src/test/test-fs-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <unistd.h>
   4
   5 #include "alloc-util.h"
   6 #include "fd-util.h"
   7 #include "fs-util.h"
   8 #include "id128-util.h"
   9 #include "macro.h"
  10 #include "mkdir.h"
  11 #include "path-util.h"
  12 #include "rm-rf.h"
  13 #include "stdio-util.h"
  14 #include "string-util.h"
  15 #include "strv.h"
  16 #include "tests.h"
  17 #include "tmpfile-util.h"
  18 #include "umask-util.h"
  19 #include "user-util.h"
  20 #include "util.h"
  21 #include "virt.h"
  22
  23 static const char *arg_test_dir = NULL;
  24
  25 static void test_chase_symlinks(void) {
  26         _cleanup_free_ char *result = NULL;
  27         char *temp;
  28         const char *top, *p, *pslash, *q, *qslash;
  29         struct stat st;
  30         int r, pfd;
  31
  32         log_info("/* %s */", __func__);
  33
  34         temp = strjoina(arg_test_dir ?: "/tmp", "/test-chase.XXXXXX");
  35         assert_se(mkdtemp(temp));
  36
  37         top = strjoina(temp, "/top");
  38         assert_se(mkdir(top, 0700) >= 0);
  39
  40         p = strjoina(top, "/dot");
  41         if (symlink(".", p) < 0) {
  42                 assert_se(IN_SET(errno, EINVAL, ENOSYS, ENOTTY, EPERM));
  43                 log_tests_skipped_errno(errno, "symlink() not possible");
  44                 goto cleanup;
  45         };
  46
  47         p = strjoina(top, "/dotdot");
  48         assert_se(symlink("..", p) >= 0);
  49
  50         p = strjoina(top, "/dotdota");
  51         assert_se(symlink("../a", p) >= 0);
  52
  53         p = strjoina(temp, "/a");
  54         assert_se(symlink("b", p) >= 0);
  55
  56         p = strjoina(temp, "/b");
  57         assert_se(symlink("/usr", p) >= 0);
  58
  59         p = strjoina(temp, "/start");
  60         assert_se(symlink("top/dot/dotdota", p) >= 0);
  61
  62         /* Paths that use symlinks underneath the "root" */
  63
  64         r = chase_symlinks(p, NULL, 0, &result, NULL);
  65         assert_se(r > 0);
  66         assert_se(path_equal(result, "/usr"));
  67         result = mfree(result);
  68
  69         pslash = strjoina(p, "/");
  70         r = chase_symlinks(pslash, NULL, 0, &result, NULL);
  71         assert_se(r > 0);
  72         assert_se(path_equal(result, "/usr/"));
  73         result = mfree(result);
  74
  75         r = chase_symlinks(p, temp, 0, &result, NULL);
  76         assert_se(r == -ENOENT);
  77
  78         r = chase_symlinks(pslash, temp, 0, &result, NULL);
  79         assert_se(r == -ENOENT);
  80
  81         q = strjoina(temp, "/usr");
  82
  83         r = chase_symlinks(p, temp, CHASE_NONEXISTENT, &result, NULL);
  84         assert_se(r == 0);
  85         assert_se(path_equal(result, q));
  86         result = mfree(result);
  87
  88         qslash = strjoina(q, "/");
  89
  90         r = chase_symlinks(pslash, temp, CHASE_NONEXISTENT, &result, NULL);
  91         assert_se(r == 0);
  92         assert_se(path_equal(result, qslash));
  93         result = mfree(result);
  94
  95         assert_se(mkdir(q, 0700) >= 0);
  96
  97         r = chase_symlinks(p, temp, 0, &result, NULL);
  98         assert_se(r > 0);
  99         assert_se(path_equal(result, q));
 100         result = mfree(result);
 101
 102         r = chase_symlinks(pslash, temp, 0, &result, NULL);
 103         assert_se(r > 0);
 104         assert_se(path_equal(result, qslash));
 105         result = mfree(result);
 106
 107         p = strjoina(temp, "/slash");
 108         assert_se(symlink("/", p) >= 0);
 109
 110         r = chase_symlinks(p, NULL, 0, &result, NULL);
 111         assert_se(r > 0);
 112         assert_se(path_equal(result, "/"));
 113         result = mfree(result);
 114
 115         r = chase_symlinks(p, temp, 0, &result, NULL);
 116         assert_se(r > 0);
 117         assert_se(path_equal(result, temp));
 118         result = mfree(result);
 119
 120         /* Paths that would "escape" outside of the "root" */
 121
 122         p = strjoina(temp, "/6dots");
 123         assert_se(symlink("../../..", p) >= 0);
 124
 125         r = chase_symlinks(p, temp, 0, &result, NULL);
 126         assert_se(r > 0 && path_equal(result, temp));
 127         result = mfree(result);
 128
 129         p = strjoina(temp, "/6dotsusr");
 130         assert_se(symlink("../../../usr", p) >= 0);
 131
 132         r = chase_symlinks(p, temp, 0, &result, NULL);
 133         assert_se(r > 0 && path_equal(result, q));
 134         result = mfree(result);
 135
 136         p = strjoina(temp, "/top/8dotsusr");
 137         assert_se(symlink("../../../../usr", p) >= 0);
 138
 139         r = chase_symlinks(p, temp, 0, &result, NULL);
 140         assert_se(r > 0 && path_equal(result, q));
 141         result = mfree(result);
 142
 143         /* Paths that contain repeated slashes */
 144
 145         p = strjoina(temp, "/slashslash");
 146         assert_se(symlink("///usr///", p) >= 0);
 147
 148         r = chase_symlinks(p, NULL, 0, &result, NULL);
 149         assert_se(r > 0);
 150         assert_se(path_equal(result, "/usr"));
 151         result = mfree(result);
 152
 153         r = chase_symlinks(p, temp, 0, &result, NULL);
 154         assert_se(r > 0);
 155         assert_se(path_equal(result, q));
 156         result = mfree(result);
 157
 158         /* Paths underneath the "root" with different UIDs while using CHASE_SAFE */
 159
 160         if (geteuid() == 0) {
 161                 p = strjoina(temp, "/user");
 162                 assert_se(mkdir(p, 0755) >= 0);
 163                 assert_se(chown(p, UID_NOBODY, GID_NOBODY) >= 0);
 164
 165                 q = strjoina(temp, "/user/root");
 166                 assert_se(mkdir(q, 0755) >= 0);
 167
 168                 p = strjoina(q, "/link");
 169                 assert_se(symlink("/", p) >= 0);
 170
 171                 /* Fail when user-owned directories contain root-owned subdirectories. */
 172                 r = chase_symlinks(p, temp, CHASE_SAFE, &result, NULL);
 173                 assert_se(r == -ENOLINK);
 174                 result = mfree(result);
 175
 176                 /* Allow this when the user-owned directories are all in the "root". */
 177                 r = chase_symlinks(p, q, CHASE_SAFE, &result, NULL);
 178                 assert_se(r > 0);
 179                 result = mfree(result);
 180         }
 181
 182         /* Paths using . */
 183
 184         r = chase_symlinks("/etc/./.././", NULL, 0, &result, NULL);
 185         assert_se(r > 0);
 186         assert_se(path_equal(result, "/"));
 187         result = mfree(result);
 188
 189         r = chase_symlinks("/etc/./.././", "/etc", 0, &result, NULL);
 190         assert_se(r > 0 && path_equal(result, "/etc"));
 191         result = mfree(result);
 192
 193         r = chase_symlinks("/../.././//../../etc", NULL, 0, &result, NULL);
 194         assert_se(r > 0);
 195         assert_se(streq(result, "/etc"));
 196         result = mfree(result);
 197
 198         r = chase_symlinks("/../.././//../../test-chase.fsldajfl", NULL, CHASE_NONEXISTENT, &result, NULL);
 199         assert_se(r == 0);
 200         assert_se(streq(result, "/test-chase.fsldajfl"));
 201         result = mfree(result);
 202
 203         r = chase_symlinks("/../.././//../../etc", "/", CHASE_PREFIX_ROOT, &result, NULL);
 204         assert_se(r > 0);
 205         assert_se(streq(result, "/etc"));
 206         result = mfree(result);
 207
 208         r = chase_symlinks("/../.././//../../test-chase.fsldajfl", "/", CHASE_PREFIX_ROOT|CHASE_NONEXISTENT, &result, NULL);
 209         assert_se(r == 0);
 210         assert_se(streq(result, "/test-chase.fsldajfl"));
 211         result = mfree(result);
 212
 213         r = chase_symlinks("/etc/machine-id/foo", NULL, 0, &result, NULL);
 214         assert_se(r == -ENOTDIR);
 215         result = mfree(result);
 216
 217         /* Path that loops back to self */
 218
 219         p = strjoina(temp, "/recursive-symlink");
 220         assert_se(symlink("recursive-symlink", p) >= 0);
 221         r = chase_symlinks(p, NULL, 0, &result, NULL);
 222         assert_se(r == -ELOOP);
 223
 224         /* Path which doesn't exist */
 225
 226         p = strjoina(temp, "/idontexist");
 227         r = chase_symlinks(p, NULL, 0, &result, NULL);
 228         assert_se(r == -ENOENT);
 229
 230         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result, NULL);
 231         assert_se(r == 0);
 232         assert_se(path_equal(result, p));
 233         result = mfree(result);
 234
 235         p = strjoina(temp, "/idontexist/meneither");
 236         r = chase_symlinks(p, NULL, 0, &result, NULL);
 237         assert_se(r == -ENOENT);
 238
 239         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result, NULL);
 240         assert_se(r == 0);
 241         assert_se(path_equal(result, p));
 242         result = mfree(result);
 243
 244         /* Path which doesn't exist, but contains weird stuff */
 245
 246         p = strjoina(temp, "/idontexist/..");
 247         r = chase_symlinks(p, NULL, 0, &result, NULL);
 248         assert_se(r == -ENOENT);
 249
 250         r = chase_symlinks(p, NULL, CHASE_NONEXISTENT, &result, NULL);
 251         assert_se(r == -ENOENT);
 252
 253         p = strjoina(temp, "/target");
 254         q = strjoina(temp, "/top");
 255         assert_se(symlink(q, p) >= 0);
 256         p = strjoina(temp, "/target/idontexist");
 257         r = chase_symlinks(p, NULL, 0, &result, NULL);
 258         assert_se(r == -ENOENT);
 259
 260         if (geteuid() == 0) {
 261                 p = strjoina(temp, "/priv1");
 262                 assert_se(mkdir(p, 0755) >= 0);
 263
 264                 q = strjoina(p, "/priv2");
 265                 assert_se(mkdir(q, 0755) >= 0);
 266
 267                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) >= 0);
 268
 269                 assert_se(chown(q, UID_NOBODY, GID_NOBODY) >= 0);
 270                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) >= 0);
 271
 272                 assert_se(chown(p, UID_NOBODY, GID_NOBODY) >= 0);
 273                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) >= 0);
 274
 275                 assert_se(chown(q, 0, 0) >= 0);
 276                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) == -ENOLINK);
 277
 278                 assert_se(rmdir(q) >= 0);
 279                 assert_se(symlink("/etc/passwd", q) >= 0);
 280                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) == -ENOLINK);
 281
 282                 assert_se(chown(p, 0, 0) >= 0);
 283                 assert_se(chase_symlinks(q, NULL, CHASE_SAFE, NULL, NULL) >= 0);
 284         }
 285
 286         p = strjoina(temp, "/machine-id-test");
 287         assert_se(symlink("/usr/../etc/./machine-id", p) >= 0);
 288
 289         r = chase_symlinks(p, NULL, 0, NULL, &pfd);
 290         if (r != -ENOENT) {
 291                 _cleanup_close_ int fd = -1;
 292                 sd_id128_t a, b;
 293
 294                 assert_se(pfd >= 0);
 295
 296                 fd = fd_reopen(pfd, O_RDONLY|O_CLOEXEC);
 297                 assert_se(fd >= 0);
 298                 safe_close(pfd);
 299
 300                 assert_se(id128_read_fd(fd, ID128_PLAIN, &a) >= 0);
 301                 assert_se(sd_id128_get_machine(&b) >= 0);
 302                 assert_se(sd_id128_equal(a, b));
 303         }
 304
 305         /* Test CHASE_NOFOLLOW */
 306
 307         p = strjoina(temp, "/target");
 308         q = strjoina(temp, "/symlink");
 309         assert_se(symlink(p, q) >= 0);
