE_DupUnixHandle was used */
 657     if (name[0] && (name[1] == ':')) name += 2;
 658     if ((p = strrchr( name, '/' ))) name = p + 1;
 659     if ((p = strrchr( name, '\\' ))) name = p + 1;
 660     for (i = 0; i < sizeof(DOSFS_Devices)/sizeof(DOSFS_Devices[0]); i++)
 661     {
 662         const char *dev = DOSFS_Devices[i].name;
 663         if (!strncasecmp( dev, name, strlen(dev) ))
 664         {
 665             p = name + strlen( dev );
 666             if (!*p || (*p == '.')) return &DOSFS_Devices[i];
 667         }
 668     }
 669     return NULL;
 670 }
 671
 672
 673 /***********************************************************************
 674  *           DOSFS_GetDeviceByHandle
 675  */
 676 const DOS_DEVICE *DOSFS_GetDeviceByHandle( HFILE hFile )
 677 {
 678     const DOS_DEVICE *ret = NULL;
 679     SERVER_START_REQ
 680     {
 681         struct get_file_info_request *req = server_alloc_req( sizeof(*req), 0 );
 682
 683         req->handle = hFile;
 684         if (!server_call( REQ_GET_FILE_INFO ) && (req->type == FILE_TYPE_UNKNOWN))
 685         {
 686             if ((req->attr >= 0) &&
 687                 (req->attr < sizeof(DOSFS_Devices)/sizeof(DOSFS_Devices[0])))
 688                 ret = &DOSFS_Devices[req->attr];
 689         }
 690     }
 691     SERVER_END_REQ;
 692     return ret;
 693 }
 694
 695
 696 /**************************************************************************
 697  *         DOSFS_CreateCommPort
 698  */
 699 static HANDLE DOSFS_CreateCommPort(LPCSTR name, DWORD access)
 700 {
 701     HANDLE ret = INVALID_HANDLE_VALUE;
 702     char devname[40];
 703
 704     TRACE("%s %lx\n", name, access);
 705
 706     PROFILE_GetWineIniString("serialports",name,"",devname,sizeof devname);
 707     if(!devname[0])
 708         return 0;
 709
 710     TRACE("opening %s as %s\n", devname, name);
 711
 712     SERVER_START_REQ
 713     {
 714         size_t len = strlen(devname);
 715         struct create_serial_request *req = server_alloc_req( sizeof(*req), len );
 716
 717         req->access  = access;
 718         req->inherit = 0;  /*FIXME*/
 719         req->sharing = FILE_SHARE_READ|FILE_SHARE_WRITE;
 720         memcpy( server_data_ptr(req), devname, len );
 721         SetLastError(0);
 722         if (!(server_call( REQ_CREATE_SERIAL ))) ret = req->handle;
 723     }
 724     SERVER_END_REQ;
 725
 726     TRACE("return %08X\n", ret );
 727     return ret;
 728 }
 729
 730 /***********************************************************************
 731  *           DOSFS_OpenDevice
 732  *
 733  * Open a DOS device. This might not map 1:1 into the UNIX device concept.
 734  */
 735 HFILE DOSFS_OpenDevice( const char *name, DWORD access )
 736 {
 737     int i;
 738     const char *p;
 739     HFILE handle;
 740
 741     if (!name) return (HFILE)NULL; /* if FILE_DupUnixHandle was used */
 742     if (name[0] && (name[1] == ':')) name += 2;
 743     if ((p = strrchr( name, '/' ))) name = p + 1;
 744     if ((p = strrchr( name, '\\' ))) name = p + 1;
 745     for (i = 0; i < sizeof(DOSFS_Devices)/sizeof(DOSFS_Devices[0]); i++)
 746     {
 747         const char *dev = DOSFS_Devices[i].name;
 748         if (!strncasecmp( dev, name, strlen(dev) ))
 749         {
 750             p = name + strlen( dev );
 751             if (!*p || (*p == '.')) {
 752                 /* got it */
 753                 if (!strcmp(DOSFS_Devices[i].name,"NUL"))
 754                     return FILE_CreateFile( "/dev/null", access,
 755                                             FILE_SHARE_READ|FILE_SHARE_WRITE, NULL,
 756                                             OPEN_EXISTING, 0, -1, TRUE );
 757                 if (!strcmp(DOSFS_Devices[i].name,"CON")) {
 758                         HFILE to_dup;
 759                         switch (access & (GENERIC_READ|GENERIC_WRITE)) {
 760                         case GENERIC_READ:
 761                                 to_dup = GetStdHandle( STD_INPUT_HANDLE );
 762                                 break;
 763                         case GENERIC_WRITE:
 764                                 to_dup = GetStdHandle( STD_OUTPUT_HANDLE );
 765                                 break;
 766                         default:
 767                                 FIXME("can't open CON read/write\n");
 768                                 return HFILE_ERROR;
 769                                 break;
 770                         }
 771                         if (!DuplicateHandle( GetCurrentProcess(), to_dup, GetCurrentProcess(),
 772                                               &handle, 0, FALSE, DUPLICATE_SAME_ACCESS ))
 773                             handle = HFILE_ERROR;
 774                         return handle;
 775                 }
 776                 if (!strcmp(DOSFS_Devices[i].name,"SCSIMGR$") ||
 777                     !strcmp(DOSFS_Devices[i].name,"HPSCAN"))
 778                 {
 779                     return FILE_CreateDevice( i, access, NULL );
 780                 }
 781
 782                 if( (handle=DOSFS_CreateCommPort(name,access)) )
 783                     return handle;
 784
 785                 FIXME("device open %s not supported (yet)\n",DOSFS_Devices[i].name);
 786                 return HFILE_ERROR;
 787             }
 788         }
 789     }
 790     return HFILE_ERROR;
 791 }
 792
 793
 794 /***********************************************************************
 795  *           DOSFS_GetPathDrive
 796  *
 797  * Get the drive specified by a given path name (DOS or Unix format).
 798  */
 799 static int DOSFS_GetPathDrive( const char **name )
 800 {
 801     int drive;
 802     const char *p = *name;
 803
 804     if (*p && (p[1] == ':'))
 805     {
 806         drive = toupper(*p) - 'A';
 807         *name += 2;
 808     }
 809     else if (*p == '/') /* Absolute Unix path? */
 810     {
 811         if ((drive = DRIVE_FindDriveRoot( name )) == -1)
 812         {
 813             MESSAGE("Warning: %s not accessible from a DOS drive\n", *name );
 814             /* Assume it really was a DOS name */
 815             drive = DRIVE_GetCurrentDrive();
 816         }
 817     }
 818     else drive = DRIVE_GetCurrentDrive();
 819
 820     if (!DRIVE_IsValid(drive))
 821     {
 822         SetLastError( ERROR_INVALID_DRIVE );
 823         return -1;
 824     }
 825     return drive;
 826 }
 827
 828
 829 /***********************************************************************
 830  *           DOSFS_GetFullName
 831  *
 832  * Convert a file name (DOS or mixed DOS/Unix format) to a valid
 833  * Unix name / short DOS name pair.
 834  * Return FALSE if one of the path components does not exist. The last path
 835  * component is only checked if 'check_last' is non-zero.
 836  * The buffers pointed to by 'long_buf' and 'short_buf' must be
 837  * at least MAX_PATHNAME_LEN long.
 838  */
 839 BOOL DOSFS_GetFullName( LPCSTR name, BOOL check_last, DOS_FULL_NAME *full )
 840 {
 841     BOOL found;
 842     UINT flags;
 843     char *p_l, *p_s, *root;
 844
 845     TRACE("%s (last=%d)\n", name, check_last );
 846
 847     if ((full->drive = DOSFS_GetPathDrive( &name )) == -1) return FALSE;
 848     flags = DRIVE_GetFlags( full->drive );
 849
 850     lstrcpynA( full->long_name, DRIVE_GetRoot( full->drive ),
 851                  sizeof(full->long_name) );
 852     if (full->long_name[1]) root = full->long_name + strlen(full->long_name);
 853     else root = full->long_name;  /* root directory */
 854
 855     strcpy( full->short_name, "A:\\" );
 856     full->short_name[0] += full->drive;
 857
 858     if ((*name == '\\') || (*name == '/'))  /* Absolute path */
 859     {
 860         while ((*name == '\\') || (*name == '/')) name++;
 861     }
 862     else  /* Relative path */
 863     {
 864         lstrcpynA( root + 1, DRIVE_GetUnixCwd( full->drive ),
 865                      sizeof(full->long_name) - (root - full->long_name) - 1 );
 866         if (root[1]) *root = '/';
 867         lstrcpynA( full->short_name + 3, DRIVE_GetDosCwd( full->drive ),
 868                      sizeof(full->short_name) - 3 );
 869     }
 870
 871     p_l = full->long_name[1] ? full->long_name + strlen(full->long_name)
 872                              : full->long_name;
 873     p_s = full->short_name[3] ? full->short_name + strlen(full->short_name)
 874                               : full->short_name + 2;
 875     found = TRUE;
 876
 877     while (*name && found)
 878     {
 879         /* Check for '.' and '..' */
 880
 881         if (*name == '.')
