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(files_same) {
  22         _cleanup_close_ int fd = -1;
  23         char name[] = "/tmp/test-files_same.XXXXXX";
  24         char name_alias[] = "/tmp/test-files_same.alias";
  25
  26         fd = mkostemp_safe(name);
  27         assert_se(fd >= 0);
  28         assert_se(symlink(name, name_alias) >= 0);
  29
  30         assert_se(files_same(name, name, 0));
  31         assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
  32         assert_se(files_same(name, name_alias, 0));
  33         assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
  34
  35         unlink(name);
  36         unlink(name_alias);
  37 }
  38
  39 TEST(is_symlink) {
  40         char name[] = "/tmp/test-is_symlink.XXXXXX";
  41         char name_link[] = "/tmp/test-is_symlink.link";
  42         _cleanup_close_ int fd = -1;
  43
  44         fd = mkostemp_safe(name);
  45         assert_se(fd >= 0);
  46         assert_se(symlink(name, name_link) >= 0);
  47
  48         assert_se(is_symlink(name) == 0);
  49         assert_se(is_symlink(name_link) == 1);
  50         assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
  51
  52         unlink(name);
  53         unlink(name_link);
  54 }
  55
  56 TEST(path_is_fs_type) {
  57         /* run might not be a mount point in build chroots */
  58         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
  59                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
  60                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
  61         }
  62         if (path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0) {
  63                 assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
  64                 assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
  65         }
  66         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
  67 }
  68
  69 TEST(path_is_temporary_fs) {
  70         const char *s;
  71         int r;
  72
  73         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
  74                 r = path_is_temporary_fs(s);
  75
  76                 log_info_errno(r, "path_is_temporary_fs(\"%s\"): %d, %s",
  77                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
  78         }
  79
  80         /* run might not be a mount point in build chroots */
  81         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
  82                 assert_se(path_is_temporary_fs("/run") > 0);
  83         assert_se(path_is_temporary_fs("/proc") == 0);
  84         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
  85 }
  86
  87 TEST(path_is_read_only_fs) {
  88         const char *s;
  89         int r;
  90
  91         FOREACH_STRING(s, "/", "/run", "/sys", "/sys/", "/proc", "/i-dont-exist", "/var", "/var/lib") {
  92                 r = path_is_read_only_fs(s);
  93
  94                 log_info_errno(r, "path_is_read_only_fs(\"%s\"): %d, %s",
  95                                s, r, r < 0 ? errno_to_name(r) : yes_no(r));
  96         }
  97
  98         if (path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0)
  99                 assert_se(IN_SET(path_is_read_only_fs("/sys"), 0, 1));
 100
 101         assert_se(path_is_read_only_fs("/proc") == 0);
 102         assert_se(path_is_read_only_fs("/i-dont-exist") == -ENOENT);
 103 }
 104
 105 TEST(fd_is_ns) {
 106         _cleanup_close_ int fd = -1;
 107
 108         assert_se(fd_is_ns(STDIN_FILENO, CLONE_NEWNET) == 0);
 109         assert_se(fd_is_ns(STDERR_FILENO, CLONE_NEWNET) == 0);
 110         assert_se(fd_is_ns(STDOUT_FILENO, CLONE_NEWNET) == 0);
 111
 112         fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY);
 113         if (fd < 0) {
 114                 assert_se(errno == ENOENT);
 115                 log_notice("Path %s not found, skipping test", "/proc/self/ns/mnt");
 116                 return;
 117         }
 118         assert_se(fd >= 0);
 119         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 0, -EUCLEAN));
 120         fd = safe_close(fd);
 121
 122         assert_se((fd = open("/proc/self/ns/ipc", O_CLOEXEC|O_RDONLY)) >= 0);
 123         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWIPC), 1, -EUCLEAN));
 124         fd = safe_close(fd);
 125
 126         assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
 127         assert_se(IN_SET(fd_is_ns(fd, CLONE_NEWNET), 1, -EUCLEAN));
 128 }
 129
 130 TEST(device_major_minor_valid) {
