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 <sys/eventfd.h>
   7 #include <unistd.h>
   8
   9 #include "alloc-util.h"
  10 #include "errno-list.h"
  11 #include "fd-util.h"
  12 #include "fs-util.h"
  13 #include "macro.h"
  14 #include "mountpoint-util.h"
  15 #include "namespace-util.h"
  16 #include "path-util.h"
  17 #include "rm-rf.h"
  18 #include "stat-util.h"
  19 #include "tests.h"
  20 #include "tmpfile-util.h"
  21
  22 TEST(null_or_empty_path) {
  23         assert_se(null_or_empty_path("/dev/null") == 1);
  24         assert_se(null_or_empty_path("/dev/tty") == 1);  /* We assume that any character device is "empty", bleh. */
  25         assert_se(null_or_empty_path("../../../../../../../../../../../../../../../../../../../../dev/null") == 1);
  26         assert_se(null_or_empty_path("/proc/self/exe") == 0);
  27         assert_se(null_or_empty_path("/nosuchfileordir") == -ENOENT);
  28 }
  29
  30 TEST(null_or_empty_path_with_root) {
  31         assert_se(null_or_empty_path_with_root("/dev/null", 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", "/.././..") == 1);
  35         assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", NULL) == 1);
  36         assert_se(null_or_empty_path_with_root("../../../../../../../../../../../../../../../../../../../../dev/null", "/") == 1);
  37         assert_se(null_or_empty_path_with_root("/proc/self/exe", NULL) == 0);
  38         assert_se(null_or_empty_path_with_root("/proc/self/exe", "/") == 0);
  39         assert_se(null_or_empty_path_with_root("/nosuchfileordir", NULL) == -ENOENT);
  40         assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././../") == -ENOENT);
  41         assert_se(null_or_empty_path_with_root("/nosuchfileordir", "/.././..") == -ENOENT);
  42         assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar") == 1);
  43         assert_se(null_or_empty_path_with_root("/foobar/barbar/dev/null", "/foobar/barbar/") == 1);
  44 }
  45
  46 TEST(inode_same) {
  47         _cleanup_close_ int fd = -EBADF;
  48         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-files_same.XXXXXX";
  49         _cleanup_(unlink_tempfilep) char name_alias[] = "/tmp/test-files_same.alias";
  50
  51         fd = mkostemp_safe(name);
  52         assert_se(fd >= 0);
  53         assert_se(symlink(name, name_alias) >= 0);
  54
  55         assert_se(inode_same(name, name, 0));
  56         assert_se(inode_same(name, name, AT_SYMLINK_NOFOLLOW));
  57         assert_se(inode_same(name, name_alias, 0));
  58         assert_se(!inode_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
  59 }
  60
  61 TEST(is_symlink) {
  62         _cleanup_(unlink_tempfilep) char name[] = "/tmp/test-is_symlink.XXXXXX";
  63         _cleanup_(unlink_tempfilep) char name_link[] = "/tmp/test-is_symlink.link";
  64         _cleanup_close_ int fd = -EBADF;
  65
  66         fd = mkostemp_safe(name);
  67         assert_se(fd >= 0);
  68         assert_se(symlink(name, name_link) >= 0);
  69
  70         assert_se(is_symlink(name) == 0);
  71         assert_se(is_symlink(name_link) == 1);
  72         assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
  73 }
  74
  75 TEST(path_is_fs_type) {
  76         /* run might not be a mount point in build chroots */
  77         if (path_is_mount_point_full("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
  78                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
  79                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
  80         }
  81         if (path_is_mount_point_full("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
  82                 assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
  83                 assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
  84         }
  85         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
  86 }
  87
  88 TEST(path_is_temporary_fs) {
  89         int r;
  90
  91         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
  92                 r = path_is_temporary_fs(s);
  93
  94                 log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
  95                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
  96         }
  97
  98         /* run might not be a mount point in build chroots */
  99         if (path_is_mount_point_full("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
 100                 assert_se(path_is_temporary_fs("/run") > 0);
 101         assert_se(path_is_temporary_fs("/proc") == 0);
 102         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
 103 }
 104
 105 TEST(path_is_read_only_fs) {
 106         int r;
 107
 108         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
 109                 r = path_is_read_only_fs(s);
 110
 111                 log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
