src/test/test-stat-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <fcntl.h>
   4 #include <linux/magic.h>
   5 #include <sched.h>
   6 #include <unistd.h>
   7
   8 #include "alloc-util.h"
   9 #include "errno-list.h"
  10 #include "fd-util.h"
  11 #include "fs-util.h"
  12 #include "macro.h"
  13 #include "mountpoint-util.h"
  14 #include "namespace-util.h"
  15 #include "path-util.h"
  16 #include "rm-rf.h"
  17 #include "stat-util.h"
  18 #include "tests.h"
  19 #include "tmpfile-util.h"
  20
  21 TEST(null_or_empty_path) {
  22         assert_se(null_or_empty_path("/dev/null") == 1);
  23         assert_se(null_or_empty_path("/dev/tty") == 1);  /* We assume that any character device is "empty", bleh. */
  24         assert_se(null_or_empty_path("../../../../../../../../../../../../../../../../../../../../dev/null") == 1);
  25         assert_se(null_or_empty_path("/proc/self/exe") == 0);
  26         assert_se(null_or_empty_path("/nosuchfileordir") == -ENOENT);
  27 }
  28
  29 TEST(null_or_empty_path_with_root) {
  30         assert_se(null_or_empty_path_with_root("/dev/null", NULL) == 1);
  31         assert_se(null_or_empty_path_with_root("/dev/null", "/") == 1);
  32         assert_se(null_or_empty_path_with_root("/dev/null", "/.././../") == 1);
  33         assert_se(null_or_empty_path_with_root("/dev/null", "/.././..") == 1);
  34         assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", NULL) == 1);
  35         assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", "/") == 1);
  36         assert_se(null_or_empty_path_with_root("/proc/self/exe", NULL) == 0);
  37         assert_se(null_or_empty_path_with_root("/proc/self/exe", "/") == 0);
  38         assert_se(null_or_empty_path_with_root("/nosuchfileordir", NULL) == -ENOENT);
  39         assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././../") == -ENOENT);
  40         assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././..") == -ENOENT);
  41         assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar") == 1);
  42         assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar/") == 1);
  43 }
  44
  45 TEST(files_same) {
  46         _cleanup_close_ int fd = -1;
  47         char name[] = "/tmp/test-files_same.XXXXXX";
  48         char name_alias[] = "/tmp/test-files_same.alias";
  49
  50         fd = mkostemp_safe(name);
  51         assert_se(fd >= 0);
  52         assert_se(symlink(name, name_alias) >= 0);
  53
  54         assert_se(files_same(name, name, 0));
  55         assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
  56         assert_se(files_same(name, name_alias, 0));
  57         assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
  58
  59         unlink(name);
  60         unlink(name_alias);
  61 }
  62
  63 TEST(is_symlink) {
  64         char name[] = "/tmp/test-is_symlink.XXXXXX";
  65         char name_link[] = "/tmp/test-is_symlink.link";
  66         _cleanup_close_ int fd = -1;
  67
  68         fd = mkostemp_safe(name);
  69         assert_se(fd >= 0);
  70         assert_se(symlink(name, name_link) >= 0);
  71
  72         assert_se(is_symlink(name) == 0);
  73         assert_se(is_symlink(name_link) == 1);
  74         assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
  75
  76         unlink(name);
  77         unlink(name_link);
  78 }
  79
  80 TEST(path_is_fs_type) {
  81         /* run might not be a mount point in build chroots */
  82         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
  83                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
  84                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
  85         }
  86         if (path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
  87                 assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
  88                 assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
  89         }
  90         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
  91 }
  92
  93 TEST(path_is_temporary_fs) {
  94         int r;
  95
  96         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
  97                 r = path_is_temporary_fs(s);
  98
  99                 log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
 100                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
 101         }
 102
 103         /* run might not be a mount point in build chroots */
 104         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
 105                 assert_se(path_is_temporary_fs("/run") > 0);
 106         assert_se(path_is_temporary_fs("/proc") == 0);
 107         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
 108 }
 109
 110 TEST(path_is_read_only_fs) {
 111         int r;
 112
 113         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
 114                 r = path_is_read_only_fs(s);
 115
 116                 log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
 117                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
 118         }
 119
 120         if (path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
 121                 assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
 122
 123         assert_se(path_is_read_only_fs("/proc") == 0);
 124         assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
 125 }
 126
 127 TEST(fd_is_ns) {
 128         _cleanup_close_ int fd = -1;
 129
 130         assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
 131         assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
 132         assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
 133
 134         fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
 135         if (fd < 0) {
 136                 assert_se(errno == ENOENT);
 137                 log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
 138                 return;
 139         }
 140         assert_se(fd >= 0);
 141         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
 142         fd = safe_close(fd);
 143
 144         assert_se((fd = open("/proc/self/ns/ipc", O_CLOEXEC|O_RDONLY)) >= 0);
 145         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWIPC), 1, -EUCLEAN));
 146         fd = safe_close(fd);
 147
 148         assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
 149         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 1, -EUCLEAN));
 150 }
 151
 152 TEST(dir_is_empty) {
 153         _cleanup_(rm_rf_physical_and_freep) char *empty_dir = NULL;
 154         _cleanup_free_ char *j = NULL, *jj = NULL, *jjj = NULL;
 155
 156         assert_se(dir_is_empty_at(AT_FDCWD, "/proc", /* ignore_hidden_or_backup= */ true) == 0);
 157         assert_se(dir_is_empty_at(AT_FDCWD, "/icertainlydontexistdoi", /* ignore_hidden_or_backup= */ true) == -ENOENT);
 158
 159         assert_se(mkdtemp_malloc("/tmp/emptyXXXXXX", &empty_dir) >= 0);
 160         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 161
 162         j = path_join(empty_dir, "zzz");
 163         assert_se(j);
 164         assert_se(touch(j) >= 0);
 165
 166         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 167
 168         jj = path_join(empty_dir, "ppp");
 169         assert_se(jj);
 170         assert_se(touch(jj) >= 0);
 171
 172         jjj = path_join(empty_dir, ".qqq");
 173         assert_se(jjj);
 174         assert_se(touch(jjj) >= 0);
 175
 176         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 177         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 178         assert_se(unlink(j) >= 0);
 179         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 180         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 181         assert_se(unlink(jj) >= 0);
 182         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 183         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 184         assert_se(unlink(jjj) >= 0);
 185         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 186         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) > 0);
 187 }
 188
 189 static int intro(void) {
 190         log_show_color(true);
 191         return EXIT_SUCCESS;
 192 }
 193
 194 DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);