jim-file.c

   1 /*
   2  * Implements the file command for jim
   3  *
   4  * (c) 2008 Steve Bennett <steveb@workware.net.au>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above
  13  *    copyright notice, this list of conditions and the following
  14  *    disclaimer in the documentation and/or other materials
  15  *    provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  19  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  21  * JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  28  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and documentation
  31  * are those of the authors and should not be interpreted as representing
  32  * official policies, either expressed or implied, of the Jim Tcl Project.
  33  *
  34  * Based on code originally from Tcl 6.7:
  35  *
  36  * Copyright 1987-1991 Regents of the University of California
  37  * Permission to use, copy, modify, and distribute this
  38  * software and its documentation for any purpose and without
  39  * fee is hereby granted, provided that the above copyright
  40  * notice appear in all copies.  The University of California
  41  * makes no representations about the suitability of this
  42  * software for any purpose.  It is provided "as is" without
  43  * express or implied warranty.
  44  */
  45
  46 #include <limits.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <stdio.h>
  50 #include <errno.h>
  51 #include <sys/stat.h>
  52
  53 #include <jimautoconf.h>
  54 #include <jim-subcmd.h>
  55
  56 #ifdef HAVE_UTIMES
  57 #include <sys/time.h>
  58 #endif
  59 #ifdef HAVE_UNISTD_H
  60 #include <unistd.h>
  61 #elif defined(_MSC_VER)
  62 #include <direct.h>
  63 #define F_OK 0
  64 #define W_OK 2
  65 #define R_OK 4
  66 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
  67 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  68 #endif
  69
  70 # ifndef MAXPATHLEN
  71 # define MAXPATHLEN JIM_PATH_LEN
  72 # endif
  73
  74 /*
  75  *----------------------------------------------------------------------
  76  *
  77  * JimGetFileType --
  78  *
  79  *  Given a mode word, returns a string identifying the type of a
  80  *  file.
  81  *
  82  * Results:
  83  *  A static text string giving the file type from mode.
  84  *
  85  * Side effects:
  86  *  None.
  87  *
  88  *----------------------------------------------------------------------
  89  */
  90
  91 static const char *JimGetFileType(int mode)
  92 {
  93     if (S_ISREG(mode)) {
  94         return "file";
  95     }
  96     else if (S_ISDIR(mode)) {
  97         return "directory";
  98     }
  99 #ifdef S_ISCHR
 100     else if (S_ISCHR(mode)) {
 101         return "characterSpecial";
 102     }
 103 #endif
 104 #ifdef S_ISBLK
 105     else if (S_ISBLK(mode)) {
 106         return "blockSpecial";
 107     }
 108 #endif
 109 #ifdef S_ISFIFO
 110     else if (S_ISFIFO(mode)) {
 111         return "fifo";
 112     }
 113 #endif
 114 #ifdef S_ISLNK
 115     else if (S_ISLNK(mode)) {
 116         return "link";
 117     }
 118 #endif
 119 #ifdef S_ISSOCK
 120     else if (S_ISSOCK(mode)) {
 121         return "socket";
 122     }
 123 #endif
 124     return "unknown";
 125 }
 126
 127 /*
 128  *----------------------------------------------------------------------
 129  *
 130  * StoreStatData --
 131  *
 132  *  This is a utility procedure that breaks out the fields of a
 133  *  "stat" structure and stores them in textual form into the
 134  *  elements of an associative array.
 135  *
 136  * Results:
 137  *  Returns a standard Tcl return value.  If an error occurs then
 138  *  a message is left in interp->result.
 139  *
 140  * Side effects:
 141  *  Elements of the associative array given by "varName" are modified.
 142  *
 143  *----------------------------------------------------------------------
 144  */
 145 static void AppendStatElement(Jim_Interp *interp, Jim_Obj *listObj, const char *key, int value)
 146 {
 147     Jim_ListAppendElement(interp, listObj, Jim_NewStringObj(interp, key, -1));
 148     Jim_ListAppendElement(interp, listObj, Jim_NewIntObj(interp, value));
 149 }
 150
 151 static int StoreStatData(Jim_Interp *interp, Jim_Obj *varName, const struct stat *sb)
 152 {
 153     /* Just use a list to store the data */
 154     Jim_Obj *listObj = Jim_NewListObj(interp, NULL, 0);
 155
 156     AppendStatElement(interp, listObj, "dev", sb->st_dev);
 157     AppendStatElement(interp, listObj, "ino", sb->st_ino);
 158     AppendStatElement(interp, listObj, "mode", sb->st_mode);
 159     AppendStatElement(interp, listObj, "nlink", sb->st_nlink);
 160     AppendStatElement(interp, listObj, "uid", sb->st_uid);
 161     AppendStatElement(interp, listObj, "gid", sb->st_gid);
 162     AppendStatElement(interp, listObj, "size", sb->st_size);
 163     AppendStatElement(interp, listObj, "atime", sb->st_atime);
 164     AppendStatElement(interp, listObj, "mtime", sb->st_mtime);
 165     AppendStatElement(interp, listObj, "ctime", sb->st_ctime);
 166     Jim_ListAppendElement(interp, listObj, Jim_NewStringObj(interp, "type", -1));
 167     Jim_ListAppendElement(interp, listObj, Jim_NewStringObj(interp, JimGetFileType((int)sb->st_mode), -1));
 168
 169     /* Was a variable specified? */
 170     if (varName) {
 171         Jim_Obj *objPtr = Jim_GetVariable(interp, varName, JIM_NONE);
 172         if (objPtr) {
 173             if (Jim_DictSize(interp, objPtr) < 0) {
 174                 /* This message matches the one from Tcl */
 175                 Jim_SetResultFormatted(interp, "can't set \"%#s(dev)\": variable isn't array", varName);
 176                 Jim_FreeNewObj(interp, listObj);
 177                 return JIM_ERR;
 178             }
 179
 180             if (Jim_IsShared(objPtr))
 181                 objPtr = Jim_DuplicateObj(interp, objPtr);
 182
 183             /* Just cheat here and append as a list and convert to a dict */
 184             Jim_ListAppendList(interp, objPtr, listObj);
 185             Jim_DictSize(interp, objPtr);
 186             Jim_InvalidateStringRep(objPtr);
 187
 188             Jim_FreeNewObj(interp, listObj);
 189             listObj = objPtr;
 190         }
 191         Jim_SetVariable(interp, varName, listObj);
 192     }
 193
 194     /* And also return the value */
 195     Jim_SetResult(interp, listObj);
 196
 197     return JIM_OK;
 198 }
 199
 200 static int file_cmd_dirname(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 201 {
 202     const char *path = Jim_String(argv[0]);
 203     const char *p = strrchr(path, '/');
 204
 205     if (!p && path[0] == '.' && path[1] == '.' && path[2] == '\0') {
 206         Jim_SetResultString(interp, "..", -1);
 207     } else if (!p) {
 208         Jim_SetResultString(interp, ".", -1);
 209     }
 210     else if (p == path) {
 211         Jim_SetResultString(interp, "/", -1);
 212     }
 213 #if defined(__MINGW32__) || defined(_MSC_VER)
 214     else if (p[-1] == ':') {
 215         /* z:/dir => z:/ */
 216         Jim_SetResultString(interp, path, p - path + 1);
 217     }
 218 #endif
 219     else {
 220         Jim_SetResultString(interp, path, p - path);
 221     }
 222     return JIM_OK;
 223 }
 224
 225 static int file_cmd_rootname(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 226 {
 227     const char *path = Jim_String(argv[0]);
 228     const char *lastSlash = strrchr(path, '/');
 229     const char *p = strrchr(path, '.');
 230
 231     if (p == NULL || (lastSlash != NULL && lastSlash > p)) {
 232         Jim_SetResult(interp, argv[0]);
 233     }
 234     else {
 235         Jim_SetResultString(interp, path, p - path);
 236     }
 237     return JIM_OK;
 238 }
 239
 240 static int file_cmd_extension(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 241 {
 242     const char *path = Jim_String(argv[0]);
 243     const char *lastSlash = strrchr(path, '/');
 244     const char *p = strrchr(path, '.');