 131         /* on glibc dev_t is 64bit, even though in the kernel it is only 32bit */
 132         assert_cc(sizeof(dev_t) == sizeof(uint64_t));
 133
 134         assert_se(DEVICE_MAJOR_VALID(0U));
 135         assert_se(DEVICE_MINOR_VALID(0U));
 136
 137         assert_se(DEVICE_MAJOR_VALID(1U));
 138         assert_se(DEVICE_MINOR_VALID(1U));
 139
 140         assert_se(!DEVICE_MAJOR_VALID(-1U));
 141         assert_se(!DEVICE_MINOR_VALID(-1U));
 142
 143         assert_se(DEVICE_MAJOR_VALID(1U << 10));
 144         assert_se(DEVICE_MINOR_VALID(1U << 10));
 145
 146         assert_se(DEVICE_MAJOR_VALID((1U << 12) - 1));
 147         assert_se(DEVICE_MINOR_VALID((1U << 20) - 1));
 148
 149         assert_se(!DEVICE_MAJOR_VALID((1U << 12)));
 150         assert_se(!DEVICE_MINOR_VALID((1U << 20)));
 151
 152         assert_se(!DEVICE_MAJOR_VALID(1U << 25));
 153         assert_se(!DEVICE_MINOR_VALID(1U << 25));
 154
 155         assert_se(!DEVICE_MAJOR_VALID(UINT32_MAX));
 156         assert_se(!DEVICE_MINOR_VALID(UINT32_MAX));
 157
 158         assert_se(!DEVICE_MAJOR_VALID(UINT64_MAX));
 159         assert_se(!DEVICE_MINOR_VALID(UINT64_MAX));
 160
 161         assert_se(DEVICE_MAJOR_VALID(major(0)));
 162         assert_se(DEVICE_MINOR_VALID(minor(0)));
 163 }
 164
 165 static void test_device_path_make_canonical_one(const char *path) {
 166         _cleanup_free_ char *resolved = NULL, *raw = NULL;
 167         struct stat st;
 168         dev_t devno;
 169         mode_t mode;
 170         int r;
 171
 172         log_debug("> %s", path);
 173
 174         if (stat(path, &st) < 0) {
 175                 assert_se(errno == ENOENT);
 176                 log_notice("Path %s not found, skipping test", path);
 177                 return;
 178         }
 179
 180         r = device_path_make_canonical(st.st_mode, st.st_rdev, &resolved);
 181         if (r == -ENOENT) {
 182                 /* maybe /dev/char/x:y and /dev/block/x:y are missing in this test environment, because we
 183                  * run in a container or so? */
 184                 log_notice("Device %s cannot be resolved, skipping test", path);
 185                 return;
 186         }
 187
 188         assert_se(r >= 0);
 189         assert_se(path_equal(path, resolved));
 190
 191         assert_se(device_path_make_major_minor(st.st_mode, st.st_rdev, &raw) >= 0);
 192         assert_se(device_path_parse_major_minor(raw, &mode, &devno) >= 0);
 193
 194         assert_se(st.st_rdev == devno);
 195         assert_se((st.st_mode & S_IFMT) == (mode & S_IFMT));
 196 }
 197
 198 TEST(device_path_make_canonical) {
 199         test_device_path_make_canonical_one("/dev/null");
 200         test_device_path_make_canonical_one("/dev/zero");
 201         test_device_path_make_canonical_one("/dev/full");
 202         test_device_path_make_canonical_one("/dev/random");
 203         test_device_path_make_canonical_one("/dev/urandom");
 204         test_device_path_make_canonical_one("/dev/tty");
 205
 206         if (is_device_node("/run/systemd/inaccessible/blk") > 0) {
 207                 test_device_path_make_canonical_one("/run/systemd/inaccessible/chr");
 208                 test_device_path_make_canonical_one("/run/systemd/inaccessible/blk");
 209         }
 210 }
 211
 212 TEST(dir_is_empty) {
 213         _cleanup_(rm_rf_physical_and_freep) char *empty_dir = NULL;
 214         _cleanup_free_ char *j = NULL, *jj = NULL;
 215
 216         assert_se(dir_is_empty_at(AT_FDCWD, "/proc") == 0);
 217         assert_se(dir_is_empty_at(AT_FDCWD, "/icertainlydontexistdoi") == -ENOENT);
 218
 219         assert_se(mkdtemp_malloc("/tmp/emptyXXXXXX", &empty_dir) >= 0);
 220         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir) > 0);
 221
 222         j = path_join(empty_dir, "zzz");
 223         assert_se(j);
 224         assert_se(touch(j) >= 0);
 225
 226         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir) == 0);
 227
 228         jj = path_join(empty_dir, "ppp");
 229         assert_se(jj);
 230         assert_se(touch(jj) >= 0);
 231
 232         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir) == 0);
 233         assert_se(unlink(j) >= 0);
 234         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir) == 0);
 235         assert_se(unlink(jj) >= 0);
 236         assert_se(dir_is_empty_at(AT_FDCWD, empty_dir) > 0);
 237 }
 238
 239 DEFINE_CUSTOM_TEST_MAIN(LOG_INFO, log_show_color(true), /* no outro */);