src/test/test-stat-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.h>
   4 #include <linux/magic.h>
   5 #include <unistd.h>
   6
   7 #include "alloc-util.h"
   8 #include "fd-util.h"
   9 #include "macro.h"
  10 #include "missing.h"
  11 #include "mountpoint-util.h"
  12 #include "path-util.h"
  13 #include "stat-util.h"
  14 #include "tmpfile-util.h"
  15
  16 static void test_files_same(void) {
  17         _cleanup_close_ int fd = -1;
  18         char name[] = "/tmp/test-files_same.XXXXXX";
  19         char name_alias[] = "/tmp/test-files_same.alias";
  20
  21         fd = mkostemp_safe(name);
  22         assert_se(fd >= 0);
  23         assert_se(symlink(name, name_alias) >= 0);
  24
  25         assert_se(files_same(name, name, 0));
  26         assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
  27         assert_se(files_same(name, name_alias, 0));
  28         assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
  29
  30         unlink(name);
  31         unlink(name_alias);
  32 }
  33
  34 static void test_is_symlink(void) {
  35         char name[] = "/tmp/test-is_symlink.XXXXXX";
  36         char name_link[] = "/tmp/test-is_symlink.link";
  37         _cleanup_close_ int fd = -1;
  38
  39         fd = mkostemp_safe(name);
  40         assert_se(fd >= 0);
  41         assert_se(symlink(name, name_link) >= 0);
  42
  43         assert_se(is_symlink(name) == 0);
  44         assert_se(is_symlink(name_link) == 1);
  45         assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
  46
  47         unlink(name);
  48         unlink(name_link);
  49 }
  50
  51 static void test_path_is_fs_type(void) {
  52         /* run might not be a mount point in build chroots */
  53         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
  54                 assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
  55                 assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
  56         }
  57         assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
  58         assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
  59         assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
  60 }
  61
  62 static void test_path_is_temporary_fs(void) {
  63         /* run might not be a mount point in build chroots */
  64         if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
  65                 assert_se(path_is_temporary_fs("/run") > 0);
  66         assert_se(path_is_temporary_fs("/proc") == 0);
  67         assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
  68 }
  69
  70 static void test_fd_is_network_ns(void) {
  71         _cleanup_close_ int fd = -1;
  72         assert_se(fd_is_network_ns(STDIN_FILENO) == 0);
  73         assert_se(fd_is_network_ns(STDERR_FILENO) == 0);
  74         assert_se(fd_is_network_ns(STDOUT_FILENO) == 0);
  75
  76         assert_se((fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY)) >= 0);
  77         assert_se(IN_SET(fd_is_network_ns(fd), 0, -EUCLEAN));
  78         fd = safe_close(fd);
  79
  80         assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
  81         assert_se(IN_SET(fd_is_network_ns(fd), 1, -EUCLEAN));
  82 }
  83
  84 static void test_device_major_minor_valid(void) {
  85         /* on glibc dev_t is 64bit, even though in the kernel it is only 32bit */
  86         assert_cc(sizeof(dev_t) == sizeof(uint64_t));
  87
  88         assert_se(DEVICE_MAJOR_VALID(0U));
  89         assert_se(DEVICE_MINOR_VALID(0U));
  90
  91         assert_se(DEVICE_MAJOR_VALID(1U));
  92         assert_se(DEVICE_MINOR_VALID(1U));
  93
  94         assert_se(!DEVICE_MAJOR_VALID(-1U));
  95         assert_se(!DEVICE_MINOR_VALID(-1U));
  96
  97         assert_se(DEVICE_MAJOR_VALID(1U << 10));
  98         assert_se(DEVICE_MINOR_VALID(1U << 10));
  99
 100         assert_se(DEVICE_MAJOR_VALID((1U << 12) - 1));
 101         assert_se(DEVICE_MINOR_VALID((1U << 20) - 1));
 102
 103         assert_se(!DEVICE_MAJOR_VALID((1U << 12)));
 104         assert_se(!DEVICE_MINOR_VALID((1U << 20)));
 105
 106         assert_se(!DEVICE_MAJOR_VALID(1U << 25));
 107         assert_se(!DEVICE_MINOR_VALID(1U << 25));
 108
 109         assert_se(!DEVICE_MAJOR_VALID(UINT32_MAX));
 110         assert_se(!DEVICE_MINOR_VALID(UINT32_MAX));
 111
 112         assert_se(!DEVICE_MAJOR_VALID(UINT64_MAX));
 113         assert_se(!DEVICE_MINOR_VALID(UINT64_MAX));
 114
 115         assert_se(DEVICE_MAJOR_VALID(major(0)));
 116         assert_se(DEVICE_MINOR_VALID(minor(0)));
 117 }
 118
 119 static void test_device_path_make_canonical_one(const char *path) {
 120         _cleanup_free_ char *resolved = NULL, *raw = NULL;
 121         struct stat st;
 122         dev_t devno;
 123         mode_t mode;
 124         int r;
 125
 126         assert_se(stat(path, &st) >= 0);
 127         r = device_path_make_canonical(st.st_mode, st.st_rdev, &resolved);
 128         if (r == -ENOENT) /* maybe /dev/char/x:y and /dev/block/x:y are missing in this test environment, because we
 129                            * run in a container or so? */
 130                 return;
 131
 132         assert_se(r >= 0);
 133         assert_se(path_equal(path, resolved));
 134
 135         assert_se(device_path_make_major_minor(st.st_mode, st.st_rdev, &raw) >= 0);
 136         assert_se(device_path_parse_major_minor(raw, &mode, &devno) >= 0);
 137
 138         assert_se(st.st_rdev == devno);
 139         assert_se((st.st_mode & S_IFMT) == (mode & S_IFMT));
 140 }
 141
 142 static void test_device_path_make_canonical(void) {
 143
 144         test_device_path_make_canonical_one("/dev/null");
 145         test_device_path_make_canonical_one("/dev/zero");
 146         test_device_path_make_canonical_one("/dev/full");
 147         test_device_path_make_canonical_one("/dev/random");
 148         test_device_path_make_canonical_one("/dev/urandom");
 149         test_device_path_make_canonical_one("/dev/tty");
 150
 151         if (is_device_node("/run/systemd/inaccessible/chr") > 0) {
 152                 test_device_path_make_canonical_one("/run/systemd/inaccessible/chr");
 153                 test_device_path_make_canonical_one("/run/systemd/inaccessible/blk");
 154         }
 155 }
 156
 157 int main(int argc, char *argv[]) {
 158         test_files_same();
 159         test_is_symlink();
 160         test_path_is_fs_type();
 161         test_path_is_temporary_fs();
 162         test_fd_is_network_ns();
 163         test_device_major_minor_valid();
 164         test_device_path_make_canonical();
 165
 166         return 0;
 167 }