 245
 246     if (p == NULL || (lastSlash != NULL && lastSlash >= p)) {
 247         p = "";
 248     }
 249     Jim_SetResultString(interp, p, -1);
 250     return JIM_OK;
 251 }
 252
 253 static int file_cmd_tail(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 254 {
 255     const char *path = Jim_String(argv[0]);
 256     const char *lastSlash = strrchr(path, '/');
 257
 258     if (lastSlash) {
 259         Jim_SetResultString(interp, lastSlash + 1, -1);
 260     }
 261     else {
 262         Jim_SetResult(interp, argv[0]);
 263     }
 264     return JIM_OK;
 265 }
 266
 267 static int file_cmd_normalize(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 268 {
 269 #ifdef HAVE_REALPATH
 270     const char *path = Jim_String(argv[0]);
 271     char *newname = Jim_Alloc(MAXPATHLEN + 1);
 272
 273     if (realpath(path, newname)) {
 274         Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, newname, -1));
 275         return JIM_OK;
 276     }
 277     else {
 278         Jim_Free(newname);
 279         Jim_SetResultFormatted(interp, "can't normalize \"%#s\": %s", argv[0], strerror(errno));
 280         return JIM_ERR;
 281     }
 282 #else
 283     Jim_SetResultString(interp, "Not implemented", -1);
 284     return JIM_ERR;
 285 #endif
 286 }
 287
 288 static int file_cmd_join(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 289 {
 290     int i;
 291     char *newname = Jim_Alloc(MAXPATHLEN + 1);
 292     char *last = newname;
 293
 294     *newname = 0;
 295
 296     /* Simple implementation for now */
 297     for (i = 0; i < argc; i++) {
 298         int len;
 299         const char *part = Jim_GetString(argv[i], &len);
 300
 301         if (*part == '/') {
 302             /* Absolute component, so go back to the start */
 303             last = newname;
 304         }
 305 #if defined(__MINGW32__) || defined(_MSC_VER)
 306         else if (strchr(part, ':')) {
 307             /* Absolute compontent on mingw, so go back to the start */
 308             last = newname;
 309         }
 310 #endif
 311         else if (part[0] == '.') {
 312             if (part[1] == '/') {
 313                 part += 2;
 314                 len -= 2;
 315             }
 316             else if (part[1] == 0 && last != newname) {
 317                 /* Adding '.' to an existing path does nothing */
 318                 continue;
 319             }
 320         }
 321
 322         /* Add a slash if needed */
 323         if (last != newname && last[-1] != '/') {
 324             *last++ = '/';
 325         }
 326
 327         if (len) {
 328             if (last + len - newname >= MAXPATHLEN) {
 329                 Jim_Free(newname);
 330                 Jim_SetResultString(interp, "Path too long", -1);
 331                 return JIM_ERR;
 332             }
 333             memcpy(last, part, len);
 334             last += len;
 335         }
 336
 337         /* Remove a slash if needed */
 338         if (last > newname + 1 && last[-1] == '/') {
 339             *--last = 0;
 340         }
 341     }
 342
 343     *last = 0;
 344
 345     /* Probably need to handle some special cases ... */
 346
 347     Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, newname, last - newname));
 348
 349     return JIM_OK;
 350 }
 351
 352 static int file_access(Jim_Interp *interp, Jim_Obj *filename, int mode)
 353 {
 354     const char *path = Jim_String(filename);
 355     int rc = access(path, mode);
 356
 357     Jim_SetResultBool(interp, rc != -1);
 358
 359     return JIM_OK;
 360 }
 361
 362 static int file_cmd_readable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 363 {
 364     return file_access(interp, argv[0], R_OK);
 365 }
 366
 367 static int file_cmd_writable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 368 {
 369     return file_access(interp, argv[0], W_OK);
 370 }
 371
 372 static int file_cmd_executable(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 373 {
 374 #ifdef X_OK
 375     return file_access(interp, argv[0], X_OK);
 376 #else
 377     /* XXX: X_OK doesn't work under Windows.
 378      * In any case, may need to add .exe, etc. so just lie!