 882         {
 883             if (IS_END_OF_NAME(name[1]))
 884             {
 885                 name++;
 886                 while ((*name == '\\') || (*name == '/')) name++;
 887                 continue;
 888             }
 889             else if ((name[1] == '.') && IS_END_OF_NAME(name[2]))
 890             {
 891                 name += 2;
 892                 while ((*name == '\\') || (*name == '/')) name++;
 893                 while ((p_l > root) && (*p_l != '/')) p_l--;
 894                 while ((p_s > full->short_name + 2) && (*p_s != '\\')) p_s--;
 895                 *p_l = *p_s = '\0';  /* Remove trailing separator */
 896                 continue;
 897             }
 898         }
 899
 900         /* Make sure buffers are large enough */
 901
 902         if ((p_s >= full->short_name + sizeof(full->short_name) - 14) ||
 903             (p_l >= full->long_name + sizeof(full->long_name) - 1))
 904         {
 905             SetLastError( ERROR_PATH_NOT_FOUND );
 906             return FALSE;
 907         }
 908
 909         /* Get the long and short name matching the file name */
 910
 911         if ((found = DOSFS_FindUnixName( full->long_name, name, p_l + 1,
 912                          sizeof(full->long_name) - (p_l - full->long_name) - 1,
 913                          p_s + 1, !(flags & DRIVE_CASE_SENSITIVE) )))
 914         {
 915             *p_l++ = '/';
 916             p_l   += strlen(p_l);
 917             *p_s++ = '\\';
 918             p_s   += strlen(p_s);
 919             while (!IS_END_OF_NAME(*name)) name++;
 920         }
 921         else if (!check_last)
 922         {
 923             *p_l++ = '/';
 924             *p_s++ = '\\';
 925             while (!IS_END_OF_NAME(*name) &&
 926                    (p_s < full->short_name + sizeof(full->short_name) - 1) &&
 927                    (p_l < full->long_name + sizeof(full->long_name) - 1))
 928             {
 929                 *p_s++ = tolower(*name);
 930                 /* If the drive is case-sensitive we want to create new */
 931                 /* files in lower-case otherwise we can't reopen them   */
 932                 /* under the same short name. */
 933                 if (flags & DRIVE_CASE_SENSITIVE) *p_l++ = tolower(*name);
 934                 else *p_l++ = *name;
 935                 name++;
 936             }
 937             /* Ignore trailing dots and spaces */
 938             while(p_l[-1] == '.' || p_l[-1] == ' ') {
 939                 --p_l;
 940                 --p_s;
 941             }
 942             *p_l = *p_s = '\0';
 943         }
 944         while ((*name == '\\') || (*name == '/')) name++;
 945     }
 946
 947     if (!found)
 948     {
 949         if (check_last)
 950         {
 951             SetLastError( ERROR_FILE_NOT_FOUND );
 952             return FALSE;
 953         }
 954         if (*name)  /* Not last */
 955         {
 956             SetLastError( ERROR_PATH_NOT_FOUND );
 957             return FALSE;
 958         }
 959     }
 960     if (!full->long_name[0]) strcpy( full->long_name, "/" );
 961     if (!full->short_name[2]) strcpy( full->short_name + 2, "\\" );
 962     TRACE("returning %s = %s\n", full->long_name, full->short_name );
 963     return TRUE;
 964 }
 965
 966
 967 /***********************************************************************
 968  *           GetShortPathNameA   (KERNEL32.271)
 969  *
 970  * NOTES
 971  *  observed:
 972  *  longpath=NULL: LastError=ERROR_INVALID_PARAMETER, ret=0
 973  *  *longpath="" or invalid: LastError=ERROR_BAD_PATHNAME, ret=0
 974  *
 975  * more observations ( with NT 3.51 (WinDD) ):
 976  * longpath <= 8.3 -> just copy longpath to shortpath
 977  * longpath > 8.3  ->
 978  *             a) file does not exist -> return 0, LastError = ERROR_FILE_NOT_FOUND
 979  *             b) file does exist     -> set the short filename.
 980  * - trailing slashes are reproduced in the short name, even if the
 981  *   file is not a directory
 982  * - the absolute/relative path of the short name is reproduced like found
 983  *   in the long name
 984  * - longpath and shortpath may have the same adress
 985  * Peter Ganten, 1999
 986  */
 987 DWORD WINAPI GetShortPathNameA( LPCSTR longpath, LPSTR shortpath,
 988                                   DWORD shortlen )
 989 {
 990     DOS_FULL_NAME full_name;
 991     LPSTR tmpshortpath;
 992     DWORD sp = 0, lp = 0;
 993     int tmplen, drive;
 994     UINT flags;
 995
 996     TRACE("%s\n", debugstr_a(longpath));
 997
 998     if (!longpath) {
 999       SetLastError(ERROR_INVALID_PARAMETER);
1000       return 0;
1001     }
1002     if (!longpath[0]) {
1003       SetLastError(ERROR_BAD_PATHNAME);
1004       return 0;
1005     }
1006
1007     if ( ( tmpshortpath = HeapAlloc ( GetProcessHeap(), 0, MAX_PATHNAME_LEN ) ) == NULL ) {
1008       SetLastError ( ERROR_NOT_ENOUGH_MEMORY );
1009       return 0;
1010     }
1011
1012     /* check for drive letter */
1013     if ( longpath[1] == ':' ) {
1014       tmpshortpath[0] = longpath[0];
1015       tmpshortpath[1] = ':';
1016       sp = 2;
1017     }
1018
1019     if ( ( drive = DOSFS_GetPathDrive ( &longpath )) == -1 ) return 0;
1020     flags = DRIVE_GetFlags ( drive );
1021
1022     while ( longpath[lp] ) {
1023
1024       /* check for path delimiters and reproduce them */
1025       if ( longpath[lp] == '\\' || longpath[lp] == '/' ) {
1026         if (!sp || tmpshortpath[sp-1]!= '\\')
1027         {
1028             /* strip double "\\" */
1029             tmpshortpath[sp] = '\\';
1030             sp++;
1031         }
1032         tmpshortpath[sp]=0;/*terminate string*/
1033         lp++;
1034         continue;
1035       }
1036
1037       tmplen = strcspn ( longpath + lp, "\\/" );
1038       lstrcpynA ( tmpshortpath+sp, longpath + lp, tmplen+1 );
1039
1040       /* Check, if the current element is a valid dos name */
1041       if ( DOSFS_ValidDOSName ( longpath + lp, !(flags & DRIVE_CASE_SENSITIVE) ) ) {
1042         sp += tmplen;
1043         lp += tmplen;
1044         continue;
1045       }
1046
1047       /* Check if the file exists and use the existing file name */
1048       if ( DOSFS_GetFullName ( tmpshortpath, TRUE, &full_name ) ) {
1049         strcpy( tmpshortpath+sp, strrchr ( full_name.short_name, '\\' ) + 1 );
1050         sp += strlen ( tmpshortpath+sp );
1051         lp += tmplen;
1052         continue;
1053       }
1054
1055       TRACE("not found!\n" );
1056       SetLastError ( ERROR_FILE_NOT_FOUND );
1057       return 0;
1058     }
1059     tmpshortpath[sp] = 0;
1060
1061     lstrcpynA ( shortpath, tmpshortpath, shortlen );
1062     TRACE("returning %s\n", debugstr_a(shortpath) );
1063     tmplen = strlen ( tmpshortpath );
1064     HeapFree ( GetProcessHeap(), 0, tmpshortpath );
1065
1066     return tmplen;
1067 }
1068
1069
1070 /***********************************************************************
1071  *           GetShortPathNameW   (KERNEL32.272)
1072  */
1073 DWORD WINAPI GetShortPathNameW( LPCWSTR longpath, LPWSTR shortpath,
1074                                   DWORD shortlen )
1075 {
1076     LPSTR longpathA, shortpathA;
1077     DWORD ret = 0;
1078
1079     longpathA = HEAP_strdupWtoA( GetProcessHeap(), 0, longpath );
1080     shortpathA = HeapAlloc ( GetProcessHeap(), 0, shortlen );
1081
1082     ret = GetShortPathNameA ( longpathA, shortpathA, shortlen );
1083     lstrcpynAtoW ( shortpath, shortpathA, shortlen );
1084
1085     HeapFree( GetProcessHeap(), 0, longpathA );
1086     HeapFree( GetProcessHeap(), 0, shortpathA );
1087
1088     return ret;
1089 }
1090
1091
1092 /***********************************************************************
1093  *           GetLongPathNameA   (KERNEL32.xxx)
1094  */
1095 DWORD WINAPI GetLongPathNameA( LPCSTR shortpath, LPSTR longpath,
1096                                   DWORD longlen )
1097 {
1098     DOS_FULL_NAME full_name;
1099     char *p, *r, *ll, *ss;
1100
1101     if (!DOSFS_GetFullName( shortpath, TRUE, &full_name )) return 0;
1102     lstrcpynA( longpath, full_name.short_name, longlen );
1103
1104     /* Do some hackery to get the long filename. */
1105
1106     if (longpath) {
1107      ss=longpath+strlen(longpath);
1108      ll=full_name.long_name+strlen(full_name.long_name);
1109      p=NULL;
1110      while (ss>=longpath)
1111      {
1112        /* FIXME: aren't we more paranoid, than needed? */
1113        while ((ss[0]=='\\') && (ss>=longpath)) ss--;
1114        p=ss;
1115        while ((ss[0]!='\\') && (ss>=longpath)) ss--;
1116        if (ss>=longpath)
1117          {
1118          /* FIXME: aren't we more paranoid, than needed? */
1119          while ((ll[0]=='/') && (ll>=full_name.long_name)) ll--;
1120          while ((ll[0]!='/') && (ll>=full_name.long_name)) ll--;
1121          if (ll<full_name.long_name)
1122               {
1123               ERR("Bad longname! (ss=%s ll=%s)\n This should never happen !\n"
1124                   ,ss ,ll );
1125               return 0;
1126               }
1127          }
1128      }
1129
1130    /* FIXME: fix for names like "C:\\" (ie. with more '\'s) */
1131       if (p && p[2])
1132         {
1133         p+=1;
1134         if ((p-longpath)>0) longlen -= (p-longpath);
1135         lstrcpynA( p, ll , longlen);
1136
1137         /* Now, change all '/' to '\' */
1138         for (r=p; r<(p+longlen); r++ )
1139           if (r[0]=='/') r[0]='\\';
1140         return strlen(longpath) - strlen(p) + longlen;
1141         }
1142     }
1143
1144     return strlen(longpath);
1145 }
1146
1147
1148 /***********************************************************************
1149  *           GetLongPathNameW   (KERNEL32.269)
1150  */
1151 DWORD WINAPI GetLongPathNameW( LPCWSTR shortpath, LPWSTR longpath,
1152                                   DWORD longlen )
1153 {
1154     DOS_FULL_NAME full_name;
1155     DWORD ret = 0;
1156     LPSTR shortpathA = HEAP_strdupWtoA( GetProcessHeap(), 0, shortpath );
1157
1158     /* FIXME: is it correct to always return a fully qualified short path? */
1159     if (DOSFS_GetFullName( shortpathA, TRUE, &full_name ))
1160     {
1161         ret = strlen( full_name.short_name );
1162         lstrcpynAtoW( longpath, full_name.long_name, longlen );
1163     }
1164     HeapFree( GetProcessHeap(), 0, shortpathA );
1165     return ret;
1166 }
1167
1168
1169 /***********************************************************************
1170  *           DOSFS_DoGetFullPathName
1171  *
1172  * Implementation of GetFullPathNameA/W.
1173  *
1174  * bon@elektron 000331:
1175  * A test for GetFullPathName with many patholotical case
1176  * gives now identical output for Wine and OSR2
1177  */
1178 static DWORD DOSFS_DoGetFullPathName( LPCSTR name, DWORD len, LPSTR result,
1179                                       BOOL unicode )
1180 {
1181     DWORD ret;
1182     DOS_FULL_NAME full_name;
1183     char *p,*q;
1184     const char * root;
1185     char drivecur[]="c:.";
1186     char driveletter=0;
1187     int namelen,drive=0;
1188
1189     if ((strlen(name) >1)&& (name[1]==':'))
1190       /*drive letter given */
1191       {
1192         driveletter = name[0];
1193       }
1194     if ((strlen(name) >2)&& (name[1]==':') &&
1195              ((name[2]=='\\') || (name[2]=='/')))
1196       /*absolute path given */
1197       {
1198         lstrcpynA(full_name.short_name,name,MAX_PATHNAME_LEN);
1199         drive = (int)toupper(name[0]) - 'A';
1200       }
1201     else
1202       {
1203         if (driveletter)
1204           drivecur[0]=driveletter;
1205         else
1206           strcpy(drivecur,".");
1207         if (!DOSFS_GetFullName( drivecur, FALSE, &full_name ))
1208           {
1209             FIXME("internal: error getting drive/path\n");
1210             return 0;
1211           }
1212         /* find path that drive letter substitutes*/
1213         drive = (int)toupper(full_name.short_name[0]) -0x41;
1214         root= DRIVE_GetRoot(drive);
1215         if (!root)
1216           {
1217             FIXME("internal: error getting DOS Drive Root\n");
1218             return 0;
1219           }
1220         p= full_name.long_name +strlen(root);
1221         /* append long name (= unix name) to drive */
1222         lstrcpynA(full_name.short_name+2,p,MAX_PATHNAME_LEN-3);
1223         /* append name to treat */
1224         namelen= strlen(full_name.short_name);
1225         p = (char*)name;
1226         if (driveletter)
1227           p += +2; /* skip drive name when appending */
1228         if (namelen +2  + strlen(p) > MAX_PATHNAME_LEN)
1229           {
1230             FIXME("internal error: buffer too small\n");
1231              return 0;
1232           }
1233         full_name.short_name[namelen++] ='\\';
1234         full_name.short_name[namelen] = 0;
1235         lstrcpynA(full_name.short_name +namelen,p,MAX_PATHNAME_LEN-namelen);
1236       }
1237     /* reverse all slashes */
1238     for (p=full_name.short_name;
1239          p < full_name.short_name+strlen(full_name.short_name);
1240          p++)
1241       {
1242         if ( *p == '/' )
1243           *p = '\\';
1244       }
1245      /* Use memmove, as areas overlap*/
1246      /* Delete .. */
1247     while ((p = strstr(full_name.short_name,"\\..\\")))
1248       {
1249         if (p > full_name.short_name+2)
1250           {
1251             *p = 0;
1252             q = strrchr(full_name.short_name,'\\');
1253             memmove(q+1,p+4,strlen(p+4)+1);
1254           }
1255         else
1256           {
1257             memmove(full_name.short_name+3,p+4,strlen(p+4)+1);
1258           }
1259       }
1260     if ((full_name.short_name[2]=='.')&&(full_name.short_name[3]=='.'))
1261         {
1262           /* This case istn't treated yet : c:..\test */
1263           memmove(full_name.short_name+2,full_name.short_name+4,
1264                   strlen(full_name.short_name+4)+1);
1265         }
1266      /* Delete . */
1267     while ((p = strstr(full_name.short_name,"\\.\\")))
1268       {
1269         *(p+1) = 0;
1270         memmove(p+1,p+3,strlen(p+3)+1);
1271       }
1272     if (!(DRIVE_GetFlags(drive) & DRIVE_CASE_PRESERVING))
1273       _strupr( full_name.short_name );
1274     namelen=strlen(full_name.short_name);
1275     if (!strcmp(full_name.short_name+namelen-3,"\\.."))
1276         {
1277           /* one more starnge case: "c:\test\test1\.."
1278            return "c:\test"*/
1279           *(full_name.short_name+namelen-3)=0;
1280           q = strrchr(full_name.short_name,'\\');
1281           *q =0;
1282         }
1283     if (full_name.short_name[namelen-1]=='.')
1284         full_name.short_name[(namelen--)-1] =0;
1285     if (!driveletter)
1286       if (full_name.short_name[namelen-1]=='\\')
1287         full_name.short_name[(namelen--)-1] =0;
1288     TRACE("got %s\n",full_name.short_name);
1289
1290     /* If the lpBuffer buffer is too small, the return value is the
1291     size of the buffer, in characters, required to hold the path
1292     plus the terminating \0 (tested against win95osr, bon 001118)
1293     . */
1294     ret = strlen(full_name.short_name);
1295     if (ret >= len )
1296       {
1297         /* don't touch anything when the buffer is not large enough */
1298         SetLastError( ERROR_INSUFFICIENT_BUFFER );
1299         return ret+1;
1300       }
1301     if (result)
1302     {
1303         if (unicode)
1304             lstrcpynAtoW( (LPWSTR)result, full_name.short_name, len );
1305         else
1306             lstrcpynA( result, full_name.short_name, len );
1307     }
1308
1309     TRACE("returning '%s'\n", full_name.short_name );
1310     return ret;
1311 }
1312
1313
1314 /***********************************************************************
1315  *           GetFullPathNameA   (KERNEL32.272)
1316  * NOTES
1317  *   if the path closed with '\', *lastpart is 0
1318  */
1319 DWORD WINAPI GetFullPathNameA( LPCSTR name, DWORD len, LPSTR buffer,
1320                                  LPSTR *lastpart )
1321 {
1322     DWORD ret = DOSFS_DoGetFullPathName( name, len, buffer, FALSE );
1323     if (ret && (ret<=len) && buffer && lastpart)
1324     {
1325         LPSTR p = buffer + strlen(buffer);
1326
1327         if (*p != '\\')
1328         {
1329           while ((p > buffer + 2) && (*p != '\\')) p--;
1330           *lastpart = p + 1;
1331         }
1332         else *lastpart = NULL;
1333     }
1334     return ret;
1335 }
1336
1337
1338 /***********************************************************************
1339  *           GetFullPathNameW   (KERNEL32.273)
1340  */
1341 DWORD WINAPI GetFullPathNameW( LPCWSTR name, DWORD len, LPWSTR buffer,
1342                                  LPWSTR *lastpart )
1343 {
1344     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1345     DWORD ret = DOSFS_DoGetFullPathName( nameA, len, (LPSTR)buffer, TRUE );
1346     HeapFree( GetProcessHeap(), 0, nameA );
1347     if (ret && (ret<=len) && buffer && lastpart)
1348     {
1349         LPWSTR p = buffer + strlenW(buffer);
1350         if (*p != (WCHAR)'\\')
1351         {
1352             while ((p > buffer + 2) && (*p != (WCHAR)'\\')) p--;
1353             *lastpart = p + 1;
1354         }
1355         else *lastpart = NULL;
1356     }
1357     return ret;
1358 }
1359
1360 /***********************************************************************
1361  *           DOSFS_FindNextEx
1362  */
1363 static int DOSFS_FindNextEx( FIND_FIRST_INFO *info, WIN32_FIND_DATAA *entry )
1364 {
1365     DWORD attr = info->attr | FA_UNUSED | FA_ARCHIVE | FA_RDONLY | FILE_ATTRIBUTE_SYMLINK;
1366     UINT flags = DRIVE_GetFlags( info->drive );
1367     char *p, buffer[MAX_PATHNAME_LEN];
1368     const char *drive_path;
1369     int drive_root;
1370     LPCSTR long_name, short_name;
1371     BY_HANDLE_FILE_INFORMATION fileinfo;
1372     char dos_name[13];
1373
1374     if ((info->attr & ~(FA_UNUSED | FA_ARCHIVE | FA_RDONLY)) == FA_LABEL)
1375     {
1376         if (info->cur_pos) return 0;
1377         entry->dwFileAttributes  = FILE_ATTRIBUTE_LABEL;
1378         RtlSecondsSince1970ToTime( (time_t)0, &entry->ftCreationTime );
1379         RtlSecondsSince1970ToTime( (time_t)0, &entry->ftLastAccessTime );
1380         RtlSecondsSince1970ToTime( (time_t)0, &entry->ftLastWriteTime );
1381         entry->nFileSizeHigh     = 0;
1382         entry->nFileSizeLow      = 0;
1383         entry->dwReserved0       = 0;
1384         entry->dwReserved1       = 0;
1385         DOSFS_ToDosDTAFormat( DRIVE_GetLabel( info->drive ), entry->cFileName );
1386         strcpy( entry->cAlternateFileName, entry->cFileName );
1387         info->cur_pos++;
1388         TRACE("returning %s (%s) as label\n",
1389                entry->cFileName, entry->cAlternateFileName);
1390         return 1;
1391     }
1392
1393     drive_path = info->path + strlen(DRIVE_GetRoot( info->drive ));
1394     while ((*drive_path == '/') || (*drive_path == '\\')) drive_path++;
1395     drive_root = !*drive_path;
1396
1397     lstrcpynA( buffer, info->path, sizeof(buffer) - 1 );
1398     strcat( buffer, "/" );
1399     p = buffer + strlen(buffer);
1400
1401     while (DOSFS_ReadDir( info->dir, &long_name, &short_name ))
1402     {
1403         info->cur_pos++;
1404
1405         /* Don't return '.' and '..' in the root of the drive */
1406         if (drive_root && (long_name[0] == '.') &&
1407             (!long_name[1] || ((long_name[1] == '.') && !long_name[2])))
1408             continue;
1409
1410         /* Check the long mask */
1411
1412         if (info->long_mask)
1413         {
1414             if (!DOSFS_MatchLong( info->long_mask, long_name,
1415                                   flags & DRIVE_CASE_SENSITIVE )) continue;
1416         }
1417
1418         /* Check the short mask */
1419
1420         if (info->short_mask)
1421         {
1422             if (!short_name)
1423             {
1424                 DOSFS_Hash( long_name, dos_name, TRUE,
1425                             !(flags & DRIVE_CASE_SENSITIVE) );
1426                 short_name = dos_name;
1427             }
1428             if (!DOSFS_MatchShort( info->short_mask, short_name )) continue;
1429         }
1430
1431         /* Check the file attributes */
1432
1433         lstrcpynA( p, long_name, sizeof(buffer) - (int)(p - buffer) );
1434         if (!FILE_Stat( buffer, &fileinfo ))
1435         {
1436             WARN("can't stat %s\n", buffer);
1437             continue;
1438         }
1439         if ((fileinfo.dwFileAttributes & FILE_ATTRIBUTE_SYMLINK) &&
1440             (fileinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
1441         {
1442             static int show_dir_symlinks = -1;
1443             if (show_dir_symlinks == -1)
1444                 show_dir_symlinks = PROFILE_GetWineIniBool("wine", "ShowDirSymlinks", 0);
1445             if (!show_dir_symlinks) continue;
1446         }
1447
1448         if (fileinfo.dwFileAttributes & ~attr) continue;
1449
1450         /* We now have a matching entry; fill the result and return */
1451
1452         entry->dwFileAttributes = fileinfo.dwFileAttributes;
1453         entry->ftCreationTime   = fileinfo.ftCreationTime;
1454         entry->ftLastAccessTime = fileinfo.ftLastAccessTime;
1455         entry->ftLastWriteTime  = fileinfo.ftLastWriteTime;
1456         entry->nFileSizeHigh    = fileinfo.nFileSizeHigh;
1457         entry->nFileSizeLow     = fileinfo.nFileSizeLow;
1458
1459         if (short_name)
1460             DOSFS_ToDosDTAFormat( short_name, entry->cAlternateFileName );
1461         else
1462             DOSFS_Hash( long_name, entry->cAlternateFileName, FALSE,
1463                         !(flags & DRIVE_CASE_SENSITIVE) );
1464
1465         lstrcpynA( entry->cFileName, long_name, sizeof(entry->cFileName) );
1466         if (!(flags & DRIVE_CASE_PRESERVING)) _strlwr( entry->cFileName );
1467         TRACE("returning %s (%s) %02lx %ld\n",
1468               entry->cFileName, entry->cAlternateFileName,
1469               entry->dwFileAttributes, entry->nFileSizeLow );
1470         return 1;
1471     }
1472     return 0;  /* End of directory */
1473 }
1474
1475 /***********************************************************************
1476  *           DOSFS_FindNext
1477  *
1478  * Find the next matching file. Return the number of entries read to find
1479  * the matching one, or 0 if no more entries.
1480  * 'short_mask' is the 8.3 mask (in FCB format), 'long_mask' is the long
1481  * file name mask. Either or both can be NULL.
1482  *
1483  * NOTE: This is supposed to be only called by the int21 emulation
1484  *       routines. Thus, we should own the Win16Mutex anyway.
1485  *       Nevertheless, we explicitly enter it to ensure the static
1486  *       directory cache is protected.