 310         r = chase_symlinks(q, NULL, CHASE_NOFOLLOW, &result, &pfd);
 311         assert_se(r >= 0);
 312         assert_se(pfd >= 0);
 313         assert_se(path_equal(result, q));
 314         assert_se(fstat(pfd, &st) >= 0);
 315         assert_se(S_ISLNK(st.st_mode));
 316         result = mfree(result);
 317
 318         /* s1 -> s2 -> nonexistent */
 319         q = strjoina(temp, "/s1");
 320         assert_se(symlink("s2", q) >= 0);
 321         p = strjoina(temp, "/s2");
 322         assert_se(symlink("nonexistent", p) >= 0);
 323         r = chase_symlinks(q, NULL, CHASE_NOFOLLOW, &result, &pfd);
 324         assert_se(r >= 0);
 325         assert_se(pfd >= 0);
 326         assert_se(path_equal(result, q));
 327         assert_se(fstat(pfd, &st) >= 0);
 328         assert_se(S_ISLNK(st.st_mode));
 329         result = mfree(result);
 330
 331         /* Test CHASE_ONE */
 332
 333         p = strjoina(temp, "/start");
 334         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 335         assert_se(r == 0);
 336         p = strjoina(temp, "/top/dot/dotdota");
 337         assert_se(streq(p, result));
 338         result = mfree(result);
 339
 340         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 341         assert_se(r == 0);
 342         p = strjoina(temp, "/top/./dotdota");
 343         assert_se(streq(p, result));
 344         result = mfree(result);
 345
 346         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 347         assert_se(r == 0);
 348         p = strjoina(temp, "/top/../a");
 349         assert_se(streq(p, result));
 350         result = mfree(result);
 351
 352         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 353         assert_se(r == 0);
 354         p = strjoina(temp, "/a");
 355         assert_se(streq(p, result));
 356         result = mfree(result);
 357
 358         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 359         assert_se(r == 0);
 360         p = strjoina(temp, "/b");
 361         assert_se(streq(p, result));
 362         result = mfree(result);
 363
 364         r = chase_symlinks(p, NULL, CHASE_STEP, &result, NULL);
 365         assert_se(r == 0);
 366         assert_se(streq("/usr", result));
 367         result = mfree(result);
 368
 369         r = chase_symlinks("/usr", NULL, CHASE_STEP, &result, NULL);
 370         assert_se(r > 0);
 371         assert_se(streq("/usr", result));
 372         result = mfree(result);
 373
 374  cleanup:
 375         assert_se(rm_rf(temp, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
 376 }
 377
 378 static void test_unlink_noerrno(void) {
 379         char *name;
 380         int fd;
 381
 382         log_info("/* %s */", __func__);
 383
 384         name = strjoina(arg_test_dir ?: "/tmp", "/test-close_nointr.XXXXXX");
 385         fd = mkostemp_safe(name);
 386         assert_se(fd >= 0);
 387         assert_se(close_nointr(fd) >= 0);
 388
 389         {
 390                 PROTECT_ERRNO;
 391                 errno = 42;
 392                 assert_se(unlink_noerrno(name) >= 0);
 393                 assert_se(errno == 42);
 394                 assert_se(unlink_noerrno(name) < 0);
 395                 assert_se(errno == 42);
 396         }
 397 }
 398
 399 static void test_readlink_and_make_absolute(void) {
 400         const char *tempdir, *name, *name2, *name_alias;
 401         _cleanup_free_ char *r1 = NULL, *r2 = NULL, *pwd = NULL;
 402
 403         log_info("/* %s */", __func__);
 404
 405         tempdir = strjoina(arg_test_dir ?: "/tmp", "/test-readlink_and_make_absolute");
 406         name = strjoina(tempdir, "/original");
 407         name2 = "test-readlink_and_make_absolute/original";
 408         name_alias = strjoina(arg_test_dir ?: "/tmp", "/test-readlink_and_make_absolute-alias");
 409