 112                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
 113         }
 114
 115         if (path_is_mount_point_full("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
 116                 assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
 117
 118         assert_se(path_is_read_only_fs("/proc") == 0);
 119         assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
 120 }
 121
 122 TEST(fd_is_ns) {
 123         _cleanup_close_ int fd = -EBADF;
 124
 125         assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
 126         assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
 127         assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
 128
 129         fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
 130         if (fd < 0) {
 131                 assert_se(errno == ENOENT);
 132                 log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
 133                 return;
 134         }
 135         assert_se(fd >= 0);
 136         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
 137         fd = safe_close(fd);
 138
 139         assert_se((fd = open("/proc/self/ns/ipc", O_CLOEXEC|O_RDONLY)) >= 0);
 140         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWIPC), 1, -EUCLEAN));
 141         fd = safe_close(fd);
 142
 143         assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
 144         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 1, -EUCLEAN));
 145 }
 146
 147 TEST(dir_is_empty) {
 148         _cleanup_(rm_rf_physical_and_freep) char *empty_dir = NULL;
 149         _cleanup_free_ char *j = NULL, *jj = NULL, *jjj = NULL;
 150
 151         assert_se(dir_is_empty_at(AT_FDCWD, "/proc", /* ignore_hidden_or_backup= */ true) == 0);
 152         assert_se(dir_is_empty_at(AT_FDCWD, "/icertainlydontexistdoi", /* ignore_hidden_or_backup= */ true) == -ENOENT);
 153
 154         assert_se(mkdtemp_malloc("/tmp/emptyXXXXXX", &empty_dir) >= 0);
 155         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 156
 157         j = path_join(empty_dir, "zzz");
 158         assert_se(j);
 159         assert_se(touch(j) >= 0);
 160
 161         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 162
 163         jj = path_join(empty_dir, "ppp");
 164         assert_se(jj);
 165         assert_se(touch(jj) >= 0);
 166
 167         jjj = path_join(empty_dir, ".qqq");
 168         assert_se(jjj);
 169         assert_se(touch(jjj) >= 0);
 170
 171         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 172         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 173         assert_se(unlink(j) >= 0);
 174         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) == 0);
 175         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 176         assert_se(unlink(jj) >= 0);
 177         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 178         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) == 0);
 179         assert_se(unlink(jjj) >= 0);
 180         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ true) > 0);
 181         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir, /* ignore_hidden_or_backup= */ false) > 0);
 182 }
 183
 184 TEST(inode_type_from_string) {
 185         static const mode_t types[] = {
 186                 S_IFREG,
 187                 S_IFDIR,
 188                 S_IFLNK,
 189                 S_IFCHR,
 190                 S_IFBLK,
 191                 S_IFIFO,
 192                 S_IFSOCK,
 193         };
 194
 195         FOREACH_ELEMENT(m, types)
 196                 assert_se(inode_type_from_string(inode_type_to_string(*m)) == *m);
 197 }
 198
 199 TEST(anonymous_inode) {
 200         _cleanup_close_ int fd = -EBADF;
 201
 202         fd = eventfd(0, EFD_CLOEXEC);
 203         assert_se(fd >= 0);
 204
 205         /* Verify that we handle anonymous inodes correctly, i.e. those which have no file type */
 206
 207         struct stat st;
 208         ASSERT_OK_ERRNO(fstat(fd, &st));
 209         assert_se((st.st_mode & S_IFMT) == 0);
 210
 211         assert_se(!inode_type_to_string(st.st_mode));
 212 }
 213
 214 TEST(fd_verify_linked) {
 215         _cleanup_(rm_rf_physical_and_freep) char *t = NULL;
 216         _cleanup_close_ int tfd = -EBADF, fd = -EBADF;
 217         _cleanup_free_ char *p = NULL;
 218
 219         tfd = mkdtemp_open(NULL, O_PATH, &t);
 220         assert_se(tfd >= 0);
 221
 222         assert_se(p = path_join(t, "hoge"));
 223         assert_se(touch(p) >= 0);
 224
 225         fd = open(p, O_CLOEXEC | O_PATH);
 226         assert_se(fd >= 0);
 227
 228         assert_se(fd_verify_linked(fd) >= 0);
 229         assert_se(unlinkat(tfd, "hoge", 0) >= 0);
 230         assert_se(fd_verify_linked(fd) == -EIDRM);
 231 }
 232
 233 static int intro(void) {
 234         log_show_color(true);
 235         return EXIT_SUCCESS;
 236 }
 237
 238 DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro);