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(inode_same) {
  46         _cleanup_close_ int fd = -EBADF;
  47         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-files_same.XXXXXX";
  48         _cleanup_(unlink_tempfilep) 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(inode_same(name, name, 0));
  55         assert_se(inode_same(name, name, AT_SYMLINK_NOFOLLOW));
  56         assert_se(inode_same(name, name_alias, 0));
  57         assert_se(!inode_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
  58 }
  59
  60 TEST(is_symlink) {
  61         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-is_symlink.XXXXXX";
  62         _cleanup_(unlink_tempfilep) char name_link[] = "/tmp/test-is_symlink.link";
  63         _cleanup_close_ int fd = -EBADF;
  64
  65         fd = mkostemp_safe(name);
  66         assert_se(fd >= 0);
  67         assert_se(symlink(name, name_link) >= 0);
  68
  69         assert_se(is_symlink(name) == 0);
  70         assert_se(is_symlink(name_link) == 1);
  71         assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
  72 }
  73
  74 TEST(path_is_fs_type) {
  75         /* run might not be a mount point in build chroots */
  76         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
  77                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
  78                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
  79         }
  80         if (path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
  81                 assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
  82                 assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
  83         }
  84         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
  85 }
  86
  87 TEST(path_is_temporary_fs) {
  88         int r;
  89
  90         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
  91                 r = path_is_temporary_fs(s);
  92
  93                 log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
  94                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
  95         }
  96
  97         /* run might not be a mount point in build chroots */
  98         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
  99                 assert_se(path_is_temporary_fs("/run") > 0);
 100         assert_se(path_is_temporary_fs("/proc") == 0);
 101         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
 102 }
 103
 104 TEST(path_is_read_only_fs) {
 105         int r;
 106
 107         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
 108                 r = path_is_read_only_fs(s);
 109
 110                 log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
 111                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
 112         }
 113
 114         if (path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
 115                 assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
 116
 117         assert_se(path_is_read_only_fs("/proc") == 0);
 118         assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
 119 }
 120
 121 TEST(fd_is_ns) {
 122         _cleanup_close_ int fd = -EBADF;
 123
 124         assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
 125         assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
 126         assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
 127
 128         fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
 129         if (fd < 0) {
 130                 assert_se(errno == ENOENT);
 131                 log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
 132                 return;
 133         }
 134         assert_se(fd >= 0);
 135         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
 136         fd = safe_close(fd);
 137
 138         assert_se((fd = open("/proc/self/ns/ipc", O_CLOEXEC|O_RDONLY)) >= 0);
 139         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWIPC), 1, -EUCLEAN));
 140         fd = safe_close(fd);
 141
 142         assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
 143         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 1, -EUCLEAN));
 144 }
 145
 146 TEST(dir_is_empty) {
 147         _cleanup_(rm_rf_physical_and_freep) char *empty_dir = NULL;
 148         _cleanup_free_ char *j = NULL, *jj = NULL, *jjj = NULL;
 149
 150         assert_se(dir_is_empty_at(AT_FDCWD, "/proc", /* ignore_hidden_or_backup= */ true) == 0);
 151         assert_se(dir_is_empty_at(AT_FDCWD, "/icertainlydontexistdoi", /* ignore_hidden_or_backup= */ true) == -ENOENT);
 152
 153         assert_se(mkdtemp_malloc("/tmp/emptyXXXXXX", &empty_dir) >= 0);
 154         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 155
 156         j = path_join(empty_dir, "zzz");
 157         assert_se(j);
 158         assert_se(touch(j) >= 0);
 159
 160         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 161
 162         jj = path_join(empty_dir, "ppp");
 163         assert_se(jj);
 164         assert_se(touch(jj) >= 0);
 165
 166         jjj = path_join(empty_dir, ".qqq");
 167         assert_se(jjj);
 168         assert_se(touch(jjj) >= 0);
 169
 170         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 171         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 172         assert_se(unlink(j) >= 0);
 173         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 174         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 175         assert_se(unlink(jj) >= 0);
 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(jjj) >= 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 }
 182
 183 static int intro(void) {
 184         log_show_color(true);
 185         return EXIT_SUCCESS;
 186 }
 187
 188 DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);