 379      */
 380     Jim_SetResultBool(interp, 1);
 381     return JIM_OK;
 382 #endif
 383 }
 384
 385 static int file_cmd_exists(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 386 {
 387     return file_access(interp, argv[0], F_OK);
 388 }
 389
 390 static int file_cmd_delete(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 391 {
 392     int force = Jim_CompareStringImmediate(interp, argv[0], "-force");
 393
 394     if (force || Jim_CompareStringImmediate(interp, argv[0], "--")) {
 395         argc++;
 396         argv--;
 397     }
 398
 399     while (argc--) {
 400         const char *path = Jim_String(argv[0]);
 401
 402         if (unlink(path) == -1 && errno != ENOENT) {
 403             if (rmdir(path) == -1) {
 404                 /* Maybe try using the script helper */
 405                 if (!force || Jim_EvalPrefix(interp, "file delete force", 1, argv) != JIM_OK) {
 406                     Jim_SetResultFormatted(interp, "couldn't delete file \"%s\": %s", path,
 407                         strerror(errno));
 408                     return JIM_ERR;
 409                 }
 410             }
 411         }
 412         argv++;
 413     }
 414     return JIM_OK;
 415 }
 416
 417 #ifdef HAVE_MKDIR_ONE_ARG
 418 #define MKDIR_DEFAULT(PATHNAME) mkdir(PATHNAME)
 419 #else
 420 #define MKDIR_DEFAULT(PATHNAME) mkdir(PATHNAME, 0755)
 421 #endif
 422
 423 /**
 424  * Create directory, creating all intermediate paths if necessary.
 425  *
 426  * Returns 0 if OK or -1 on failure (and sets errno)
 427  *
 428  * Note: The path may be modified.
 429  */
 430 static int mkdir_all(char *path)
 431 {
 432     int ok = 1;
 433
 434     /* First time just try to make the dir */
 435     goto first;
 436
 437     while (ok--) {
 438         /* Must have failed the first time, so recursively make the parent and try again */
 439         {
 440             char *slash = strrchr(path, '/');
 441
 442             if (slash && slash != path) {
 443                 *slash = 0;
 444                 if (mkdir_all(path) != 0) {
 445                     return -1;
 446                 }
 447                 *slash = '/';
 448             }
 449         }
 450       first:
 451         if (MKDIR_DEFAULT(path) == 0) {
 452             return 0;
 453         }
 454         if (errno == ENOENT) {
 455             /* Create the parent and try again */
 456             continue;
 457         }
 458         /* Maybe it already exists as a directory */
 459         if (errno == EEXIST) {
 460             struct stat sb;
 461
 462             if (stat(path, &sb) == 0 && S_ISDIR(sb.st_mode)) {
 463                 return 0;
 464             }
 465             /* Restore errno */
 466             errno = EEXIST;
 467         }
 468         /* Failed */
 469         break;
 470     }
 471     return -1;
 472 }
 473
 474 static int file_cmd_mkdir(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 475 {
 476     while (argc--) {
 477         char *path = Jim_StrDup(Jim_String(argv[0]));
 478         int rc = mkdir_all(path);
 479
 480         Jim_Free(path);
 481         if (rc != 0) {
 482             Jim_SetResultFormatted(interp, "can't create directory \"%#s\": %s", argv[0],
 483                 strerror(errno));
 484             return JIM_ERR;
 485         }
 486         argv++;
 487     }
 488     return JIM_OK;
 489 }
 490
 491 #ifdef HAVE_MKSTEMP
 492 static int file_cmd_tempfile(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 493 {
 494     int fd;
 495     char *filename;
 496     const char *template = "/tmp/tcl.tmp.XXXXXX";
 497
 498     if (argc >= 1) {
 499         template = Jim_String(argv[0]);
 500     }
 501     filename = Jim_StrDup(template);
 502
 503     fd = mkstemp(filename);
 504     if (fd < 0) {
 505         Jim_SetResultString(interp, "Failed to create tempfile", -1);
 506         return JIM_ERR;
 507     }
 508     close(fd);
 509
 510     Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, filename, -1));
 511     return JIM_OK;
 512 }
 513 #endif
 514
 515 static int file_cmd_rename(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 516 {
 517     const char *source;
 518     const char *dest;
