src/test/test-path-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Zbigniew Jędrzejewski-Szmek
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <stdio.h>
  21 #include <sys/mount.h>
  22 #include <unistd.h>
  23
  24 #include "alloc-util.h"
  25 #include "fd-util.h"
  26 #include "macro.h"
  27 #include "mount-util.h"
  28 #include "path-util.h"
  29 #include "rm-rf.h"
  30 #include "stat-util.h"
  31 #include "string-util.h"
  32 #include "strv.h"
  33 #include "util.h"
  34
  35 #define test_path_compare(a, b, result) {                 \
  36                 assert_se(path_compare(a, b) == result);  \
  37                 assert_se(path_compare(b, a) == -result); \
  38                 assert_se(path_equal(a, b) == !result);   \
  39                 assert_se(path_equal(b, a) == !result);   \
  40         }
  41
  42 static void test_path(void) {
  43         _cleanup_close_ int fd = -1;
  44
  45         test_path_compare("/goo", "/goo", 0);
  46         test_path_compare("/goo", "/goo", 0);
  47         test_path_compare("//goo", "/goo", 0);
  48         test_path_compare("//goo/////", "/goo", 0);
  49         test_path_compare("goo/////", "goo", 0);
  50
  51         test_path_compare("/goo/boo", "/goo//boo", 0);
  52         test_path_compare("//goo/boo", "/goo/boo//", 0);
  53
  54         test_path_compare("/", "///", 0);
  55
  56         test_path_compare("/x", "x/", 1);
  57         test_path_compare("x/", "/", -1);
  58
  59         test_path_compare("/x/./y", "x/y", 1);
  60         test_path_compare("x/.y", "x/y", -1);
  61
  62         test_path_compare("foo", "/foo", -1);
  63         test_path_compare("/foo", "/foo/bar", -1);
  64         test_path_compare("/foo/aaa", "/foo/b", -1);
  65         test_path_compare("/foo/aaa", "/foo/b/a", -1);
  66         test_path_compare("/foo/a", "/foo/aaa", -1);
  67         test_path_compare("/foo/a/b", "/foo/aaa", -1);
  68
  69         assert_se(path_is_absolute("/"));
  70         assert_se(!path_is_absolute("./"));
  71
  72         assert_se(is_path("/dir"));
  73         assert_se(is_path("a/b"));
  74         assert_se(!is_path("."));
  75
  76         assert_se(streq(basename("./aa/bb/../file.da."), "file.da."));
  77         assert_se(streq(basename("/aa///.file"), ".file"));
  78         assert_se(streq(basename("/aa///file..."), "file..."));
  79         assert_se(streq(basename("file.../"), ""));
  80
  81         fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY);
  82         assert_se(fd >= 0);
  83         assert_se(fd_is_mount_point(fd, "/", 0) > 0);
  84
  85         {
  86                 char p1[] = "aaa/bbb////ccc";
  87                 char p2[] = "//aaa/.////ccc";
  88                 char p3[] = "/./";
  89
  90                 assert_se(path_equal(path_kill_slashes(p1), "aaa/bbb/ccc"));
  91                 assert_se(path_equal(path_kill_slashes(p2), "/aaa/./ccc"));
  92                 assert_se(path_equal(path_kill_slashes(p3), "/./"));
  93         }
  94
  95         assert_se(PATH_IN_SET("/bin", "/", "/bin", "/foo"));
  96         assert_se(PATH_IN_SET("/bin", "/bin"));
  97         assert_se(PATH_IN_SET("/bin", "/foo/bar", "/bin"));
  98         assert_se(PATH_IN_SET("/", "/", "/", "/foo/bar"));
  99         assert_se(!PATH_IN_SET("/", "/abc", "/def"));
 100
 101         assert_se(path_equal_ptr(NULL, NULL));
 102         assert_se(path_equal_ptr("/a", "/a"));
 103         assert_se(!path_equal_ptr("/a", "/b"));
 104         assert_se(!path_equal_ptr("/a", NULL));
 105         assert_se(!path_equal_ptr(NULL, "/a"));
 106 }
 107
