summaryrefslogtreecommitdiff
path: root/posix/tst-dir.c
blob: 8897f8e06d52c21697d16967e0af48d2c302105d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
/* Copyright (C) 2000-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <mcheck.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>


/* We expect four arguments:
   - source directory name
   - object directory
   - common object directory
   - the program name with path
*/
int
main (int argc, char *argv[])
{
  const char *srcdir;
  const char *objdir;
  const char *common_objdir;
  const char *progpath;
  struct stat64 st1;
  struct stat64 st2;
  struct stat64 st3;
  DIR *dir1;
  DIR *dir2;
  int result = 0;
  struct dirent64 *d;
  union
    {
      struct dirent64 d;
      char room [offsetof (struct dirent64, d_name[0]) + NAME_MAX + 1];
    }
    direntbuf;
  char *objdir_copy1;
  char *objdir_copy2;
  char *buf;
  int fd;

  mtrace ();

  if (argc < 5)
    {
      puts ("not enough parameters");
      exit (1);
    }

  /* Make parameters available with nicer names.  */
  srcdir = argv[1];
  objdir = argv[2];
  common_objdir = argv[3];
  progpath = argv[4];

  /* First test the current source dir.  We cannot really compare the
     result of `getpwd' with the srcdir string but we have other means.  */
  if (stat64 (".", &st1) < 0)
    {
      printf ("cannot stat starting directory: %m\n");
      exit (1);
    }

  if (chdir (srcdir) < 0)
    {
      printf ("cannot change to source directory: %m\n");
      exit (1);
    }
  if (stat64 (".", &st2) < 0)
    {
      printf ("cannot stat source directory: %m\n");
      exit (1);
    }

  /* The two last stat64 calls better were for the same directory.  */
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("stat of source directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  /* Change to the object directory.  */
  if (chdir (objdir) < 0)
    {
      printf ("cannot change to object directory: %m\n");
      exit (1);
    }
  if (stat64 (".", &st1) < 0)
    {
      printf ("cannot stat object directory: %m\n");
      exit (1);
    }
  /* Is this the same we get as with the full path?  */
  if (stat64 (objdir, &st2) < 0)
    {
      printf ("cannot stat object directory with full path: %m\n");
      exit (1);
    }
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  objdir_copy1 = getcwd (NULL, 0);
  if (objdir_copy1 == NULL)
    {
      printf ("cannot get current directory name for object directory: %m\n");
      result = 1;
    }

  /* First test: this directory must include our program.  */
  if (stat64 (progpath, &st2) < 0)
    {
      printf ("cannot stat program: %m\n");
      exit (1);
    }

  dir1 = opendir (".");
  if (dir1 == NULL)
    {
      printf ("cannot open object directory: %m\n");
      exit (1);
    }

  while ((d = readdir64 (dir1)) != NULL)
    {
#ifdef _DIRENT_HAVE_D_TYPE
      if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG)
	continue;
#endif

      if (d->d_ino == st2.st_ino)
	{
	  /* Might be it.  Test the device.  We could use the st_dev
	     element from st1 but what the heck, do more testing.  */
	  if (stat64 (d->d_name, &st3) < 0)
	    {
	      printf ("cannot stat entry from readdir: %m\n");
	      result = 1;
	      d = NULL;
	      break;
	    }

	  if (st3.st_dev == st2.st_dev)
	    break;
	}
    }

  if (d == NULL)
    {
      puts ("haven't found program in object directory");
      result = 1;
    }

  /* We leave dir1 open.  */

  /* Stat using file descriptor.  */
  if (fstat64 (dirfd (dir1), &st2) < 0)
    {
      printf ("cannot fstat object directory: %m\n");
      result = 1;
    }
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("fstat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  if (chdir ("..") < 0)
    {
      printf ("cannot go to common object directory with \"..\": %m\n");
      exit (1);
    }

  if (stat64 (".", &st1) < 0)
    {
      printf ("cannot stat common object directory: %m\n");
      exit (1);
    }
  /* Is this the same we get as with the full path?  */
  if (stat64 (common_objdir, &st2) < 0)
    {
      printf ("cannot stat common object directory with full path: %m\n");
      exit (1);
    }
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  /* Stat using file descriptor.  */
  if (fstat64 (dirfd (dir1), &st2) < 0)
    {
      printf ("cannot fstat object directory: %m\n");
      result = 1;
    }

  dir2 = opendir (common_objdir);
  if (dir2 == NULL)
    {
      printf ("cannot open common object directory: %m\n");
      exit (1);
    }

  while ((d = readdir64 (dir2)) != NULL)
    {
#ifdef _DIRENT_HAVE_D_TYPE
      if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
	continue;
#endif

      if (d->d_ino == st2.st_ino)
	{
	  /* Might be it.  Test the device.  We could use the st_dev
	     element from st1 but what the heck, do more testing.  */
	  if (stat64 (d->d_name, &st3) < 0)
	    {
	      printf ("cannot stat entry from readdir: %m\n");
	      result = 1;
	      d = NULL;
	      break;
	    }

	  if (st3.st_dev == st2.st_dev)
	    break;
	}
    }

  /* This better should be the object directory again.  */
  if (fchdir (dirfd (dir1)) < 0)
    {
      printf ("cannot fchdir to object directory: %m\n");
      exit (1);
    }

  objdir_copy2 = getcwd (NULL, 0);
  if (objdir_copy2 == NULL)
    {
      printf ("cannot get current directory name for object directory: %m\n");
      result = 1;
    }
  if (strcmp (objdir_copy1, objdir_copy2) != 0)
    {
      puts ("getcwd returned a different string the second time");
      result = 1;
    }

  /* This better should be the common object directory again.  */
  if (fchdir (dirfd (dir2)) < 0)
    {
      printf ("cannot fchdir to common object directory: %m\n");
      exit (1);
    }

  if (stat64 (".", &st2) < 0)
    {
      printf ("cannot stat common object directory: %m\n");
      exit (1);
    }
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("stat of object directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  buf = (char *) malloc (strlen (objdir_copy1) + 1 + sizeof "tst-dir.XXXXXX");
  if (buf == NULL)
    {
      printf ("cannot allocate buffer: %m");
      exit (1);
    }

  stpcpy (stpcpy (stpcpy (buf, objdir_copy1), "/"), "tst-dir.XXXXXX");
  if (mkdtemp (buf) == NULL)
    {
      printf ("cannot create test directory in object directory: %m\n");
      exit (1);
    }
  if (stat64 (buf, &st1) < 0)
    {
      printf ("cannot stat new directory \"%s\": %m\n", buf);
      exit (1);
    }
  if (chmod (buf, 0700) < 0)
    {
      printf ("cannot change mode of new directory: %m\n");
      exit (1);
    }

  /* Try to find the new directory.  */
  rewinddir (dir1);
  while (readdir64_r (dir1, &direntbuf.d, &d) == 0 && d != NULL)
    {
#ifdef _DIRENT_HAVE_D_TYPE
      if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
	continue;
#endif

      if (d->d_ino == st1.st_ino)
	{
	  /* Might be it.  Test the device.  We could use the st_dev
	     element from st1 but what the heck, do more testing.  */
	  size_t len = strlen (objdir) + 1 + _D_EXACT_NAMLEN (d) + 1;
	  char tmpbuf[len];

	  stpcpy (stpcpy (stpcpy (tmpbuf, objdir), "/"), d->d_name);

	  if (stat64 (tmpbuf, &st3) < 0)
	    {
	      printf ("cannot stat entry from readdir: %m\n");
	      result = 1;
	      d = NULL;
	      break;
	    }

	  if (st3.st_dev == st2.st_dev
	      && strcmp (d->d_name, buf + strlen (buf) - 14) == 0)
	    break;
	}
    }

  if (d == NULL)
    {
      printf ("haven't found new directory \"%s\"\n", buf);
      exit (1);
    }

  if (closedir (dir2) < 0)
    {
      printf ("closing dir2 failed: %m\n");
      result = 1;
    }

  if (chdir (buf) < 0)
    {
      printf ("cannot change to new directory: %m\n");
      exit (1);
    }

  dir2 = opendir (buf);
  if (dir2 == NULL)
    {
      printf ("cannot open new directory: %m\n");
      exit (1);
    }

  if (fstat64 (dirfd (dir2), &st2) < 0)
    {
      printf ("cannot fstat new directory \"%s\": %m\n", buf);
      exit (1);
    }
  if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
    {
      printf ("stat of new directory failed: (%lld,%lld) vs (%lld,%lld)\n",
	      (long long int) st1.st_dev, (long long int) st1.st_ino,
	      (long long int) st2.st_dev, (long long int) st2.st_ino);
      exit (1);
    }

  if (mkdir ("another-dir", 0777) < 0)
    {
      printf ("cannot create \"another-dir\": %m\n");
      exit (1);
    }
  fd = open ("and-a-file", O_RDWR | O_CREAT | O_EXCL, 0666);
  if (fd == -1)
    {
      printf ("cannot create \"and-a-file\": %m\n");
      exit (1);
    }
  close (fd);