 519     int force = 0;
 520
 521     if (argc == 3) {
 522         if (!Jim_CompareStringImmediate(interp, argv[0], "-force")) {
 523             return -1;
 524         }
 525         force++;
 526         argv++;
 527         argc--;
 528     }
 529
 530     source = Jim_String(argv[0]);
 531     dest = Jim_String(argv[1]);
 532
 533     if (!force && access(dest, F_OK) == 0) {
 534         Jim_SetResultFormatted(interp, "error renaming \"%#s\" to \"%#s\": target exists", argv[0],
 535             argv[1]);
 536         return JIM_ERR;
 537     }
 538
 539     if (rename(source, dest) != 0) {
 540         Jim_SetResultFormatted(interp, "error renaming \"%#s\" to \"%#s\": %s", argv[0], argv[1],
 541             strerror(errno));
 542         return JIM_ERR;
 543     }
 544
 545     return JIM_OK;
 546 }
 547
 548 static int file_stat(Jim_Interp *interp, Jim_Obj *filename, struct stat *sb)
 549 {
 550     const char *path = Jim_String(filename);
 551
 552     if (stat(path, sb) == -1) {
 553         Jim_SetResultFormatted(interp, "could not read \"%#s\": %s", filename, strerror(errno));
 554         return JIM_ERR;
 555     }
 556     return JIM_OK;
 557 }
 558
 559 #ifdef HAVE_LSTAT
 560 static int file_lstat(Jim_Interp *interp, Jim_Obj *filename, struct stat *sb)
 561 {
 562     const char *path = Jim_String(filename);
 563
 564     if (lstat(path, sb) == -1) {
 565         Jim_SetResultFormatted(interp, "could not read \"%#s\": %s", filename, strerror(errno));
 566         return JIM_ERR;
 567     }
 568     return JIM_OK;
 569 }
 570 #else
 571 #define file_lstat file_stat
 572 #endif
 573
 574 static int file_cmd_atime(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 575 {
 576     struct stat sb;
 577
 578     if (file_stat(interp, argv[0], &sb) != JIM_OK) {
 579         return JIM_ERR;
 580     }
 581     Jim_SetResultInt(interp, sb.st_atime);
 582     return JIM_OK;
 583 }
 584
 585 static int file_cmd_mtime(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 586 {
 587     struct stat sb;
 588
 589     if (argc == 2) {
 590 #ifdef HAVE_UTIMES
 591         jim_wide newtime;
 592         struct timeval times[2];
 593
 594         if (Jim_GetWide(interp, argv[1], &newtime) != JIM_OK) {
 595             return JIM_ERR;
 596         }
 597
 598         times[1].tv_sec = times[0].tv_sec = newtime;
 599         times[1].tv_usec = times[0].tv_usec = 0;
 600
 601         if (utimes(Jim_String(argv[0]), times) != 0) {
 602             Jim_SetResultFormatted(interp, "can't set time on \"%#s\": %s", argv[0], strerror(errno));
 603             return JIM_ERR;
 604         }
 605 #else
 606         Jim_SetResultString(interp, "Not implemented", -1);
 607         return JIM_ERR;
 608 #endif
 609     }
 610     if (file_stat(interp, argv[0], &sb) != JIM_OK) {
 611         return JIM_ERR;
 612     }
 613     Jim_SetResultInt(interp, sb.st_mtime);
 614     return JIM_OK;
 615 }
 616
 617 static int file_cmd_copy(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 618 {
 619     return Jim_EvalPrefix(interp, "file copy", argc, argv);
 620 }
 621
 622 static int file_cmd_size(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 623 {
 624     struct stat sb;
 625
 626     if (file_stat(interp, argv[0], &sb) != JIM_OK) {
 627         return JIM_ERR;
 628     }
 629     Jim_SetResultInt(interp, sb.st_size);
 630     return JIM_OK;
 631 }
 632
 633 static int file_cmd_isdirectory(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 634 {
 635     struct stat sb;
 636     int ret = 0;
 637
 638     if (file_stat(interp, argv[0], &sb) == JIM_OK) {
 639         ret = S_ISDIR(sb.st_mode);
 640     }
 641     Jim_SetResultInt(interp, ret);
 642     return JIM_OK;
 643 }
 644
 645 static int file_cmd_isfile(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 646 {
 647     struct stat sb;
 648     int ret = 0;
 649
 650     if (file_stat(interp, argv[0], &sb) == JIM_OK) {
 651         ret = S_ISREG(sb.st_mode);
 652     }
 653     Jim_SetResultInt(interp, ret);
 654     return JIM_OK;
 655 }
 656
 657 #ifdef HAVE_GETEUID
 658 static int file_cmd_owned(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 659 {
 660     struct stat sb;