 108 static void test_path_equal_root(void) {
 109         /* Nail down the details of how path_equal("/", ...) works. */
 110
 111         assert_se(path_equal("/", "/"));
 112         assert_se(path_equal("/", "//"));
 113
 114         assert_se(!path_equal("/", "/./"));
 115         assert_se(!path_equal("/", "/../"));
 116
 117         assert_se(!path_equal("/", "/.../"));
 118
 119         /* Make sure that files_same works as expected. */
 120
 121         assert_se(files_same("/", "/", 0) > 0);
 122         assert_se(files_same("/", "/", AT_SYMLINK_NOFOLLOW) > 0);
 123         assert_se(files_same("/", "//", 0) > 0);
 124         assert_se(files_same("/", "//", AT_SYMLINK_NOFOLLOW) > 0);
 125
 126         assert_se(files_same("/", "/./", 0) > 0);
 127         assert_se(files_same("/", "/./", AT_SYMLINK_NOFOLLOW) > 0);
 128         assert_se(files_same("/", "/../", 0) > 0);
 129         assert_se(files_same("/", "/../", AT_SYMLINK_NOFOLLOW) > 0);
 130
 131         assert_se(files_same("/", "/.../", 0) == -ENOENT);
 132         assert_se(files_same("/", "/.../", AT_SYMLINK_NOFOLLOW) == -ENOENT);
 133
 134         /* The same for path_equal_or_files_same. */
 135
 136         assert_se(path_equal_or_files_same("/", "/", 0));
 137         assert_se(path_equal_or_files_same("/", "/", AT_SYMLINK_NOFOLLOW));
 138         assert_se(path_equal_or_files_same("/", "//", 0));
 139         assert_se(path_equal_or_files_same("/", "//", AT_SYMLINK_NOFOLLOW));
 140
 141         assert_se(path_equal_or_files_same("/", "/./", 0));
 142         assert_se(path_equal_or_files_same("/", "/./", AT_SYMLINK_NOFOLLOW));
 143         assert_se(path_equal_or_files_same("/", "/../", 0));
 144         assert_se(path_equal_or_files_same("/", "/../", AT_SYMLINK_NOFOLLOW));
 145
 146         assert_se(!path_equal_or_files_same("/", "/.../", 0));
 147         assert_se(!path_equal_or_files_same("/", "/.../", AT_SYMLINK_NOFOLLOW));
 148 }
 149
 150 static void test_find_binary(const char *self) {
 151         char *p;
 152
 153         assert_se(find_binary("/bin/sh", &p) == 0);
 154         puts(p);
 155         assert_se(path_equal(p, "/bin/sh"));
 156         free(p);
 157
 158         assert_se(find_binary(self, &p) == 0);
 159         puts(p);
 160         /* libtool might prefix the binary name with "lt-" */
 161         assert_se(endswith(p, "/lt-test-path-util") || endswith(p, "/test-path-util"));
 162         assert_se(path_is_absolute(p));
 163         free(p);
 164
 165         assert_se(find_binary("sh", &p) == 0);
 166         puts(p);
 167         assert_se(endswith(p, "/sh"));
 168         assert_se(path_is_absolute(p));
 169         free(p);
 170
 171         assert_se(find_binary("xxxx-xxxx", &p) == -ENOENT);
 172         assert_se(find_binary("/some/dir/xxxx-xxxx", &p) == -ENOENT);
 173 }
 174
 175 static void test_prefixes(void) {
 176         static const char* values[] = { "/a/b/c/d", "/a/b/c", "/a/b", "/a", "", NULL};
 177         unsigned i;
 178         char s[PATH_MAX];
 179         bool b;
 180
 181         i = 0;
 182         PATH_FOREACH_PREFIX_MORE(s, "/a/b/c/d") {
 183                 log_error("---%s---", s);
 184                 assert_se(streq(s, values[i++]));
 185         }
 186         assert_se(values[i] == NULL);
 187
 188         i = 1;
 189         PATH_FOREACH_PREFIX(s, "/a/b/c/d") {
 190                 log_error("---%s---", s);
 191                 assert_se(streq(s, values[i++]));
 192         }
 193         assert_se(values[i] == NULL);
 194
 195         i = 0;
 196         PATH_FOREACH_PREFIX_MORE(s, "////a////b////c///d///////")
