posix/tst-dir.c

   1 /* Copyright (C) 2000-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <dirent.h>
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <mcheck.h>
  22 #include <stddef.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/stat.h>
  28 #include <libc-diag.h>
  29
  30 /* We expect four arguments:
  31    - source directory name
  32    - object directory
  33    - common object directory
  34    - the program name with path
  35 */
  36 int
  37 main (int argc, char *argv[])
  38 {
  39   const char *srcdir;
  40   const char *objdir;
  41   const char *common_objdir;
  42   const char *progpath;
  43   struct stat64 st1;
  44   struct stat64 st2;
  45   struct stat64 st3;
  46   DIR *dir1;
  47   DIR *dir2;
  48   int result = 0;
  49   struct dirent64 *d;
  50   union
  51     {
  52       struct dirent64 d;
  53       char room [offsetof (struct dirent64, d_name[0]) + NAME_MAX + 1];
  54     }
  55     direntbuf;
  56   char *objdir_copy1;
  57   char *objdir_copy2;
  58   char *buf;
  59   int fd;
  60
  61   mtrace ();
  62
  63   if (argc < 5)
  64     {
  65       puts ("not enough parameters");
  66       exit (1);
  67     }
  68
  69   /* Make parameters available with nicer names.  */
  70   srcdir = argv[1];
  71   objdir = argv[2];
  72   common_objdir = argv[3];
  73   progpath = argv[4];
  74
  75   /* First test the current source dir.  We cannot really compare the
  76      result of `getpwd' with the srcdir string but we have other means.  */
  77   if (stat64 (".", &st1) < 0)
  78     {
  79       printf ("cannot stat starting directory: %m\n");
  80       exit (1);
  81     }
  82
  83   if (chdir (srcdir) < 0)
  84     {
  85       printf ("cannot change to source directory: %m\n");
  86       exit (1);
  87     }
  88   if (stat64 (".", &st2) < 0)
  89     {
  90       printf ("cannot stat source directory: %m\n");
  91       exit (1);
  92     }
  93
  94   /* The two last stat64 calls better were for the same directory.  */
  95   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
  96     {
  97       printf ("stat of source directory failed: (%lld,%lld) vs (%lld,%lld)\n",
  98               (long long int) st1.st_dev, (long long int) st1.st_ino,
  99               (long long int) st2.st_dev, (long long int) st2.st_ino);
 100       exit (1);
 101     }
 102
 103   /* Change to the object directory.  */
 104   if (chdir (objdir) < 0)
 105     {
 106       printf ("cannot change to object directory: %m\n");
 107       exit (1);
 108     }
 109   if (stat64 (".", &st1) < 0)
 110     {
 111       printf ("cannot stat object directory: %m\n");
 112       exit (1);
 113     }
 114   /* Is this the same we get as with the full path?  */
 115   if (stat64 (objdir, &st2) < 0)
 116     {
 117       printf ("cannot stat object directory with full path: %m\n");
 118       exit (1);
 119     }
 120   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
 121     {
 122       printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
 123               (long long int) st1.st_dev, (long long int) st1.st_ino,
 124               (long long int) st2.st_dev, (long long int) st2.st_ino);
 125       exit (1);
 126     }
 127
 128   objdir_copy1 = getcwd (NULL, 0);
 129   if (objdir_copy1 == NULL)
 130     {
 131       printf ("cannot get current directory name for object directory: %m\n");
 132       result = 1;
 133     }
 134
 135   /* First test: this directory must include our program.  */
 136   if (stat64 (progpath, &st2) < 0)
 137     {
 138       printf ("cannot stat program: %m\n");
 139       exit (1);
 140     }
 141
 142   dir1 = opendir (".");
 143   if (dir1 == NULL)
 144     {
 145       printf ("cannot open object directory: %m\n");
 146       exit (1);
 147     }
 148
 149   while ((d = readdir64 (dir1)) != NULL)
 150     {
 151       if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG)
 152         continue;
 153
 154       if (d->d_ino == st2.st_ino)
 155         {
 156           /* Might be it.  Test the device.  We could use the st_dev
 157              element from st1 but what the heck, do more testing.  */
 158           if (stat64 (d->d_name, &st3) < 0)
 159             {
