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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <fcntl.h>
#include <linux/magic.h>
#include <unistd.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "macro.h"
#include "missing.h"
#include "mountpoint-util.h"
#include "path-util.h"
#include "stat-util.h"
#include "tmpfile-util.h"
static void test_files_same(void) {
_cleanup_close_ int fd = -1;
char name[] = "/tmp/test-files_same.XXXXXX";
char name_alias[] = "/tmp/test-files_same.alias";
fd = mkostemp_safe(name);
assert_se(fd >= 0);
assert_se(symlink(name, name_alias) >= 0);
assert_se(files_same(name, name, 0));
assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
assert_se(files_same(name, name_alias, 0));
assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
unlink(name);
unlink(name_alias);
}
static void test_is_symlink(void) {
char name[] = "/tmp/test-is_symlink.XXXXXX";
char name_link[] = "/tmp/test-is_symlink.link";
_cleanup_close_ int fd = -1;
fd = mkostemp_safe(name);
assert_se(fd >= 0);
assert_se(symlink(name, name_link) >= 0);
assert_se(is_symlink(name) == 0);
assert_se(is_symlink(name_link) == 1);
assert_se(is_symlink("/a/file/which/does/not/exist/i/guess") < 0);
unlink(name);
unlink(name_link);
}
static void test_path_is_fs_type(void) {
/* run might not be a mount point in build chroots */
if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0) {
assert_se(path_is_fs_type("/run", TMPFS_MAGIC) > 0);
assert_se(path_is_fs_type("/run", BTRFS_SUPER_MAGIC) == 0);
}
assert_se(path_is_fs_type("/proc", PROC_SUPER_MAGIC) > 0);
assert_se(path_is_fs_type("/proc", BTRFS_SUPER_MAGIC) == 0);
assert_se(path_is_fs_type("/i-dont-exist", BTRFS_SUPER_MAGIC) == -ENOENT);
}
static void test_path_is_temporary_fs(void) {
/* run might not be a mount point in build chroots */
if (path_is_mount_point("/run", NULL, AT_SYMLINK_FOLLOW) > 0)
assert_se(path_is_temporary_fs("/run") > 0);
assert_se(path_is_temporary_fs("/proc") == 0);
assert_se(path_is_temporary_fs("/i-dont-exist") == -ENOENT);
}
static void test_fd_is_network_ns(void) {
_cleanup_close_ int fd = -1;
assert_se(fd_is_network_ns(STDIN_FILENO) == 0);
assert_se(fd_is_network_ns(STDERR_FILENO) == 0);
assert_se(fd_is_network_ns(STDOUT_FILENO) == 0);
assert_se((fd = open("/proc/self/ns/mnt", O_CLOEXEC|O_RDONLY)) >= 0);
assert_se(IN_SET(fd_is_network_ns(fd), 0, -EUCLEAN));
fd = safe_close(fd);
assert_se((fd = open("/proc/self/ns/net", O_CLOEXEC|O_RDONLY)) >= 0);
assert_se(IN_SET(fd_is_network_ns(fd), 1, -EUCLEAN));
}
static void test_device_major_minor_valid(void) {
/* on glibc dev_t is 64bit, even though in the kernel it is only 32bit */
assert_cc(sizeof(dev_t) == sizeof(uint64_t));
assert_se(DEVICE_MAJOR_VALID(0U));
assert_se(DEVICE_MINOR_VALID(0U));
assert_se(DEVICE_MAJOR_VALID(1U));
assert_se(DEVICE_MINOR_VALID(1U));
assert_se(!DEVICE_MAJOR_VALID(-1U));
assert_se(!DEVICE_MINOR_VALID(-1U));
assert_se(DEVICE_MAJOR_VALID(1U << 10));
assert_se(DEVICE_MINOR_VALID(1U << 10));
assert_se(DEVICE_MAJOR_VALID((1U << 12) - 1));
assert_se(DEVICE_MINOR_VALID((1U << 20) - 1));
assert_se(!DEVICE_MAJOR_VALID((1U << 12)));
assert_se(!DEVICE_MINOR_VALID((1U << 20)));
assert_se(!DEVICE_MAJOR_VALID(1U << 25));
assert_se(!DEVICE_MINOR_VALID(1U << 25));
assert_se(!DEVICE_MAJOR_VALID(UINT32_MAX));
assert_se(!DEVICE_MINOR_VALID(UINT32_MAX));
assert_se(!DEVICE_MAJOR_VALID(UINT64_MAX));
assert_se(!DEVICE_MINOR_VALID(UINT64_MAX));
assert_se(DEVICE_MAJOR_VALID(major(0)));
assert_se(DEVICE_MINOR_VALID(minor(0)));
}
static void test_device_path_make_canonical_one(const char *path) {
_cleanup_free_ char *resolved = NULL, *raw = NULL;
struct stat st;
dev_t devno;
mode_t mode;
int r;
assert_se(stat(path, &st) >= 0);
r = device_path_make_canonical(st.st_mode, st.st_rdev, &resolved);
if (r == -ENOENT) /* maybe /dev/char/x:y and /dev/block/x:y are missing in this test environment, because we
* run in a container or so? */
return;
assert_se(r >= 0);
assert_se(path_equal(path, resolved));
assert_se(device_path_make_major_minor(st.st_mode, st.st_rdev, &raw) >= 0);
assert_se(device_path_parse_major_minor(raw, &mode, &devno) >= 0);
assert_se(st.st_rdev == devno);
assert_se((st.st_mode & S_IFMT) == (mode & S_IFMT));
}
static void test_device_path_make_canonical(void) {
test_device_path_make_canonical_one("/dev/null");
test_device_path_make_canonical_one("/dev/zero");
test_device_path_make_canonical_one("/dev/full");
test_device_path_make_canonical_one("/dev/random");
test_device_path_make_canonical_one("/dev/urandom");
test_device_path_make_canonical_one("/dev/tty");
if (is_device_node("/run/systemd/inaccessible/chr") > 0) {
test_device_path_make_canonical_one("/run/systemd/inaccessible/chr");
test_device_path_make_canonical_one("/run/systemd/inaccessible/blk");
}
}
int main(int argc, char *argv[]) {
test_files_same();
test_is_symlink();
test_path_is_fs_type();
test_path_is_temporary_fs();
test_fd_is_network_ns();
test_device_major_minor_valid();
test_device_path_make_canonical();
return 0;
}
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