 197                 assert_se(streq(s, values[i++]));
 198         assert_se(values[i] == NULL);
 199
 200         i = 1;
 201         PATH_FOREACH_PREFIX(s, "////a////b////c///d///////")
 202                 assert_se(streq(s, values[i++]));
 203         assert_se(values[i] == NULL);
 204
 205         PATH_FOREACH_PREFIX(s, "////")
 206                 assert_not_reached("Wut?");
 207
 208         b = false;
 209         PATH_FOREACH_PREFIX_MORE(s, "////") {
 210                 assert_se(!b);
 211                 assert_se(streq(s, ""));
 212                 b = true;
 213         }
 214         assert_se(b);
 215
 216         PATH_FOREACH_PREFIX(s, "")
 217                 assert_not_reached("wut?");
 218
 219         b = false;
 220         PATH_FOREACH_PREFIX_MORE(s, "") {
 221                 assert_se(!b);
 222                 assert_se(streq(s, ""));
 223                 b = true;
 224         }
 225 }
 226
 227 static void test_path_join(void) {
 228
 229 #define test_join(root, path, rest, expected) {  \
 230                 _cleanup_free_ char *z = NULL;   \
 231                 z = path_join(root, path, rest); \
 232                 assert_se(streq(z, expected));   \
 233         }
 234
 235         test_join("/root", "/a/b", "/c", "/root/a/b/c");
 236         test_join("/root", "a/b", "c", "/root/a/b/c");
 237         test_join("/root", "/a/b", "c", "/root/a/b/c");
 238         test_join("/root", "/", "c", "/root/c");
 239         test_join("/root", "/", NULL, "/root/");
 240
 241         test_join(NULL, "/a/b", "/c", "/a/b/c");
 242         test_join(NULL, "a/b", "c", "a/b/c");
 243         test_join(NULL, "/a/b", "c", "/a/b/c");
 244         test_join(NULL, "/", "c", "/c");
 245         test_join(NULL, "/", NULL, "/");
 246 }
 247
 248 static void test_fsck_exists(void) {
 249         /* Ensure we use a sane default for PATH. */
 250         unsetenv("PATH");
 251
 252         /* fsck.minix is provided by util-linux and will probably exist. */
 253         assert_se(fsck_exists("minix") == 1);
 254
 255         assert_se(fsck_exists("AbCdE") == 0);
 256         assert_se(fsck_exists("/../bin/") == 0);
 257 }
 258
 259 static void test_make_relative(void) {
 260         char *result;
 261
 262         assert_se(path_make_relative("some/relative/path", "/some/path", &result) < 0);
 263         assert_se(path_make_relative("/some/path", "some/relative/path", &result) < 0);
 264
 265 #define test(from_dir, to_path, expected) {                \
 266                 _cleanup_free_ char *z = NULL;             \
 267                 path_make_relative(from_dir, to_path, &z); \
 268                 assert_se(streq(z, expected));             \
 269         }
 270
 271         test("/", "/", ".");
 272         test("/", "/some/path", "some/path");
 273         test("/some/path", "/some/path", ".");
 274         test("/some/path", "/some/path/in/subdir", "in/subdir");
 275         test("/some/path", "/", "../..");
 276         test("/some/path", "/some/other/path", "../other/path");
 277         test("//extra/////slashes///won't////fool///anybody//", "////extra///slashes////are/just///fine///", "../../../are/just/fine");
 278 }
 279
 280 static void test_strv_resolve(void) {
 281         char tmp_dir[] = "/tmp/test-path-util-XXXXXX";
 282         _cleanup_strv_free_ char **search_dirs = NULL;
 283         _cleanup_strv_free_ char **absolute_dirs = NULL;
 284         char **d;
 285
 286         assert_se(mkdtemp(tmp_dir) != NULL);
 287
 288         search_dirs = strv_new("/dir1", "/dir2", "/dir3", NULL);
 289         assert_se(search_dirs);