 661     int ret = 0;
 662
 663     if (file_stat(interp, argv[0], &sb) == JIM_OK) {
 664         ret = (geteuid() == sb.st_uid);
 665     }
 666     Jim_SetResultInt(interp, ret);
 667     return JIM_OK;
 668 }
 669 #endif
 670
 671 #if defined(HAVE_READLINK)
 672 static int file_cmd_readlink(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 673 {
 674     const char *path = Jim_String(argv[0]);
 675     char *linkValue = Jim_Alloc(MAXPATHLEN + 1);
 676
 677     int linkLength = readlink(path, linkValue, MAXPATHLEN);
 678
 679     if (linkLength == -1) {
 680         Jim_Free(linkValue);
 681         Jim_SetResultFormatted(interp, "couldn't readlink \"%#s\": %s", argv[0], strerror(errno));
 682         return JIM_ERR;
 683     }
 684     linkValue[linkLength] = 0;
 685     Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, linkValue, linkLength));
 686     return JIM_OK;
 687 }
 688 #endif
 689
 690 static int file_cmd_type(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 691 {
 692     struct stat sb;
 693
 694     if (file_lstat(interp, argv[0], &sb) != JIM_OK) {
 695         return JIM_ERR;
 696     }
 697     Jim_SetResultString(interp, JimGetFileType((int)sb.st_mode), -1);
 698     return JIM_OK;
 699 }
 700
 701 #ifdef HAVE_LSTAT
 702 static int file_cmd_lstat(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 703 {
 704     struct stat sb;
 705
 706     if (file_lstat(interp, argv[0], &sb) != JIM_OK) {
 707         return JIM_ERR;
 708     }
 709     return StoreStatData(interp, argc == 2 ? argv[1] : NULL, &sb);
 710 }
 711 #else
 712 #define file_cmd_lstat file_cmd_stat
 713 #endif
 714
 715 static int file_cmd_stat(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 716 {
 717     struct stat sb;
 718
 719     if (file_stat(interp, argv[0], &sb) != JIM_OK) {
 720         return JIM_ERR;
 721     }
 722     return StoreStatData(interp, argc == 2 ? argv[1] : NULL, &sb);
 723 }
 724
 725 static const jim_subcmd_type file_command_table[] = {
 726     {   "atime",
 727         "name",
 728         file_cmd_atime,
 729         1,
 730         1,
 731         /* Description: Last access time */
 732     },
 733     {   "mtime",
 734         "name ?time?",
 735         file_cmd_mtime,
 736         1,
 737         2,
 738         /* Description: Get or set last modification time */
 739     },
 740     {   "copy",
 741         "?-force? source dest",
 742         file_cmd_copy,
 743         2,
 744         3,
 745         /* Description: Copy source file to destination file */
 746     },
 747     {   "dirname",
 748         "name",
 749         file_cmd_dirname,
 750         1,
 751         1,
 752         /* Description: Directory part of the name */
 753     },
 754     {   "rootname",
 755         "name",
 756         file_cmd_rootname,
 757         1,
 758         1,
 759         /* Description: Name without any extension */
 760     },
 761     {   "extension",
 762         "name",
 763         file_cmd_extension,
 764         1,
 765         1,
 766         /* Description: Last extension including the dot */
 767     },
 768     {   "tail",
 769         "name",
 770         file_cmd_tail,
 771         1,
 772         1,
 773         /* Description: Last component of the name */
 774     },
 775     {   "normalize",
 776         "name",
 777         file_cmd_normalize,
 778         1,
 779         1,
 780         /* Description: Normalized path of name */
 781     },
 782     {   "join",
 783         "name ?name ...?",
 784         file_cmd_join,
 785         1,
 786         -1,
 787         /* Description: Join multiple path components */
 788     },
 789     {   "readable",
 790         "name",
 791         file_cmd_readable,
 792         1,
 793         1,
 794         /* Description: Is file readable */
 795     },
 796     {   "writable",
 797         "name",
 798         file_cmd_writable,
 799         1,
 800         1,
 801         /* Description: Is file writable */
 802     },
 803     {   "executable",
 804         "name",
 805         file_cmd_executable,
 806         1,
 807         1,
 808         /* Description: Is file executable */
 809     },
 810     {   "exists",