1487  */
1488 int DOSFS_FindNext( const char *path, const char *short_mask,
1489                     const char *long_mask, int drive, BYTE attr,
1490                     int skip, WIN32_FIND_DATAA *entry )
1491 {
1492     static FIND_FIRST_INFO info = { NULL };
1493     LPCSTR short_name, long_name;
1494     int count;
1495
1496     SYSLEVEL_EnterWin16Lock();
1497
1498     /* Check the cached directory */
1499     if (!(info.dir && info.path == path && info.short_mask == short_mask
1500                    && info.long_mask == long_mask && info.drive == drive
1501                    && info.attr == attr && info.cur_pos <= skip))
1502     {
1503         /* Not in the cache, open it anew */
1504         if (info.dir) DOSFS_CloseDir( info.dir );
1505
1506         info.path = (LPSTR)path;
1507         info.long_mask = (LPSTR)long_mask;
1508         info.short_mask = (LPSTR)short_mask;
1509         info.attr = attr;
1510         info.drive = drive;
1511         info.cur_pos = 0;
1512         info.dir = DOSFS_OpenDir( info.path );
1513     }
1514
1515     /* Skip to desired position */
1516     while (info.cur_pos < skip)
1517         if (info.dir && DOSFS_ReadDir( info.dir, &long_name, &short_name ))
1518             info.cur_pos++;
1519         else
1520             break;
1521
1522     if (info.dir && info.cur_pos == skip && DOSFS_FindNextEx( &info, entry ))
1523         count = info.cur_pos - skip;
1524     else
1525         count = 0;
1526
1527     if (!count)
1528     {
1529         if (info.dir) DOSFS_CloseDir( info.dir );
1530         memset( &info, '\0', sizeof(info) );
1531     }
1532
1533     SYSLEVEL_LeaveWin16Lock();
1534
1535     return count;
1536 }
1537
1538 /*************************************************************************
1539  *           FindFirstFileExA  (KERNEL32)
1540  */
1541 HANDLE WINAPI FindFirstFileExA(
1542         LPCSTR lpFileName,
1543         FINDEX_INFO_LEVELS fInfoLevelId,
1544         LPVOID lpFindFileData,
1545         FINDEX_SEARCH_OPS fSearchOp,
1546         LPVOID lpSearchFilter,
1547         DWORD dwAdditionalFlags)
1548 {
1549     DOS_FULL_NAME full_name;
1550     HGLOBAL handle;
1551     FIND_FIRST_INFO *info;
1552
1553     if ((fSearchOp != FindExSearchNameMatch) || (dwAdditionalFlags != 0))
1554     {
1555         FIXME("options not implemented 0x%08x 0x%08lx\n", fSearchOp, dwAdditionalFlags );
1556         return INVALID_HANDLE_VALUE;
1557     }
1558
1559     switch(fInfoLevelId)
1560     {
1561       case FindExInfoStandard:
1562         {
1563           WIN32_FIND_DATAA * data = (WIN32_FIND_DATAA *) lpFindFileData;
1564           data->dwReserved0 = data->dwReserved1 = 0x0;
1565           if (!lpFileName) return 0;
1566           if (!DOSFS_GetFullName( lpFileName, FALSE, &full_name )) break;
1567           if (!(handle = GlobalAlloc(GMEM_MOVEABLE, sizeof(FIND_FIRST_INFO)))) break;
1568           info = (FIND_FIRST_INFO *)GlobalLock( handle );
1569           info->path = HEAP_strdupA( GetProcessHeap(), 0, full_name.long_name );
1570           info->long_mask = strrchr( info->path, '/' );
1571           *(info->long_mask++) = '\0';
1572           info->short_mask = NULL;
1573           info->attr = 0xff;
1574           if (lpFileName[0] && (lpFileName[1] == ':'))
1575               info->drive = toupper(*lpFileName) - 'A';
1576           else info->drive = DRIVE_GetCurrentDrive();
1577           info->cur_pos = 0;
1578
1579           info->dir = DOSFS_OpenDir( info->path );
1580
1581           GlobalUnlock( handle );
1582           if (!FindNextFileA( handle, data ))
1583           {
1584               FindClose( handle );
1585               SetLastError( ERROR_NO_MORE_FILES );
1586               break;
1587           }
1588           return handle;
1589         }
1590         break;
1591       default:
1592         FIXME("fInfoLevelId 0x%08x not implemented\n", fInfoLevelId );
1593     }
1594     return INVALID_HANDLE_VALUE;
1595 }
1596
1597 /*************************************************************************
1598  *           FindFirstFileA   (KERNEL32.123)
1599  */
1600 HANDLE WINAPI FindFirstFileA(
1601         LPCSTR lpFileName,
1602         WIN32_FIND_DATAA *lpFindData )
1603 {
1604     return FindFirstFileExA(lpFileName, FindExInfoStandard, lpFindData,
1605                             FindExSearchNameMatch, NULL, 0);
1606 }
1607
1608 /*************************************************************************
1609  *           FindFirstFileExW   (KERNEL32)
1610  */
1611 HANDLE WINAPI FindFirstFileExW(
1612         LPCWSTR lpFileName,
1613         FINDEX_INFO_LEVELS fInfoLevelId,
1614         LPVOID lpFindFileData,
1615         FINDEX_SEARCH_OPS fSearchOp,
1616         LPVOID lpSearchFilter,
1617         DWORD dwAdditionalFlags)
1618 {
1619     HANDLE handle;
1620     WIN32_FIND_DATAA dataA;
1621     LPVOID _lpFindFileData;
1622     LPSTR pathA;
1623
1624     switch(fInfoLevelId)
1625     {
1626       case FindExInfoStandard:
1627         {
1628           _lpFindFileData = &dataA;
1629         }
1630         break;
1631       default:
1632         FIXME("fInfoLevelId 0x%08x not implemented\n", fInfoLevelId );
1633         return INVALID_HANDLE_VALUE;
1634     }
1635
1636     pathA = HEAP_strdupWtoA( GetProcessHeap(), 0, lpFileName );
1637     handle = FindFirstFileExA(pathA, fInfoLevelId, _lpFindFileData, fSearchOp, lpSearchFilter, dwAdditionalFlags);
1638     HeapFree( GetProcessHeap(), 0, pathA );
1639     if (handle == INVALID_HANDLE_VALUE) return handle;
1640
1641     switch(fInfoLevelId)
1642     {
1643       case FindExInfoStandard:
1644         {
1645           WIN32_FIND_DATAW *dataW = (WIN32_FIND_DATAW*) lpFindFileData;
1646           dataW->dwFileAttributes = dataA.dwFileAttributes;
1647           dataW->ftCreationTime   = dataA.ftCreationTime;
1648           dataW->ftLastAccessTime = dataA.ftLastAccessTime;
1649           dataW->ftLastWriteTime  = dataA.ftLastWriteTime;
1650           dataW->nFileSizeHigh    = dataA.nFileSizeHigh;
1651           dataW->nFileSizeLow     = dataA.nFileSizeLow;
1652           MultiByteToWideChar( CP_ACP, 0, dataA.cFileName, -1,
1653                                dataW->cFileName, sizeof(dataW->cFileName)/sizeof(WCHAR) );
1654           MultiByteToWideChar( CP_ACP, 0, dataA.cAlternateFileName, -1,
1655                                dataW->cAlternateFileName,
1656                                sizeof(dataW->cAlternateFileName)/sizeof(WCHAR) );
1657         }
1658         break;
1659       default:
1660         FIXME("fInfoLevelId 0x%08x not implemented\n", fInfoLevelId );
1661         return INVALID_HANDLE_VALUE;
1662     }
1663     return handle;
1664 }
1665
1666 /*************************************************************************
1667  *           FindFirstFileW   (KERNEL32.124)
1668  */
1669 HANDLE WINAPI FindFirstFileW( LPCWSTR lpFileName, WIN32_FIND_DATAW *lpFindData )
1670 {
1671     return FindFirstFileExW(lpFileName, FindExInfoStandard, lpFindData,
1672                             FindExSearchNameMatch, NULL, 0);
1673 }
1674
1675 /*************************************************************************
1676  *           FindNextFileA   (KERNEL32.126)
1677  */
1678 BOOL WINAPI FindNextFileA( HANDLE handle, WIN32_FIND_DATAA *data )
1679 {
1680     FIND_FIRST_INFO *info;
1681
1682     if ((handle == INVALID_HANDLE_VALUE) ||
1683        !(info = (FIND_FIRST_INFO *)GlobalLock( handle )))
1684     {
1685         SetLastError( ERROR_INVALID_HANDLE );
1686         return FALSE;
1687     }