 290         STRV_FOREACH(d, search_dirs) {
 291                 char *p = strappend(tmp_dir, *d);
 292                 assert_se(p);
 293                 assert_se(strv_push(&absolute_dirs, p) == 0);
 294         }
 295
 296         assert_se(mkdir(absolute_dirs[0], 0700) == 0);
 297         assert_se(mkdir(absolute_dirs[1], 0700) == 0);
 298         assert_se(symlink("dir2", absolute_dirs[2]) == 0);
 299
 300         path_strv_resolve(search_dirs, tmp_dir);
 301         assert_se(streq(search_dirs[0], "/dir1"));
 302         assert_se(streq(search_dirs[1], "/dir2"));
 303         assert_se(streq(search_dirs[2], "/dir2"));
 304
 305         assert_se(rm_rf(tmp_dir, REMOVE_ROOT|REMOVE_PHYSICAL) == 0);
 306 }
 307
 308 static void test_path_startswith(void) {
 309         const char *p;
 310
 311         p = path_startswith("/foo/bar/barfoo/", "/foo");
 312         assert_se(streq_ptr(p, "bar/barfoo/"));
 313
 314         p = path_startswith("/foo/bar/barfoo/", "/foo/");
 315         assert_se(streq_ptr(p, "bar/barfoo/"));
 316
 317         p = path_startswith("/foo/bar/barfoo/", "/");
 318         assert_se(streq_ptr(p, "foo/bar/barfoo/"));
 319
 320         p = path_startswith("/foo/bar/barfoo/", "////");
 321         assert_se(streq_ptr(p, "foo/bar/barfoo/"));
 322
 323         p = path_startswith("/foo/bar/barfoo/", "/foo//bar/////barfoo///");
 324         assert_se(streq_ptr(p, ""));
 325
 326         p = path_startswith("/foo/bar/barfoo/", "/foo/bar/barfoo////");
 327         assert_se(streq_ptr(p, ""));
 328
 329         p = path_startswith("/foo/bar/barfoo/", "/foo/bar///barfoo/");
 330         assert_se(streq_ptr(p, ""));
 331
 332         p = path_startswith("/foo/bar/barfoo/", "/foo////bar/barfoo/");
 333         assert_se(streq_ptr(p, ""));
 334
 335         p = path_startswith("/foo/bar/barfoo/", "////foo/bar/barfoo/");
 336         assert_se(streq_ptr(p, ""));
 337
 338         p = path_startswith("/foo/bar/barfoo/", "/foo/bar/barfoo");
 339         assert_se(streq_ptr(p, ""));
 340
 341         assert_se(!path_startswith("/foo/bar/barfoo/", "/foo/bar/barfooa/"));
 342         assert_se(!path_startswith("/foo/bar/barfoo/", "/foo/bar/barfooa"));
 343         assert_se(!path_startswith("/foo/bar/barfoo/", ""));
 344         assert_se(!path_startswith("/foo/bar/barfoo/", "/bar/foo"));
 345         assert_se(!path_startswith("/foo/bar/barfoo/", "/f/b/b/"));
 346 }
 347
 348 static void test_prefix_root_one(const char *r, const char *p, const char *expected) {
 349         _cleanup_free_ char *s = NULL;
 350         const char *t;
 351
 352         assert_se(s = prefix_root(r, p));
 353         assert_se(streq_ptr(s, expected));
 354
 355         t = prefix_roota(r, p);
 356         assert_se(t);
 357         assert_se(streq_ptr(t, expected));
 358 }
 359
 360 static void test_prefix_root(void) {
 361         test_prefix_root_one("/", "/foo", "/foo");
 362         test_prefix_root_one(NULL, "/foo", "/foo");
 363         test_prefix_root_one("", "/foo", "/foo");
 364         test_prefix_root_one("///", "/foo", "/foo");
 365         test_prefix_root_one("/", "////foo", "/foo");
 366         test_prefix_root_one(NULL, "////foo", "/foo");
 367
 368         test_prefix_root_one("/foo", "/bar", "/foo/bar");
 369         test_prefix_root_one("/foo", "bar", "/foo/bar");
 370         test_prefix_root_one("foo", "bar", "foo/bar");
 371         test_prefix_root_one("/foo/", "/bar", "/foo/bar");
 372         test_prefix_root_one("/foo/", "//bar", "/foo/bar");
 373         test_prefix_root_one("/foo///", "//bar", "/foo/bar");
 374 }