 160               printf ("cannot stat entry from readdir: %m\n");
 161               result = 1;
 162               d = NULL;
 163               break;
 164             }
 165
 166           if (st3.st_dev == st2.st_dev)
 167             break;
 168         }
 169     }
 170
 171   if (d == NULL)
 172     {
 173       puts ("haven't found program in object directory");
 174       result = 1;
 175     }
 176
 177   /* We leave dir1 open.  */
 178
 179   /* Stat using file descriptor.  */
 180   if (fstat64 (dirfd (dir1), &st2) < 0)
 181     {
 182       printf ("cannot fstat object directory: %m\n");
 183       result = 1;
 184     }
 185   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
 186     {
 187       printf ("fstat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
 188               (long long int) st1.st_dev, (long long int) st1.st_ino,
 189               (long long int) st2.st_dev, (long long int) st2.st_ino);
 190       exit (1);
 191     }
 192
 193   if (chdir ("..") < 0)
 194     {
 195       printf ("cannot go to common object directory with \"..\": %m\n");
 196       exit (1);
 197     }
 198
 199   if (stat64 (".", &st1) < 0)
 200     {
 201       printf ("cannot stat common object directory: %m\n");
 202       exit (1);
 203     }
 204   /* Is this the same we get as with the full path?  */
 205   if (stat64 (common_objdir, &st2) < 0)
 206     {
 207       printf ("cannot stat common object directory with full path: %m\n");
 208       exit (1);
 209     }
 210   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
 211     {
 212       printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
 213               (long long int) st1.st_dev, (long long int) st1.st_ino,
 214               (long long int) st2.st_dev, (long long int) st2.st_ino);
 215       exit (1);
 216     }
 217
 218   /* Stat using file descriptor.  */
 219   if (fstat64 (dirfd (dir1), &st2) < 0)
 220     {
 221       printf ("cannot fstat object directory: %m\n");
 222       result = 1;
 223     }
 224
 225   dir2 = opendir (common_objdir);
 226   if (dir2 == NULL)
 227     {
 228       printf ("cannot open common object directory: %m\n");
 229       exit (1);
 230     }
 231
 232   while ((d = readdir64 (dir2)) != NULL)
 233     {
 234       if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
 235         continue;
 236
 237       if (d->d_ino == st2.st_ino)
 238         {
 239           /* Might be it.  Test the device.  We could use the st_dev
 240              element from st1 but what the heck, do more testing.  */
 241           if (stat64 (d->d_name, &st3) < 0)
 242             {
 243               printf ("cannot stat entry from readdir: %m\n");
 244               result = 1;
 245               d = NULL;
 246               break;
 247             }
 248
 249           if (st3.st_dev == st2.st_dev)
 250             break;
 251         }
 252     }
 253
 254   /* This better should be the object directory again.  */
 255   if (fchdir (dirfd (dir1)) < 0)
 256     {
 257       printf ("cannot fchdir to object directory: %m\n");
 258       exit (1);
 259     }
 260
 261   objdir_copy2 = getcwd (NULL, 0);
 262   if (objdir_copy2 == NULL)
 263     {
 264       printf ("cannot get current directory name for object directory: %m\n");
 265       result = 1;
 266     }
 267   if (strcmp (objdir_copy1, objdir_copy2) != 0)
 268     {
 269       puts ("getcwd returned a different string the second time");
 270       result = 1;
 271     }
 272
 273   /* This better should be the common object directory again.  */
 274   if (fchdir (dirfd (dir2)) < 0)
 275     {
 276       printf ("cannot fchdir to common object directory: %m\n");
 277       exit (1);
 278     }
 279
 280   if (stat64 (".", &st2) < 0)
 281     {
 282       printf ("cannot stat common object directory: %m\n");
 283       exit (1);
 284     }
 285   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
 286     {
 287       printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
 288               (long long int) st1.st_dev, (long long int) st1.st_ino,
 289               (long long int) st2.st_dev, (long long int) st2.st_ino);
 290       exit (1);
 291     }
 292