1688     GlobalUnlock( handle );
1689     if (!info->path || !info->dir)
1690     {
1691         SetLastError( ERROR_NO_MORE_FILES );
1692         return FALSE;
1693     }
1694     if (!DOSFS_FindNextEx( info, data ))
1695     {
1696         DOSFS_CloseDir( info->dir ); info->dir = NULL;
1697         HeapFree( GetProcessHeap(), 0, info->path );
1698         info->path = info->long_mask = NULL;
1699         SetLastError( ERROR_NO_MORE_FILES );
1700         return FALSE;
1701     }
1702     return TRUE;
1703 }
1704
1705
1706 /*************************************************************************
1707  *           FindNextFileW   (KERNEL32.127)
1708  */
1709 BOOL WINAPI FindNextFileW( HANDLE handle, WIN32_FIND_DATAW *data )
1710 {
1711     WIN32_FIND_DATAA dataA;
1712     if (!FindNextFileA( handle, &dataA )) return FALSE;
1713     data->dwFileAttributes = dataA.dwFileAttributes;
1714     data->ftCreationTime   = dataA.ftCreationTime;
1715     data->ftLastAccessTime = dataA.ftLastAccessTime;
1716     data->ftLastWriteTime  = dataA.ftLastWriteTime;
1717     data->nFileSizeHigh    = dataA.nFileSizeHigh;
1718     data->nFileSizeLow     = dataA.nFileSizeLow;
1719     MultiByteToWideChar( CP_ACP, 0, dataA.cFileName, -1,
1720                          data->cFileName, sizeof(data->cFileName)/sizeof(WCHAR) );
1721     MultiByteToWideChar( CP_ACP, 0, dataA.cAlternateFileName, -1,
1722                          data->cAlternateFileName,
1723                          sizeof(data->cAlternateFileName)/sizeof(WCHAR) );
1724     return TRUE;
1725 }
1726
1727 /*************************************************************************
1728  *           FindClose   (KERNEL32.119)
1729  */
1730 BOOL WINAPI FindClose( HANDLE handle )
1731 {
1732     FIND_FIRST_INFO *info;
1733
1734     if ((handle == INVALID_HANDLE_VALUE) ||
1735         !(info = (FIND_FIRST_INFO *)GlobalLock( handle )))
1736     {
1737         SetLastError( ERROR_INVALID_HANDLE );
1738         return FALSE;
1739     }
1740     if (info->dir) DOSFS_CloseDir( info->dir );
1741     if (info->path) HeapFree( GetProcessHeap(), 0, info->path );
1742     GlobalUnlock( handle );
1743     GlobalFree( handle );
1744     return TRUE;
1745 }
1746
1747 /***********************************************************************
1748  *           DOSFS_UnixTimeToFileTime
1749  *
1750  * Convert a Unix time to FILETIME format.
1751  * The FILETIME structure is a 64-bit value representing the number of
1752  * 100-nanosecond intervals since January 1, 1601, 0:00.
1753  * 'remainder' is the nonnegative number of 100-ns intervals
1754  * corresponding to the time fraction smaller than 1 second that
1755  * couldn't be stored in the time_t value.
1756  */
1757 void DOSFS_UnixTimeToFileTime( time_t unix_time, FILETIME *filetime,
1758                                DWORD remainder )
1759 {
1760     /* NOTES:
1761
1762        CONSTANTS:
1763        The time difference between 1 January 1601, 00:00:00 and
1764        1 January 1970, 00:00:00 is 369 years, plus the leap years
1765        from 1604 to 1968, excluding 1700, 1800, 1900.
1766        This makes (1968 - 1600) / 4 - 3 = 89 leap days, and a total
1767        of 134774 days.
1768
1769        Any day in that period had 24 * 60 * 60 = 86400 seconds.
1770
1771        The time difference is 134774 * 86400 * 10000000, which can be written
1772        116444736000000000
1773        27111902 * 2^32 + 3577643008
1774        413 * 2^48 + 45534 * 2^32 + 54590 * 2^16 + 32768
1775
1776        If you find that these constants are buggy, please change them in all
1777        instances in both conversion functions.
1778
1779        VERSIONS:
1780        There are two versions, one of them uses long long variables and
1781        is presumably faster but not ISO C. The other one uses standard C
1782        data types and operations but relies on the assumption that negative
1783        numbers are stored as 2's complement (-1 is 0xffff....). If this
1784        assumption is violated, dates before 1970 will not convert correctly.
1785        This should however work on any reasonable architecture where WINE
1786        will run.
1787
1788        DETAILS:
1789
1790        Take care not to remove the casts. I have tested these functions
1791        (in both versions) for a lot of numbers. I would be interested in
1792        results on other compilers than GCC.
1793
1794        The operations have been designed to account for the possibility
1795        of 64-bit time_t in future UNICES. Even the versions without
1796        internal long long numbers will work if time_t only is 64 bit.
1797        A 32-bit shift, which was necessary for that operation, turned out
1798        not to work correctly in GCC, besides giving the warning. So I
1799        used a double 16-bit shift instead. Numbers are in the ISO version
1800        represented by three limbs, the most significant with 32 bit, the
1801        other two with 16 bit each.
1802
1803        As the modulo-operator % is not well-defined for negative numbers,
1804        negative divisors have been avoided in DOSFS_FileTimeToUnixTime.
1805
1806        There might be quicker ways to do this in C. Certainly so in
1807        assembler.
1808
1809        Claus Fischer, fischer@iue.tuwien.ac.at
1810        */
1811
1812 #if SIZEOF_LONG_LONG >= 8
1813 #  define USE_LONG_LONG 1
1814 #else
1815 #  define USE_LONG_LONG 0
1816 #endif
1817
1818 #if USE_LONG_LONG               /* gcc supports long long type */
1819
1820     long long int t = unix_time;
1821     t *= 10000000;
1822     t += 116444736000000000LL;
1823     t += remainder;
1824     filetime->dwLowDateTime  = (UINT)t;
1825     filetime->dwHighDateTime = (UINT)(t >> 32);
1826
1827 #else  /* ISO version */
1828
1829     UINT a0;                    /* 16 bit, low    bits */
1830     UINT a1;                    /* 16 bit, medium bits */
1831     UINT a2;                    /* 32 bit, high   bits */
1832
1833     /* Copy the unix time to a2/a1/a0 */
1834     a0 =  unix_time & 0xffff;
1835     a1 = (unix_time >> 16) & 0xffff;
1836     /* This is obsolete if unix_time is only 32 bits, but it does not hurt.
1837        Do not replace this by >> 32, it gives a compiler warning and it does
1838        not work. */
1839     a2 = (unix_time >= 0 ? (unix_time >> 16) >> 16 :
1840           ~((~unix_time >> 16) >> 16));
1841
1842     /* Multiply a by 10000000 (a = a2/a1/a0)
1843        Split the factor into 10000 * 1000 which are both less than 0xffff. */
1844     a0 *= 10000;
1845     a1 = a1 * 10000 + (a0 >> 16);
1846     a2 = a2 * 10000 + (a1 >> 16);
1847     a0 &= 0xffff;
1848     a1 &= 0xffff;
1849
1850     a0 *= 1000;
1851     a1 = a1 * 1000 + (a0 >> 16);
1852     a2 = a2 * 1000 + (a1 >> 16);
1853     a0 &= 0xffff;
1854     a1 &= 0xffff;
1855
1856     /* Add the time difference and the remainder */
1857     a0 += 32768 + (remainder & 0xffff);
1858     a1 += 54590 + (remainder >> 16   ) + (a0 >> 16);
1859     a2 += 27111902                     + (a1 >> 16);
1860     a0 &= 0xffff;
1861     a1 &= 0xffff;
1862
1863     /* Set filetime */
1864     filetime->dwLowDateTime  = (a1 << 16) + a0;
1865     filetime->dwHighDateTime = a2;
1866 #endif
1867 }
1868
1869
1870 /***********************************************************************
1871  *           DOSFS_FileTimeToUnixTime
1872  *
1873  * Convert a FILETIME format to Unix time.
1874  * If not NULL, 'remainder' contains the fractional part of the filetime,
1875  * in the range of [0..9999999] (even if time_t is negative).