 375
 376 static void test_path_is_mount_point(void) {
 377         int fd;
 378         char tmp_dir[] = "/tmp/test-path-is-mount-point-XXXXXX";
 379         _cleanup_free_ char *file1 = NULL, *file2 = NULL, *link1 = NULL, *link2 = NULL;
 380         _cleanup_free_ char *dir1 = NULL, *dir1file = NULL, *dirlink1 = NULL, *dirlink1file = NULL;
 381         _cleanup_free_ char *dir2 = NULL, *dir2file = NULL;
 382
 383         assert_se(path_is_mount_point("/", NULL, AT_SYMLINK_FOLLOW) > 0);
 384         assert_se(path_is_mount_point("/", NULL, 0) > 0);
 385
 386         assert_se(path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0);
 387         assert_se(path_is_mount_point("/proc", NULL, 0) > 0);
 388
 389         assert_se(path_is_mount_point("/proc/1", NULL, AT_SYMLINK_FOLLOW) == 0);
 390         assert_se(path_is_mount_point("/proc/1", NULL, 0) == 0);
 391
 392         assert_se(path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0);
 393         assert_se(path_is_mount_point("/sys", NULL, 0) > 0);
 394
 395         /* we'll create a hierarchy of different kinds of dir/file/link
 396          * layouts:
 397          *
 398          * <tmp>/file1, <tmp>/file2
 399          * <tmp>/link1 -> file1, <tmp>/link2 -> file2
 400          * <tmp>/dir1/
 401          * <tmp>/dir1/file
 402          * <tmp>/dirlink1 -> dir1
 403          * <tmp>/dirlink1file -> dirlink1/file
 404          * <tmp>/dir2/
 405          * <tmp>/dir2/file
 406          */
 407
 408         /* file mountpoints */
 409         assert_se(mkdtemp(tmp_dir) != NULL);
 410         file1 = path_join(NULL, tmp_dir, "file1");
 411         assert_se(file1);
 412         file2 = path_join(NULL, tmp_dir, "file2");
 413         assert_se(file2);
 414         fd = open(file1, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
 415         assert_se(fd > 0);
 416         close(fd);
 417         fd = open(file2, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
 418         assert_se(fd > 0);
 419         close(fd);
 420         link1 = path_join(NULL, tmp_dir, "link1");
 421         assert_se(link1);
 422         assert_se(symlink("file1", link1) == 0);
 423         link2 = path_join(NULL, tmp_dir, "link2");
 424         assert_se(link1);
 425         assert_se(symlink("file2", link2) == 0);
 426
 427         assert_se(path_is_mount_point(file1, NULL, AT_SYMLINK_FOLLOW) == 0);
 428         assert_se(path_is_mount_point(file1, NULL, 0) == 0);
 429         assert_se(path_is_mount_point(link1, NULL, AT_SYMLINK_FOLLOW) == 0);
 430         assert_se(path_is_mount_point(link1, NULL, 0) == 0);
 431
 432         /* directory mountpoints */
 433         dir1 = path_join(NULL, tmp_dir, "dir1");
 434         assert_se(dir1);
 435         assert_se(mkdir(dir1, 0755) == 0);
 436         dirlink1 = path_join(NULL, tmp_dir, "dirlink1");
 437         assert_se(dirlink1);
 438         assert_se(symlink("dir1", dirlink1) == 0);
 439         dirlink1file = path_join(NULL, tmp_dir, "dirlink1file");
 440         assert_se(dirlink1file);
 441         assert_se(symlink("dirlink1/file", dirlink1file) == 0);
 442         dir2 = path_join(NULL, tmp_dir, "dir2");
 443         assert_se(dir2);
 444         assert_se(mkdir(dir2, 0755) == 0);
 445
 446         assert_se(path_is_mount_point(dir1, NULL, AT_SYMLINK_FOLLOW) == 0);
 447         assert_se(path_is_mount_point(dir1, NULL, 0) == 0);
 448         assert_se(path_is_mount_point(dirlink1, NULL, AT_SYMLINK_FOLLOW) == 0);
 449         assert_se(path_is_mount_point(dirlink1, NULL, 0) == 0);
 450
 451         /* file in subdirectory mountpoints */