 410         assert_se(mkdir_safe(tempdir, 0755, getuid(), getgid(), MKDIR_WARN_MODE) >= 0);
 411         assert_se(touch(name) >= 0);
 412
 413         if (symlink(name, name_alias) < 0) {
 414                 assert_se(IN_SET(errno, EINVAL, ENOSYS, ENOTTY, EPERM));
 415                 log_tests_skipped_errno(errno, "symlink() not possible");
 416         } else {
 417                 assert_se(readlink_and_make_absolute(name_alias, &r1) >= 0);
 418                 assert_se(streq(r1, name));
 419                 assert_se(unlink(name_alias) >= 0);
 420
 421                 assert_se(safe_getcwd(&pwd) >= 0);
 422
 423                 assert_se(chdir(tempdir) >= 0);
 424                 assert_se(symlink(name2, name_alias) >= 0);
 425                 assert_se(readlink_and_make_absolute(name_alias, &r2) >= 0);
 426                 assert_se(streq(r2, name));
 427                 assert_se(unlink(name_alias) >= 0);
 428
 429                 assert_se(chdir(pwd) >= 0);
 430         }
 431
 432         assert_se(rm_rf(tempdir, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
 433 }
 434
 435 static void test_get_files_in_directory(void) {
 436         _cleanup_strv_free_ char **l = NULL, **t = NULL;
 437
 438         assert_se(get_files_in_directory(arg_test_dir ?: "/tmp", &l) >= 0);
 439         assert_se(get_files_in_directory(".", &t) >= 0);
 440         assert_se(get_files_in_directory(".", NULL) >= 0);
 441 }
 442
 443 static void test_var_tmp(void) {
 444         _cleanup_free_ char *tmpdir_backup = NULL, *temp_backup = NULL, *tmp_backup = NULL;
 445         const char *tmp_dir = NULL, *t;
 446
 447         log_info("/* %s */", __func__);
 448
 449         t = getenv("TMPDIR");
 450         if (t) {
 451                 tmpdir_backup = strdup(t);
 452                 assert_se(tmpdir_backup);
 453         }
 454
 455         t = getenv("TEMP");
 456         if (t) {
 457                 temp_backup = strdup(t);
 458                 assert_se(temp_backup);
 459         }
 460
 461         t = getenv("TMP");
 462         if (t) {
 463                 tmp_backup = strdup(t);
 464                 assert_se(tmp_backup);
 465         }
 466
 467         assert_se(unsetenv("TMPDIR") >= 0);
 468         assert_se(unsetenv("TEMP") >= 0);
 469         assert_se(unsetenv("TMP") >= 0);
 470
 471         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 472         assert_se(streq(tmp_dir, "/var/tmp"));
 473
 474         assert_se(setenv("TMPDIR", "/tmp", true) >= 0);
 475         assert_se(streq(getenv("TMPDIR"), "/tmp"));
 476
 477         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 478         assert_se(streq(tmp_dir, "/tmp"));
 479
 480         assert_se(setenv("TMPDIR", "/88_does_not_exist_88", true) >= 0);
 481         assert_se(streq(getenv("TMPDIR"), "/88_does_not_exist_88"));
 482
 483         assert_se(var_tmp_dir(&tmp_dir) >= 0);
 484         assert_se(streq(tmp_dir, "/var/tmp"));
 485
 486         if (tmpdir_backup)  {
 487                 assert_se(setenv("TMPDIR", tmpdir_backup, true) >= 0);
 488                 assert_se(streq(getenv("TMPDIR"), tmpdir_backup));
 489         }
 490
 491         if (temp_backup)  {
 492                 assert_se(setenv("TEMP", temp_backup, true) >= 0);
 493                 assert_se(streq(getenv("TEMP"), temp_backup));
 494         }
 495
 496         if (tmp_backup)  {
 497                 assert_se(setenv("TMP", tmp_backup, true) >= 0);
 498                 assert_se(streq(getenv("TMP"), tmp_backup));
 499         }
 500 }
 501
 502 static void test_dot_or_dot_dot(void) {
 503         log_info("/* %s */", __func__);
 504
 505         assert_se(!dot_or_dot_dot(NULL));
 506         assert_se(!dot_or_dot_dot(""));
 507         assert_se(!dot_or_dot_dot("xxx"));
 508         assert_se(dot_or_dot_dot("."));
 509         assert_se(dot_or_dot_dot(".."));
 510         assert_se(!dot_or_dot_dot(".foo"));
 511         assert_se(!dot_or_dot_dot("..foo"));
 512 }
 513
 514 static void test_access_fd(void) {
 515         _cleanup_(rmdir_and_freep) char *p = NULL;
 516         _cleanup_close_ int fd = -1;
 517         const char *a;
 518
 519         log_info("/* %s */", __func__);
 520
 521         a = strjoina(arg_test_dir ?: "/tmp", "/access-fd.XXXXXX");
 522         assert_se(mkdtemp_malloc(a, &p) >= 0);
 523
 524         fd = open(p, O_RDONLY|O_DIRECTORY|O_CLOEXEC);
 525         assert_se(fd >= 0);
 526
 527         assert_se(access_fd(fd, R_OK) >= 0);
 528         assert_se(access_fd(fd, F_OK) >= 0);
 529         assert_se(access_fd(fd, W_OK) >= 0);
 530
 531         assert_se(fchmod(fd, 0000) >= 0);
 532
 533         assert_se(access_fd(fd, F_OK) >= 0);
 534
 535         if (geteuid() == 0) {
 536                 assert_se(access_fd(fd, R_OK) >= 0);
 537                 assert_se(access_fd(fd, W_OK) >= 0);
 538         } else {
 539                 assert_se(access_fd(fd, R_OK) == -EACCES);
 540                 assert_se(access_fd(fd, W_OK) == -EACCES);
 541         }
 542 }
 543
 544 static void test_touch_file(void) {
 545         uid_t test_uid, test_gid;
 546         _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
 547         struct stat st;
 548         const char *a;
 549         usec_t test_mtime;
 550         int r;
 551
 552         log_info("/* %s */", __func__);
 553
 554         test_uid = geteuid() == 0 ? 65534 : getuid();
 555         test_gid = geteuid() == 0 ? 65534 : getgid();
 556
 557         test_mtime = usec_sub_unsigned(now(CLOCK_REALTIME), USEC_PER_WEEK);
 558
 559         a = strjoina(arg_test_dir ?: "/dev/shm", "/touch-file-XXXXXX");
 560         assert_se(mkdtemp_malloc(a, &p) >= 0);
 561
 562         a = strjoina(p, "/regular");
 563         r = touch_file(a, false, test_mtime, test_uid, test_gid, 0640);
 564         if (r < 0) {
 565                 assert_se(IN_SET(r, -EINVAL, -ENOSYS, -ENOTTY, -EPERM));
 566                 log_tests_skipped_errno(errno, "touch_file() not possible");
 567                 return;
 568         }
 569
 570         assert_se(lstat(a, &st) >= 0);
 571         assert_se(st.st_uid == test_uid);
 572         assert_se(st.st_gid == test_gid);
 573         assert_se(S_ISREG(st.st_mode));
 574         assert_se((st.st_mode & 0777) == 0640);
 575         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 576
 577         a = strjoina(p, "/dir");
 578         assert_se(mkdir(a, 0775) >= 0);
 579         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 580         assert_se(lstat(a, &st) >= 0);
 581         assert_se(st.st_uid == test_uid);
 582         assert_se(st.st_gid == test_gid);
 583         assert_se(S_ISDIR(st.st_mode));
 584         assert_se((st.st_mode & 0777) == 0640);
 585         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 586
 587         a = strjoina(p, "/fifo");
 588         assert_se(mkfifo(a, 0775) >= 0);
 589         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 590         assert_se(lstat(a, &st) >= 0);
 591         assert_se(st.st_uid == test_uid);
 592         assert_se(st.st_gid == test_gid);
 593         assert_se(S_ISFIFO(st.st_mode));
 594         assert_se((st.st_mode & 0777) == 0640);
 595         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 596
 597         a = strjoina(p, "/sock");
 598         assert_se(mknod(a, 0775 | S_IFSOCK, 0) >= 0);
 599         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 600         assert_se(lstat(a, &st) >= 0);
 601         assert_se(st.st_uid == test_uid);
 602         assert_se(st.st_gid == test_gid);
 603         assert_se(S_ISSOCK(st.st_mode));
 604         assert_se((st.st_mode & 0777) == 0640);
 605         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 606
 607         if (geteuid() == 0) {
 608                 a = strjoina(p, "/cdev");
 609                 r = mknod(a, 0775 | S_IFCHR, makedev(0, 0));
 610                 if (r < 0 && errno == EPERM && detect_container() > 0) {
 611                         log_notice("Running in unprivileged container? Skipping remaining tests in %s", __func__);
 612                         return;
 613                 }
 614                 assert_se(r >= 0);
 615                 assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 616                 assert_se(lstat(a, &st) >= 0);
 617                 assert_se(st.st_uid == test_uid);
 618                 assert_se(st.st_gid == test_gid);
 619                 assert_se(S_ISCHR(st.st_mode));
 620                 assert_se((st.st_mode & 0777) == 0640);
 621                 assert_se(timespec_load(&st.st_mtim) == test_mtime);
 622
 623                 a = strjoina(p, "/bdev");
 624                 assert_se(mknod(a, 0775 | S_IFBLK, makedev(0, 0)) >= 0);
 625                 assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 626                 assert_se(lstat(a, &st) >= 0);
 627                 assert_se(st.st_uid == test_uid);
 628                 assert_se(st.st_gid == test_gid);
 629                 assert_se(S_ISBLK(st.st_mode));
 630                 assert_se((st.st_mode & 0777) == 0640);
 631                 assert_se(timespec_load(&st.st_mtim) == test_mtime);
 632         }
 633
 634         a = strjoina(p, "/lnk");
 635         assert_se(symlink("target", a) >= 0);
 636         assert_se(touch_file(a, false, test_mtime, test_uid, test_gid, 0640) >= 0);
 637         assert_se(lstat(a, &st) >= 0);
 638         assert_se(st.st_uid == test_uid);
 639         assert_se(st.st_gid == test_gid);
 640         assert_se(S_ISLNK(st.st_mode));
 641         assert_se(timespec_load(&st.st_mtim) == test_mtime);
 642 }
 643
 644 static void test_unlinkat_deallocate(void) {
 645         _cleanup_free_ char *p = NULL;
 646         _cleanup_close_ int fd = -1;
 647         struct stat st;
 648
 649         log_info("/* %s */", __func__);
 650
 651         assert_se(tempfn_random_child(arg_test_dir, "unlink-deallocation", &p) >= 0);
 652
 653         fd = open(p, O_WRONLY|O_CLOEXEC|O_CREAT|O_EXCL, 0600);
 654         assert_se(fd >= 0);
 655
 656         assert_se(write(fd, "hallo\n", 6) == 6);
 657
 658         assert_se(fstat(fd, &st) >= 0);
 659         assert_se(st.st_size == 6);
 660         assert_se(st.st_blocks > 0);
 661         assert_se(st.st_nlink == 1);
 662
 663         assert_se(unlinkat_deallocate(AT_FDCWD, p, 0) >= 0);
 664
 665         assert_se(fstat(fd, &st) >= 0);
 666         assert_se(IN_SET(st.st_size, 0, 6)); /* depending on whether hole punching worked the size will be 6
 667                                                 (it worked) or 0 (we had to resort to truncation) */
 668         assert_se(st.st_blocks == 0);
 669         assert_se(st.st_nlink == 0);
 670 }
 671
 672 static void test_fsync_directory_of_file(void) {
 673         _cleanup_close_ int fd = -1;
 674
 675         log_info("/* %s */", __func__);
 676
 677         fd = open_tmpfile_unlinkable(arg_test_dir, O_RDWR);
 678         assert_se(fd >= 0);
 679
 680         assert_se(fsync_directory_of_file(fd) >= 0);
 681 }
 682
 683 static void test_rename_noreplace(void) {
 684         static const char* const table[] = {
 685                 "/reg",
 686                 "/dir",
 687                 "/fifo",
 688                 "/socket",
 689                 "/symlink",
 690                 NULL
 691         };
 692
 693         _cleanup_(rm_rf_physical_and_freep) char *z = NULL;
 694         const char *j = NULL;
 695         char **a, **b;
 696
 697         log_info("/* %s */", __func__);
 698
 699         if (arg_test_dir)
 700                 j = strjoina(arg_test_dir, "/testXXXXXX");
 701         assert_se(mkdtemp_malloc(j, &z) >= 0);
 702
 703         j = strjoina(z, table[0]);
 704         assert_se(touch(j) >= 0);
 705
 706         j = strjoina(z, table[1]);
 707         assert_se(mkdir(j, 0777) >= 0);
 708
 709         j = strjoina(z, table[2]);
 710         (void) mkfifo(j, 0777);
 711
 712         j = strjoina(z, table[3]);
 713         (void) mknod(j, S_IFSOCK | 0777, 0);
 714
 715         j = strjoina(z, table[4]);
 716         (void) symlink("foobar", j);
 717
 718         STRV_FOREACH(a, (char**) table) {
 719                 _cleanup_free_ char *x = NULL, *y = NULL;
 720
 721                 x = strjoin(z, *a);
 722                 assert_se(x);
 723
 724                 if (access(x, F_OK) < 0) {
 725                         assert_se(errno == ENOENT);
 726                         continue;
 727                 }
 728
 729                 STRV_FOREACH(b, (char**) table) {
 730                         _cleanup_free_ char *w = NULL;
 731
 732                         w = strjoin(w, *b);
 733                         assert_se(w);
 734
 735                         if (access(w, F_OK) < 0) {
 736                                 assert_se(errno == ENOENT);
 737                                 continue;
 738                         }
 739
 740                         assert_se(rename_noreplace(AT_FDCWD, w, AT_FDCWD, y) == -EEXIST);
 741                 }
 742
 743                 y = strjoin(z, "/somethingelse");
 744                 assert_se(y);
 745
 746                 assert_se(rename_noreplace(AT_FDCWD, x, AT_FDCWD, y) >= 0);
 747                 assert_se(rename_noreplace(AT_FDCWD, y, AT_FDCWD, x) >= 0);
 748         }
 749 }
 750
 751 static void test_chmod_and_chown(void) {
 752         _cleanup_(rm_rf_physical_and_freep) char *d = NULL;
 753         _unused_ _cleanup_umask_ mode_t u = umask(0000);
 754         struct stat st;
 755         const char *p;
 756
 757         if (geteuid() != 0)
 758                 return;
 759
 760         log_info("/* %s */", __func__);
 761
 762         assert_se(mkdtemp_malloc(NULL, &d) >= 0);
 763
 764         p = strjoina(d, "/reg");
 765         assert_se(mknod(p, S_IFREG | 0123, 0) >= 0);
 766
 767         assert_se(chmod_and_chown(p, S_IFREG | 0321, 1, 2) >= 0);
 768         assert_se(chmod_and_chown(p, S_IFDIR | 0555, 3, 4) == -EINVAL);
 769
 770         assert_se(lstat(p, &st) >= 0);
 771         assert_se(S_ISREG(st.st_mode));
 772         assert_se((st.st_mode & 07777) == 0321);
 773
 774         p = strjoina(d, "/dir");
 775         assert_se(mkdir(p, 0123) >= 0);
 776
 777         assert_se(chmod_and_chown(p, S_IFDIR | 0321, 1, 2) >= 0);
 778         assert_se(chmod_and_chown(p, S_IFREG | 0555, 3, 4) == -EINVAL);
 779
 780         assert_se(lstat(p, &st) >= 0);
 781         assert_se(S_ISDIR(st.st_mode));
 782         assert_se((st.st_mode & 07777) == 0321);
 783
 784         p = strjoina(d, "/lnk");
 785         assert_se(symlink("idontexist", p) >= 0);
 786
 787         assert_se(chmod_and_chown(p, S_IFLNK | 0321, 1, 2) >= 0);
 788         assert_se(chmod_and_chown(p, S_IFREG | 0555, 3, 4) == -EINVAL);
 789         assert_se(chmod_and_chown(p, S_IFDIR | 0555, 3, 4) == -EINVAL);
 790
 791         assert_se(lstat(p, &st) >= 0);
 792         assert_se(S_ISLNK(st.st_mode));
 793 }
 794
 795 int main(int argc, char *argv[]) {
 796         test_setup_logging(LOG_INFO);
 797
 798         arg_test_dir = argv[1];
 799
 800         test_chase_symlinks();
 801         test_unlink_noerrno();
 802         test_readlink_and_make_absolute();
 803         test_get_files_in_directory();
 804         test_var_tmp();
 805         test_dot_or_dot_dot();
 806         test_access_fd();
 807         test_touch_file();
 808         test_unlinkat_deallocate();
 809         test_fsync_directory_of_file();
 810         test_rename_noreplace();
 811         test_chmod_and_chown();
 812
 813         return 0;
 814 }