 293   buf = (char *) malloc (strlen (objdir_copy1) + 1 + sizeof "tst-dir.XXXXXX");
 294   if (buf == NULL)
 295     {
 296       printf ("cannot allocate buffer: %m");
 297       exit (1);
 298     }
 299
 300   stpcpy (stpcpy (stpcpy (buf, objdir_copy1), "/"), "tst-dir.XXXXXX");
 301   if (mkdtemp (buf) == NULL)
 302     {
 303       printf ("cannot create test directory in object directory: %m\n");
 304       exit (1);
 305     }
 306   if (stat64 (buf, &st1) < 0)
 307     {
 308       printf ("cannot stat new directory \"%s\": %m\n", buf);
 309       exit (1);
 310     }
 311   if (chmod (buf, 0700) < 0)
 312     {
 313       printf ("cannot change mode of new directory: %m\n");
 314       exit (1);
 315     }
 316
 317   /* The test below covers the deprecated readdir64_r function.  */
 318   DIAG_PUSH_NEEDS_COMMENT;
 319   DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
 320
 321   /* Try to find the new directory.  */
 322   rewinddir (dir1);
 323   while (readdir64_r (dir1, &direntbuf.d, &d) == 0 && d != NULL)
 324     {
 325       if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
 326         continue;
 327
 328       if (d->d_ino == st1.st_ino)
 329         {
 330           /* Might be it.  Test the device.  We could use the st_dev
 331              element from st1 but what the heck, do more testing.  */
 332           size_t len = strlen (objdir) + 1 + _D_EXACT_NAMLEN (d) + 1;
 333           char tmpbuf[len];
 334
 335           stpcpy (stpcpy (stpcpy (tmpbuf, objdir), "/"), d->d_name);
 336
 337           if (stat64 (tmpbuf, &st3) < 0)
 338             {
 339               printf ("cannot stat entry from readdir: %m\n");
 340               result = 1;
 341               d = NULL;
 342               break;
 343             }
 344
 345           if (st3.st_dev == st2.st_dev
 346               && strcmp (d->d_name, buf + strlen (buf) - 14) == 0)
 347             break;
 348         }
 349     }
 350
 351   DIAG_POP_NEEDS_COMMENT;
 352
 353   if (d == NULL)
 354     {
 355       printf ("haven't found new directory \"%s\"\n", buf);
 356       exit (1);
 357     }
 358
 359   if (closedir (dir2) < 0)
 360     {
 361       printf ("closing dir2 failed: %m\n");
 362       result = 1;
 363     }
 364
 365   if (chdir (buf) < 0)
 366     {
 367       printf ("cannot change to new directory: %m\n");
 368       exit (1);
 369     }
 370
 371   dir2 = opendir (buf);
 372   if (dir2 == NULL)
 373     {
 374       printf ("cannot open new directory: %m\n");
 375       exit (1);
 376     }
 377
 378   if (fstat64 (dirfd (dir2), &st2) < 0)
 379     {
 380       printf ("cannot fstat new directory \"%s\": %m\n", buf);
 381       exit (1);
 382     }
 383   if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
 384     {
 385       printf ("stat of new directory failed: (%lld,%lld) vs (%lld,%lld)\n",
 386               (long long int) st1.st_dev, (long long int) st1.st_ino,
 387               (long long int) st2.st_dev, (long long int) st2.st_ino);
 388       exit (1);
 389     }
 390
 391   if (mkdir ("another-dir", 0777) < 0)
 392     {
 393       printf ("cannot create \"another-dir\": %m\n");
 394       exit (1);
 395     }
 396   fd = open ("and-a-file", O_RDWR | O_CREAT | O_EXCL, 0666);
 397   if (fd == -1)
 398     {
 399       printf ("cannot create \"and-a-file\": %m\n");
 400       exit (1);
 401     }
 402   close (fd);
 403
 404   /* Some tests about error reporting.  */
 405   errno = 0;
 406   if (chdir ("and-a-file") >= 0)
 407     {
 408       printf ("chdir to \"and-a-file\" succeeded\n");
 409       exit (1);
 410     }
 411   if (errno != ENOTDIR)
 412     {
 413       printf ("chdir to \"and-a-file\" didn't set correct error\n");
 414       result = 1;
 415     }
 416
 417   errno = 0;
 418   if (chdir ("and-a-file/..") >= 0)
 419     {
 420       printf ("chdir to \"and-a-file/..\" succeeded\n");
 421       exit (1);
 422     }
 423   if (errno != ENOTDIR)
 424     {
 425       printf ("chdir to \"and-a-file/..\" didn't set correct error\n");
 426       result = 1;
 427     }
 428
 429   errno = 0;
 430   if (chdir ("another-dir/../and-a-file") >= 0)
 431     {
 432       printf ("chdir to \"another-dir/../and-a-file\" succeeded\n");