 452         dir1file = path_join(NULL, dir1, "file");
 453         assert_se(dir1file);
 454         fd = open(dir1file, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
 455         assert_se(fd > 0);
 456         close(fd);
 457
 458         assert_se(path_is_mount_point(dir1file, NULL, AT_SYMLINK_FOLLOW) == 0);
 459         assert_se(path_is_mount_point(dir1file, NULL, 0) == 0);
 460         assert_se(path_is_mount_point(dirlink1file, NULL, AT_SYMLINK_FOLLOW) == 0);
 461         assert_se(path_is_mount_point(dirlink1file, NULL, 0) == 0);
 462
 463         /* these tests will only work as root */
 464         if (mount(file1, file2, NULL, MS_BIND, NULL) >= 0) {
 465                 int rt, rf, rlt, rlf, rl1t, rl1f;
 466
 467                 /* files */
 468                 /* capture results in vars, to avoid dangling mounts on failure */
 469                 rf = path_is_mount_point(file2, NULL, 0);
 470                 rt = path_is_mount_point(file2, NULL, AT_SYMLINK_FOLLOW);
 471                 rlf = path_is_mount_point(link2, NULL, 0);
 472                 rlt = path_is_mount_point(link2, NULL, AT_SYMLINK_FOLLOW);
 473
 474                 assert_se(umount(file2) == 0);
 475
 476                 assert_se(rf == 1);
 477                 assert_se(rt == 1);
 478                 assert_se(rlf == 0);
 479                 assert_se(rlt == 1);
 480
 481                 /* dirs */
 482                 dir2file = path_join(NULL, dir2, "file");
 483                 assert_se(dir2file);
 484                 fd = open(dir2file, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
 485                 assert_se(fd > 0);
 486                 close(fd);
 487
 488                 assert_se(mount(dir2, dir1, NULL, MS_BIND, NULL) >= 0);
 489
 490                 rf = path_is_mount_point(dir1, NULL, 0);
 491                 rt = path_is_mount_point(dir1, NULL, AT_SYMLINK_FOLLOW);
 492                 rlf = path_is_mount_point(dirlink1, NULL, 0);
 493                 rlt = path_is_mount_point(dirlink1, NULL, AT_SYMLINK_FOLLOW);
 494                 /* its parent is a mount point, but not /file itself */
 495                 rl1f = path_is_mount_point(dirlink1file, NULL, 0);
 496                 rl1t = path_is_mount_point(dirlink1file, NULL, AT_SYMLINK_FOLLOW);
 497
 498                 assert_se(umount(dir1) == 0);
 499
 500                 assert_se(rf == 1);
 501                 assert_se(rt == 1);
 502                 assert_se(rlf == 0);
 503                 assert_se(rlt == 1);
 504                 assert_se(rl1f == 0);
 505                 assert_se(rl1t == 0);
 506
 507         } else
 508                 printf("Skipping bind mount file test: %m\n");
 509
 510         assert_se(rm_rf(tmp_dir, REMOVE_ROOT|REMOVE_PHYSICAL) == 0);
 511 }
 512
 513 static void test_file_in_same_dir(void) {
 514         char *t;
 515
 516         t = file_in_same_dir("/", "a");
 517         assert_se(streq(t, "/a"));
 518         free(t);
 519
 520         t = file_in_same_dir("/", "/a");
 521         assert_se(streq(t, "/a"));
 522         free(t);
 523
 524         t = file_in_same_dir("", "a");
 525         assert_se(streq(t, "a"));
 526         free(t);
 527
 528         t = file_in_same_dir("a/", "a");
 529         assert_se(streq(t, "a/a"));
 530         free(t);
 531
 532         t = file_in_same_dir("bar/foo", "bar");
 533         assert_se(streq(t, "bar/bar"));
 534         free(t);
 535 }
 536
 537 static void test_filename_is_valid(void) {
 538         char foo[FILENAME_MAX+2];
 539         int i;
 540
 541         assert_se(!filename_is_valid(""));