1876  */
1877 time_t DOSFS_FileTimeToUnixTime( const FILETIME *filetime, DWORD *remainder )
1878 {
1879     /* Read the comment in the function DOSFS_UnixTimeToFileTime. */
1880 #if USE_LONG_LONG
1881
1882     long long int t = filetime->dwHighDateTime;
1883     t <<= 32;
1884     t += (UINT)filetime->dwLowDateTime;
1885     t -= 116444736000000000LL;
1886     if (t < 0)
1887     {
1888         if (remainder) *remainder = 9999999 - (-t - 1) % 10000000;
1889         return -1 - ((-t - 1) / 10000000);
1890     }
1891     else
1892     {
1893         if (remainder) *remainder = t % 10000000;
1894         return t / 10000000;
1895     }
1896
1897 #else  /* ISO version */
1898
1899     UINT a0;                    /* 16 bit, low    bits */
1900     UINT a1;                    /* 16 bit, medium bits */
1901     UINT a2;                    /* 32 bit, high   bits */
1902     UINT r;                     /* remainder of division */
1903     unsigned int carry;         /* carry bit for subtraction */
1904     int negative;               /* whether a represents a negative value */
1905
1906     /* Copy the time values to a2/a1/a0 */
1907     a2 =  (UINT)filetime->dwHighDateTime;
1908     a1 = ((UINT)filetime->dwLowDateTime ) >> 16;
1909     a0 = ((UINT)filetime->dwLowDateTime ) & 0xffff;
1910
1911     /* Subtract the time difference */
1912     if (a0 >= 32768           ) a0 -=             32768        , carry = 0;
1913     else                        a0 += (1 << 16) - 32768        , carry = 1;
1914
1915     if (a1 >= 54590    + carry) a1 -=             54590 + carry, carry = 0;
1916     else                        a1 += (1 << 16) - 54590 - carry, carry = 1;
1917
1918     a2 -= 27111902 + carry;
1919
1920     /* If a is negative, replace a by (-1-a) */
1921     negative = (a2 >= ((UINT)1) << 31);
1922     if (negative)
1923     {
1924         /* Set a to -a - 1 (a is a2/a1/a0) */
1925         a0 = 0xffff - a0;
1926         a1 = 0xffff - a1;
1927         a2 = ~a2;
1928     }
1929
1930     /* Divide a by 10000000 (a = a2/a1/a0), put the rest into r.
1931        Split the divisor into 10000 * 1000 which are both less than 0xffff. */
1932     a1 += (a2 % 10000) << 16;
1933     a2 /=       10000;
1934     a0 += (a1 % 10000) << 16;
1935     a1 /=       10000;
1936     r   =  a0 % 10000;
1937     a0 /=       10000;
1938
1939     a1 += (a2 % 1000) << 16;
1940     a2 /=       1000;
1941     a0 += (a1 % 1000) << 16;
1942     a1 /=       1000;
1943     r  += (a0 % 1000) * 10000;
1944     a0 /=       1000;
1945
1946     /* If a was negative, replace a by (-1-a) and r by (9999999 - r) */
1947     if (negative)
1948     {
1949         /* Set a to -a - 1 (a is a2/a1/a0) */
1950         a0 = 0xffff - a0;
1951         a1 = 0xffff - a1;
1952         a2 = ~a2;
1953
1954         r  = 9999999 - r;
1955     }
1956
1957     if (remainder) *remainder = r;
1958
1959     /* Do not replace this by << 32, it gives a compiler warning and it does
1960        not work. */
1961     return ((((time_t)a2) << 16) << 16) + (a1 << 16) + a0;
1962 #endif
1963 }
1964
1965
1966 /***********************************************************************
1967  *           MulDiv   (KERNEL32.391)
1968  * RETURNS
1969  *      Result of multiplication and division
1970  *      -1: Overflow occurred or Divisor was 0
1971  */
1972 INT WINAPI MulDiv(
1973              INT nMultiplicand,
1974              INT nMultiplier,
1975              INT nDivisor)
1976 {
1977 #if SIZEOF_LONG_LONG >= 8
1978     long long ret;
1979
1980     if (!nDivisor) return -1;
1981
1982     /* We want to deal with a positive divisor to simplify the logic. */
1983     if (nDivisor < 0)
1984     {
1985       nMultiplicand = - nMultiplicand;
1986       nDivisor = -nDivisor;
1987     }
1988
1989     /* If the result is positive, we "add" to round. else, we subtract to round. */
1990     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
1991          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
1992       ret = (((long long)nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
1993     else
1994       ret = (((long long)nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
1995
1996     if ((ret > 2147483647) || (ret < -2147483647)) return -1;
1997     return ret;
1998 #else
1999     if (!nDivisor) return -1;
2000
2001     /* We want to deal with a positive divisor to simplify the logic. */
2002     if (nDivisor < 0)
2003     {
2004       nMultiplicand = - nMultiplicand;
2005       nDivisor = -nDivisor;
2006     }
2007
2008     /* If the result is positive, we "add" to round. else, we subtract to round. */
2009     if ( ( (nMultiplicand <  0) && (nMultiplier <  0) ) ||
2010          ( (nMultiplicand >= 0) && (nMultiplier >= 0) ) )
2011       return ((nMultiplicand * nMultiplier) + (nDivisor/2)) / nDivisor;
2012
2013     return ((nMultiplicand * nMultiplier) - (nDivisor/2)) / nDivisor;
2014
2015 #endif
2016 }
2017
2018
2019 /***********************************************************************
2020  *           DosDateTimeToFileTime   (KERNEL32.76)
2021  */
2022 BOOL WINAPI DosDateTimeToFileTime( WORD fatdate, WORD fattime, LPFILETIME ft)
2023 {
2024     struct tm newtm;
2025
2026     newtm.tm_sec  = (fattime & 0x1f) * 2;
2027     newtm.tm_min  = (fattime >> 5) & 0x3f;
2028     newtm.tm_hour = (fattime >> 11);
2029     newtm.tm_mday = (fatdate & 0x1f);
2030     newtm.tm_mon  = ((fatdate >> 5) & 0x0f) - 1;
2031     newtm.tm_year = (fatdate >> 9) + 80;
2032     RtlSecondsSince1970ToTime( mktime( &newtm ), ft );
2033     return TRUE;
2034 }
2035
2036
2037 /***********************************************************************
2038  *           FileTimeToDosDateTime   (KERNEL32.111)
2039  */
2040 BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, LPWORD fatdate,
2041                                      LPWORD fattime )
2042 {
2043     time_t unixtime = DOSFS_FileTimeToUnixTime( ft, NULL );
2044     struct tm *tm = localtime( &unixtime );
2045     if (fattime)
2046         *fattime = (tm->tm_hour << 11) + (tm->tm_min << 5) + (tm->tm_sec / 2);
2047     if (fatdate)
2048         *fatdate = ((tm->tm_year - 80) << 9) + ((tm->tm_mon + 1) << 5)
2049                    + tm->tm_mday;
2050     return TRUE;
2051 }
2052
2053
2054 /***********************************************************************
2055  *           LocalFileTimeToFileTime   (KERNEL32.373)
2056  */
2057 BOOL WINAPI LocalFileTimeToFileTime( const FILETIME *localft,
2058                                        LPFILETIME utcft )
2059 {
2060     struct tm *xtm;
2061     DWORD remainder;
2062
2063     /* convert from local to UTC. Perhaps not correct. FIXME */
2064     time_t unixtime = DOSFS_FileTimeToUnixTime( localft, &remainder );
2065     xtm = gmtime( &unixtime );
2066     DOSFS_UnixTimeToFileTime( mktime(xtm), utcft, remainder );
2067     return TRUE;
2068 }
2069
2070
2071 /***********************************************************************
2072  *           FileTimeToLocalFileTime   (KERNEL32.112)
2073  */
2074 BOOL WINAPI FileTimeToLocalFileTime( const FILETIME *utcft,
2075                                        LPFILETIME localft )
2076 {
2077     DWORD remainder;
2078     /* convert from UTC to local. Perhaps not correct. FIXME */
2079     time_t unixtime = DOSFS_FileTimeToUnixTime( utcft, &remainder );
2080 #ifdef HAVE_TIMEGM
2081     struct tm *xtm = localtime( &unixtime );
2082     time_t localtime;
2083
2084     localtime = timegm(xtm);
2085     DOSFS_UnixTimeToFileTime( localtime, localft, remainder );
2086
2087 #else
2088     struct tm *xtm,*gtm;
2089     time_t time1,time2;
2090
2091     xtm = localtime( &unixtime );
2092     gtm = gmtime( &unixtime );
2093     time1 = mktime(xtm);
2094     time2 = mktime(gtm);
2095     DOSFS_UnixTimeToFileTime( 2*time1-time2, localft, remainder );
2096 #endif
2097     return TRUE;
2098 }
2099
2100
2101 /***********************************************************************
2102  *           FileTimeToSystemTime   (KERNEL32.113)
2103  */
2104 BOOL WINAPI FileTimeToSystemTime( const FILETIME *ft, LPSYSTEMTIME syst )
2105 {
2106     struct tm *xtm;
2107     DWORD remainder;
2108     time_t xtime = DOSFS_FileTimeToUnixTime( ft, &remainder );
2109     xtm = gmtime(&xtime);
2110     syst->wYear         = xtm->tm_year+1900;
2111     syst->wMonth        = xtm->tm_mon + 1;
2112     syst->wDayOfWeek    = xtm->tm_wday;
2113     syst->wDay          = xtm->tm_mday;
2114     syst->wHour         = xtm->tm_hour;
2115     syst->wMinute       = xtm->tm_min;
2116     syst->wSecond       = xtm->tm_sec;
2117     syst->wMilliseconds = remainder / 10000;
2118     return TRUE;
2119 }
2120
2121 /***********************************************************************
2122  *           QueryDosDeviceA   (KERNEL32.413)
2123  *
2124  * returns array of strings terminated by \0, terminated by \0
2125  */
2126 DWORD WINAPI QueryDosDeviceA(LPCSTR devname,LPSTR target,DWORD bufsize)
2127 {
2128     LPSTR s;
2129     char  buffer[200];
2130
2131     TRACE("(%s,...)\n", devname ? devname : "<null>");
2132     if (!devname) {
2133         /* return known MSDOS devices */
2134         strcpy(buffer,"CON COM1 COM2 LPT1 NUL ");
2135         while ((s=strchr(buffer,' ')))
2136                 *s='\0';
2137
2138         lstrcpynA(target,buffer,bufsize);
2139         return strlen(buffer);
2140     }
2141     strcpy(buffer,"\\DEV\\");
2142     strcat(buffer,devname);
2143     if ((s=strchr(buffer,':'))) *s='\0';
2144     lstrcpynA(target,buffer,bufsize);
2145     return strlen(buffer);
2146 }
2147
2148
2149 /***********************************************************************
2150  *           QueryDosDeviceW   (KERNEL32.414)
2151  *
2152  * returns array of strings terminated by \0, terminated by \0
2153  */
2154 DWORD WINAPI QueryDosDeviceW(LPCWSTR devname,LPWSTR target,DWORD bufsize)
2155 {
2156     LPSTR devnameA = devname?HEAP_strdupWtoA(GetProcessHeap(),0,devname):NULL;
2157     LPSTR targetA = (LPSTR)HeapAlloc(GetProcessHeap(),0,bufsize);
2158     DWORD ret = QueryDosDeviceA(devnameA,targetA,bufsize);
2159
2160     lstrcpynAtoW(target,targetA,bufsize);
2161     if (devnameA) HeapFree(GetProcessHeap(),0,devnameA);
2162     if (targetA) HeapFree(GetProcessHeap(),0,targetA);
2163     return ret;
2164 }
2165
2166
2167 /***********************************************************************
2168  *           SystemTimeToFileTime   (KERNEL32.526)
2169  */
2170 BOOL WINAPI SystemTimeToFileTime( const SYSTEMTIME *syst, LPFILETIME ft )
2171 {
2172 #ifdef HAVE_TIMEGM
2173     struct tm xtm;
2174     time_t utctime;
2175 #else
2176     struct tm xtm,*local_tm,*utc_tm;
2177     time_t localtim,utctime;
2178 #endif
2179
2180     xtm.tm_year = syst->wYear-1900;
2181     xtm.tm_mon  = syst->wMonth - 1;
2182     xtm.tm_wday = syst->wDayOfWeek;
2183     xtm.tm_mday = syst->wDay;
2184     xtm.tm_hour = syst->wHour;
2185     xtm.tm_min  = syst->wMinute;
2186     xtm.tm_sec  = syst->wSecond; /* this is UTC */
2187     xtm.tm_isdst = -1;
2188 #ifdef HAVE_TIMEGM
2189     utctime = timegm(&xtm);
2190     DOSFS_UnixTimeToFileTime( utctime, ft,
2191                               syst->wMilliseconds * 10000 );
2192 #else
2193     localtim = mktime(&xtm);    /* now we've got local time */
2194     local_tm = localtime(&localtim);
2195     utc_tm = gmtime(&localtim);
2196     utctime = mktime(utc_tm);
2197     DOSFS_UnixTimeToFileTime( 2*localtim -utctime, ft,
2198                               syst->wMilliseconds * 10000 );
2199 #endif
2200     return TRUE;
2201 }
2202
2203 /***********************************************************************
2204  *           DefineDosDeviceA       (KERNEL32.182)
2205  */
2206 BOOL WINAPI DefineDosDeviceA(DWORD flags,LPCSTR devname,LPCSTR targetpath) {
2207         FIXME("(0x%08lx,%s,%s),stub!\n",flags,devname,targetpath);
2208         SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
2209         return FALSE;
2210 }
2211
2212 /*
2213    --- 16 bit functions ---
2214 */
2215
2216 /*************************************************************************
2217  *           FindFirstFile16   (KERNEL.413)
2218  */
2219 HANDLE16 WINAPI FindFirstFile16( LPCSTR path, WIN32_FIND_DATAA *data )
2220 {
2221     DOS_FULL_NAME full_name;
2222     HGLOBAL16 handle;
2223     FIND_FIRST_INFO *info;
2224
2225     data->dwReserved0 = data->dwReserved1 = 0x0;
2226     if (!path) return 0;
2227     if (!DOSFS_GetFullName( path, FALSE, &full_name ))
2228         return INVALID_HANDLE_VALUE16;
2229     if (!(handle = GlobalAlloc16( GMEM_MOVEABLE, sizeof(FIND_FIRST_INFO) )))
2230         return INVALID_HANDLE_VALUE16;
2231     info = (FIND_FIRST_INFO *)GlobalLock16( handle );
2232     info->path = HEAP_strdupA( SystemHeap, 0, full_name.long_name );
2233     info->long_mask = strrchr( info->path, '/' );
2234     if (info->long_mask )
2235         *(info->long_mask++) = '\0';
2236     info->short_mask = NULL;
2237     info->attr = 0xff;
2238     if (path[0] && (path[1] == ':')) info->drive = toupper(*path) - 'A';
2239     else info->drive = DRIVE_GetCurrentDrive();
2240     info->cur_pos = 0;
2241
2242     info->dir = DOSFS_OpenDir( info->path );
2243
2244     GlobalUnlock16( handle );
2245     if (!FindNextFile16( handle, data ))
2246     {
2247         FindClose16( handle );
2248         SetLastError( ERROR_NO_MORE_FILES );
2249         return INVALID_HANDLE_VALUE16;
2250     }
2251     return handle;
2252 }
2253
2254 /*************************************************************************
2255  *           FindNextFile16   (KERNEL.414)
2256  */
2257 BOOL16 WINAPI FindNextFile16( HANDLE16 handle, WIN32_FIND_DATAA *data )
2258 {
2259     FIND_FIRST_INFO *info;
2260
2261     if ((handle == INVALID_HANDLE_VALUE16) ||
2262        !(info = (FIND_FIRST_INFO *)GlobalLock16( handle )))
2263     {
2264         SetLastError( ERROR_INVALID_HANDLE );
2265         return FALSE;
2266     }
2267     GlobalUnlock16( handle );
2268     if (!info->path || !info->dir)
2269     {
2270         SetLastError( ERROR_NO_MORE_FILES );
2271         return FALSE;
2272     }
2273     if (!DOSFS_FindNextEx( info, data ))
2274     {
2275         DOSFS_CloseDir( info->dir ); info->dir = NULL;
2276         HeapFree( SystemHeap, 0, info->path );
2277         info->path = info->long_mask = NULL;
2278         SetLastError( ERROR_NO_MORE_FILES );
2279         return FALSE;
2280     }
2281     return TRUE;
2282 }
2283
2284 /*************************************************************************
2285  *           FindClose16   (KERNEL.415)
2286  */
2287 BOOL16 WINAPI FindClose16( HANDLE16 handle )
2288 {
2289     FIND_FIRST_INFO *info;
2290
2291     if ((handle == INVALID_HANDLE_VALUE16) ||
2292         !(info = (FIND_FIRST_INFO *)GlobalLock16( handle )))
2293     {
2294         SetLastError( ERROR_INVALID_HANDLE );
2295         return FALSE;
2296     }
2297     if (info->dir) DOSFS_CloseDir( info->dir );
2298     if (info->path) HeapFree( SystemHeap, 0, info->path );
2299     GlobalUnlock16( handle );
2300     GlobalFree16( handle );
2301     return TRUE;
2302 }
2303