 433       exit (1);
 434     }
 435   if (errno != ENOTDIR)
 436     {
 437       printf ("chdir to \"another-dir/../and-a-file\" didn't set correct error\n");
 438       result = 1;
 439     }
 440
 441   /* The test below covers the deprecated readdir64_r function.  */
 442   DIAG_PUSH_NEEDS_COMMENT;
 443   DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
 444
 445   /* We now should have a directory and a file in the new directory.  */
 446   rewinddir (dir2);
 447   while (readdir64_r (dir2, &direntbuf.d, &d) == 0 && d != NULL)
 448     {
 449       if (strcmp (d->d_name, ".") == 0
 450           || strcmp (d->d_name, "..") == 0
 451           || strcmp (d->d_name, "another-dir") == 0)
 452         {
 453           if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
 454             {
 455               printf ("d_type for \"%s\" is wrong\n", d->d_name);
 456               result = 1;
 457             }
 458           if (stat64 (d->d_name, &st3) < 0)
 459             {
 460               printf ("cannot stat \"%s\" is wrong\n", d->d_name);
 461               result = 1;
 462             }
 463           else if (! S_ISDIR (st3.st_mode))
 464             {
 465               printf ("\"%s\" is no directory\n", d->d_name);
 466               result = 1;
 467             }
 468         }
 469       else if (strcmp (d->d_name, "and-a-file") == 0)
 470         {
 471           if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG)
 472             {
 473               printf ("d_type for \"%s\" is wrong\n", d->d_name);
 474               result = 1;
 475             }
 476           if (stat64 (d->d_name, &st3) < 0)
 477             {
 478               printf ("cannot stat \"%s\" is wrong\n", d->d_name);
 479               result = 1;
 480             }
 481           else if (! S_ISREG (st3.st_mode))
 482             {
 483               printf ("\"%s\" is no regular file\n", d->d_name);
 484               result = 1;
 485             }
 486         }
 487       else
 488         {
 489           printf ("unexpected directory entry \"%s\"\n", d->d_name);
 490           result = 1;
 491         }
 492     }
 493
 494   DIAG_POP_NEEDS_COMMENT;
 495
 496   if (stat64 ("does-not-exist", &st1) >= 0)
 497     {
 498       puts ("stat for unexisting file did not fail");
 499       result = 1;
 500     }
 501
 502   /* Free all resources.  */
 503
 504   if (closedir (dir1) < 0)
 505     {
 506       printf ("closing dir1 failed: %m\n");
 507       result = 1;
 508     }
 509   if (closedir (dir2) < 0)
 510     {
 511       printf ("second closing dir2 failed: %m\n");
 512       result = 1;
 513     }
 514
 515   if (rmdir ("another-dir") < 0)
 516     {
 517       printf ("cannot remove \"another-dir\": %m\n");
 518       result = 1;
 519     }
 520
 521   if (unlink ("and-a-file") < 0)
 522     {
 523       printf ("cannot remove \"and-a-file\": %m\n");
 524       result = 1;
 525     }
 526
 527   /* One more test before we leave: mkdir() is supposed to fail with
 528      EEXIST if the named file is a symlink.  */
 529   if (symlink ("a-symlink", "a-symlink") != 0)
 530     {
 531       printf ("cannot create symlink \"a-symlink\": %m\n");
 532       result = 1;
 533     }
 534   else
 535     {
 536       if (mkdir ("a-symlink", 0666) == 0)
 537         {
 538           puts ("can make directory \"a-symlink\"");
 539           result = 1;
 540         }
 541       else if (errno != EEXIST)
 542         {
 543           puts ("mkdir(\"a-symlink\") does not fail with EEXIST\n");
 544           result = 1;
 545         }
 546       if (unlink ("a-symlink") < 0)
 547         {
 548           printf ("cannot unlink \"a-symlink\": %m\n");
 549           result = 1;
 550         }
 551     }
 552
 553   if (chdir (srcdir) < 0)
 554     {
 555       printf ("cannot change back to source directory: %m\n");
 556       exit (1);
 557     }
 558
 559   if (rmdir (buf) < 0)
 560     {
 561       printf ("cannot remove \"%s\": %m\n", buf);
 562       result = 1;
 563     }
 564   free (objdir_copy1);
 565   free (objdir_copy2);
 566
 567   if (result == 0)
 568     puts ("all OK");
 569
 570   return result;
 571 }