 542         assert_se(!filename_is_valid("/bar/foo"));
 543         assert_se(!filename_is_valid("/"));
 544         assert_se(!filename_is_valid("."));
 545         assert_se(!filename_is_valid(".."));
 546
 547         for (i=0; i<FILENAME_MAX+1; i++)
 548                 foo[i] = 'a';
 549         foo[FILENAME_MAX+1] = '\0';
 550
 551         assert_se(!filename_is_valid(foo));
 552
 553         assert_se(filename_is_valid("foo_bar-333"));
 554         assert_se(filename_is_valid("o.o"));
 555 }
 556
 557 static void test_hidden_or_backup_file(void) {
 558         assert_se(hidden_or_backup_file(".hidden"));
 559         assert_se(hidden_or_backup_file("..hidden"));
 560         assert_se(!hidden_or_backup_file("hidden."));
 561
 562         assert_se(hidden_or_backup_file("backup~"));
 563         assert_se(hidden_or_backup_file(".backup~"));
 564
 565         assert_se(hidden_or_backup_file("lost+found"));
 566         assert_se(hidden_or_backup_file("aquota.user"));
 567         assert_se(hidden_or_backup_file("aquota.group"));
 568
 569         assert_se(hidden_or_backup_file("test.rpmnew"));
 570         assert_se(hidden_or_backup_file("test.dpkg-old"));
 571         assert_se(hidden_or_backup_file("test.dpkg-remove"));
 572         assert_se(hidden_or_backup_file("test.swp"));
 573
 574         assert_se(!hidden_or_backup_file("test.rpmnew."));
 575         assert_se(!hidden_or_backup_file("test.dpkg-old.foo"));
 576 }
 577
 578 static void test_systemd_installation_has_version(const char *path) {
 579         int r;
 580         const unsigned versions[] = {0, 231, atoi(PACKAGE_VERSION), 999};
 581         unsigned i;
 582
 583         for (i = 0; i < ELEMENTSOF(versions); i++) {
 584                 r = systemd_installation_has_version(path, versions[i]);
 585                 assert_se(r >= 0);
 586                 log_info("%s has systemd >= %u: %s",
 587                          path ?: "Current installation", versions[i], yes_no(r));
 588         }
 589 }
 590
 591 static void test_skip_dev_prefix(void) {
 592
 593         assert_se(streq(skip_dev_prefix("/"), "/"));
 594         assert_se(streq(skip_dev_prefix("/dev"), ""));
 595         assert_se(streq(skip_dev_prefix("/dev/"), ""));
 596         assert_se(streq(skip_dev_prefix("/dev/foo"), "foo"));
 597         assert_se(streq(skip_dev_prefix("/dev/foo/bar"), "foo/bar"));
 598         assert_se(streq(skip_dev_prefix("//dev"), ""));
 599         assert_se(streq(skip_dev_prefix("//dev//"), ""));
 600         assert_se(streq(skip_dev_prefix("/dev///foo"), "foo"));
 601         assert_se(streq(skip_dev_prefix("///dev///foo///bar"), "foo///bar"));
 602         assert_se(streq(skip_dev_prefix("//foo"), "//foo"));
 603         assert_se(streq(skip_dev_prefix("foo"), "foo"));
 604 }
 605
 606 int main(int argc, char **argv) {
 607         log_set_max_level(LOG_DEBUG);
 608         log_parse_environment();
 609         log_open();
 610
 611         test_path();
 612         test_path_equal_root();
 613         test_find_binary(argv[0]);
 614         test_prefixes();
 615         test_path_join();
 616         test_fsck_exists();
 617         test_make_relative();
 618         test_strv_resolve();
 619         test_path_startswith();
 620         test_prefix_root();
 621         test_path_is_mount_point();
 622         test_file_in_same_dir();
 623         test_filename_is_valid();
 624         test_hidden_or_backup_file();
 625         test_skip_dev_prefix();
 626
 627         test_systemd_installation_has_version(argv[1]); /* NULL is OK */
 628
 629         return 0;
 630 }