  /* Some tests about error reporting.  */
  errno = 0;
  if (chdir ("and-a-file") >= 0)
    {
      printf ("chdir to \"and-a-file\" succeeded\n");
      exit (1);
    }
  if (errno != ENOTDIR)
    {
      printf ("chdir to \"and-a-file\" didn't set correct error\n");
      result = 1;
    }

  errno = 0;
  if (chdir ("and-a-file/..") >= 0)
    {
      printf ("chdir to \"and-a-file/..\" succeeded\n");
      exit (1);
    }
  if (errno != ENOTDIR)
    {
      printf ("chdir to \"and-a-file/..\" didn't set correct error\n");
      result = 1;
    }

  errno = 0;
  if (chdir ("another-dir/../and-a-file") >= 0)
    {
      printf ("chdir to \"another-dir/../and-a-file\" succeeded\n");
      exit (1);
    }
  if (errno != ENOTDIR)
    {
      printf ("chdir to \"another-dir/../and-a-file\" didn't set correct error\n");
      result = 1;
    }

  /* We now should have a directory and a file in the new directory.  */
  rewinddir (dir2);
  while (readdir64_r (dir2, &direntbuf.d, &d) == 0 && d != NULL)
    {
      if (strcmp (d->d_name, ".") == 0
	  || strcmp (d->d_name, "..") == 0
	  || strcmp (d->d_name, "another-dir") == 0)
	{
#ifdef _DIRENT_HAVE_D_TYPE
	  if (d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
	    {
	      printf ("d_type for \"%s\" is wrong\n", d->d_name);
	      result = 1;
	    }
#endif
	  if (stat64 (d->d_name, &st3) < 0)
	    {
	      printf ("cannot stat \"%s\" is wrong\n", d->d_name);
	      result = 1;
	    }
	  else if (! S_ISDIR (st3.st_mode))
	    {
	      printf ("\"%s\" is no directory\n", d->d_name);
	      result = 1;
	    }
	}
      else if (strcmp (d->d_name, "and-a-file") == 0)
	{
#ifdef _DIRENT_HAVE_D_TYPE
	  if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG)
	    {
	      printf ("d_type for \"%s\" is wrong\n", d->d_name);
	      result = 1;
	    }
#endif
	  if (stat64 (d->d_name, &st3) < 0)
	    {
	      printf ("cannot stat \"%s\" is wrong\n", d->d_name);
	      result = 1;
	    }
	  else if (! S_ISREG (st3.st_mode))
	    {
	      printf ("\"%s\" is no regular file\n", d->d_name);
	      result = 1;
	    }
	}
      else
	{
	  printf ("unexpected directory entry \"%s\"\n", d->d_name);
	  result = 1;
	}
    }

  if (stat64 ("does-not-exist", &st1) >= 0)
    {
      puts ("stat for unexisting file did not fail");
      result = 1;
    }

  /* Free all resources.  */

  if (closedir (dir1) < 0)
    {
      printf ("closing dir1 failed: %m\n");
      result = 1;
    }
  if (closedir (dir2) < 0)
    {
      printf ("second closing dir2 failed: %m\n");
      result = 1;
    }

  if (rmdir ("another-dir") < 0)
    {
      printf ("cannot remove \"another-dir\": %m\n");
      result = 1;
    }

  if (unlink ("and-a-file") < 0)
    {
      printf ("cannot remove \"and-a-file\": %m\n");
      result = 1;
    }

  /* One more test before we leave: mkdir() is supposed to fail with
     EEXIST if the named file is a symlink.  */
  if (symlink ("a-symlink", "a-symlink") != 0)
    {
      printf ("cannot create symlink \"a-symlink\": %m\n");
      result = 1;
    }
  else
    {
      if (mkdir ("a-symlink", 0666) == 0)
	{
	  puts ("can make directory \"a-symlink\"");
	  result = 1;
	}
      else if (errno != EEXIST)
	{
	  puts ("mkdir(\"a-symlink\") does not fail with EEXIST\n");
	  result = 1;
	}
      if (unlink ("a-symlink") < 0)
	{
	  printf ("cannot unlink \"a-symlink\": %m\n");
	  result = 1;
	}
    }

  if (chdir (srcdir) < 0)
    {
      printf ("cannot change back to source directory: %m\n");
      exit (1);
    }

  if (rmdir (buf) < 0)
    {
      printf ("cannot remove \"%s\": %m\n", buf);
      result = 1;
    }
  free (objdir_copy1);
  free (objdir_copy2);

  if (result == 0)
    puts ("all OK");

  return result;
}