 811         "name",
 812         file_cmd_exists,
 813         1,
 814         1,
 815         /* Description: Does file exist */
 816     },
 817     {   "delete",
 818         "?-force|--? name ...",
 819         file_cmd_delete,
 820         1,
 821         -1,
 822         /* Description: Deletes the files or directories (must be empty unless -force) */
 823     },
 824     {   "mkdir",
 825         "dir ...",
 826         file_cmd_mkdir,
 827         1,
 828         -1,
 829         /* Description: Creates the directories */
 830     },
 831 #ifdef HAVE_MKSTEMP
 832     {   "tempfile",
 833         "?template?",
 834         file_cmd_tempfile,
 835         0,
 836         1,
 837         /* Description: Creates a temporary filename */
 838     },
 839 #endif
 840     {   "rename",
 841         "?-force? source dest",
 842         file_cmd_rename,
 843         2,
 844         3,
 845         /* Description: Renames a file */
 846     },
 847 #if defined(HAVE_READLINK)
 848     {   "readlink",
 849         "name",
 850         file_cmd_readlink,
 851         1,
 852         1,
 853         /* Description: Value of the symbolic link */
 854     },
 855 #endif
 856     {   "size",
 857         "name",
 858         file_cmd_size,
 859         1,
 860         1,
 861         /* Description: Size of file */
 862     },
 863     {   "stat",
 864         "name ?var?",
 865         file_cmd_stat,
 866         1,
 867         2,
 868         /* Description: Returns results of stat, and may store in var array */
 869     },
 870     {   "lstat",
 871         "name ?var?",
 872         file_cmd_lstat,
 873         1,
 874         2,
 875         /* Description: Returns results of lstat, and may store in var array */
 876     },
 877     {   "type",
 878         "name",
 879         file_cmd_type,
 880         1,
 881         1,
 882         /* Description: Returns type of the file */
 883     },
 884 #ifdef HAVE_GETEUID
 885     {   "owned",
 886         "name",
 887         file_cmd_owned,
 888         1,
 889         1,
 890         /* Description: Returns 1 if owned by the current owner */
 891     },
 892 #endif
 893     {   "isdirectory",
 894         "name",
 895         file_cmd_isdirectory,
 896         1,
 897         1,
 898         /* Description: Returns 1 if name is a directory */
 899     },
 900     {   "isfile",
 901         "name",
 902         file_cmd_isfile,
 903         1,
 904         1,
 905         /* Description: Returns 1 if name is a file */
 906     },
 907     {
 908         NULL
 909     }
 910 };
 911
 912 static int Jim_CdCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 913 {
 914     const char *path;
 915
 916     if (argc != 2) {
 917         Jim_WrongNumArgs(interp, 1, argv, "dirname");
 918         return JIM_ERR;
 919     }
 920
 921     path = Jim_String(argv[1]);
 922
 923     if (chdir(path) != 0) {
 924         Jim_SetResultFormatted(interp, "couldn't change working directory to \"%s\": %s", path,
 925             strerror(errno));
 926         return JIM_ERR;
 927     }
 928     return JIM_OK;
 929 }
 930
 931 static int Jim_PwdCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 932 {
 933     const int cwd_len = 2048;
 934     char *cwd = malloc(cwd_len);
 935
 936     if (getcwd(cwd, cwd_len) == NULL) {
 937         Jim_SetResultString(interp, "Failed to get pwd", -1);
 938         return JIM_ERR;
 939     }
 940 #if defined(__MINGW32__) || defined(_MSC_VER)
 941     {
 942         /* Try to keep backlashes out of paths */
 943         char *p = cwd;
 944         while ((p = strchr(p, '\\')) != NULL) {
 945             *p++ = '/';
 946         }
 947     }
 948 #endif
 949
 950     Jim_SetResultString(interp, cwd, -1);
 951
 952     free(cwd);
 953     return JIM_OK;
 954 }
 955
 956 int Jim_fileInit(Jim_Interp *interp)
 957 {
 958     if (Jim_PackageProvide(interp, "file", "1.0", JIM_ERRMSG))
 959         return JIM_ERR;
 960
 961     Jim_CreateCommand(interp, "file", Jim_SubCmdProc, (void *)file_command_table, NULL);
 962     Jim_CreateCommand(interp, "pwd", Jim_PwdCmd, NULL, NULL);
 963     Jim_CreateCommand(interp, "cd", Jim_CdCmd, NULL, NULL);
 964     return JIM_OK;
 965 }