#include "fileio.h"
#include "hashmap.h"
#include "log.h"
+#include "log.h"
#include "mount-util.h"
#include "path-util.h"
+#include "rm-rf.h"
#include "string-util.h"
static void test_mount_propagation_flags(const char *name, int ret, unsigned long expected) {
hashmap_free_free(h);
}
+static void test_path_is_mount_point(void) {
+ int fd;
+ char tmp_dir[] = "/tmp/test-path-is-mount-point-XXXXXX";
+ _cleanup_free_ char *file1 = NULL, *file2 = NULL, *link1 = NULL, *link2 = NULL;
+ _cleanup_free_ char *dir1 = NULL, *dir1file = NULL, *dirlink1 = NULL, *dirlink1file = NULL;
+ _cleanup_free_ char *dir2 = NULL, *dir2file = NULL;
+
+ assert_se(path_is_mount_point("/", NULL, AT_SYMLINK_FOLLOW) > 0);
+ assert_se(path_is_mount_point("/", NULL, 0) > 0);
+
+ assert_se(path_is_mount_point("/proc", NULL, AT_SYMLINK_FOLLOW) > 0);
+ assert_se(path_is_mount_point("/proc", NULL, 0) > 0);
+
+ assert_se(path_is_mount_point("/proc/1", NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point("/proc/1", NULL, 0) == 0);
+
+ assert_se(path_is_mount_point("/sys", NULL, AT_SYMLINK_FOLLOW) > 0);
+ assert_se(path_is_mount_point("/sys", NULL, 0) > 0);
+
+ /* we'll create a hierarchy of different kinds of dir/file/link
+ * layouts:
+ *
+ * <tmp>/file1, <tmp>/file2
+ * <tmp>/link1 -> file1, <tmp>/link2 -> file2
+ * <tmp>/dir1/
+ * <tmp>/dir1/file
+ * <tmp>/dirlink1 -> dir1
+ * <tmp>/dirlink1file -> dirlink1/file
+ * <tmp>/dir2/
+ * <tmp>/dir2/file
+ */
+
+ /* file mountpoints */
+ assert_se(mkdtemp(tmp_dir) != NULL);
+ file1 = path_join(NULL, tmp_dir, "file1");
+ assert_se(file1);
+ file2 = path_join(NULL, tmp_dir, "file2");
+ assert_se(file2);
+ fd = open(file1, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
+ assert_se(fd > 0);
+ close(fd);
+ fd = open(file2, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
+ assert_se(fd > 0);
+ close(fd);
+ link1 = path_join(NULL, tmp_dir, "link1");
+ assert_se(link1);
+ assert_se(symlink("file1", link1) == 0);
+ link2 = path_join(NULL, tmp_dir, "link2");
+ assert_se(link1);
+ assert_se(symlink("file2", link2) == 0);
+
+ assert_se(path_is_mount_point(file1, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(file1, NULL, 0) == 0);
+ assert_se(path_is_mount_point(link1, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(link1, NULL, 0) == 0);
+
+ /* directory mountpoints */
+ dir1 = path_join(NULL, tmp_dir, "dir1");
+ assert_se(dir1);
+ assert_se(mkdir(dir1, 0755) == 0);
+ dirlink1 = path_join(NULL, tmp_dir, "dirlink1");
+ assert_se(dirlink1);
+ assert_se(symlink("dir1", dirlink1) == 0);
+ dirlink1file = path_join(NULL, tmp_dir, "dirlink1file");
+ assert_se(dirlink1file);
+ assert_se(symlink("dirlink1/file", dirlink1file) == 0);
+ dir2 = path_join(NULL, tmp_dir, "dir2");
+ assert_se(dir2);
+ assert_se(mkdir(dir2, 0755) == 0);
+
+ assert_se(path_is_mount_point(dir1, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(dir1, NULL, 0) == 0);
+ assert_se(path_is_mount_point(dirlink1, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(dirlink1, NULL, 0) == 0);
+
+ /* file in subdirectory mountpoints */
+ dir1file = path_join(NULL, dir1, "file");
+ assert_se(dir1file);
+ fd = open(dir1file, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
+ assert_se(fd > 0);
+ close(fd);
+
+ assert_se(path_is_mount_point(dir1file, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(dir1file, NULL, 0) == 0);
+ assert_se(path_is_mount_point(dirlink1file, NULL, AT_SYMLINK_FOLLOW) == 0);
+ assert_se(path_is_mount_point(dirlink1file, NULL, 0) == 0);
+
+ /* these tests will only work as root */
+ if (mount(file1, file2, NULL, MS_BIND, NULL) >= 0) {
+ int rt, rf, rlt, rlf, rl1t, rl1f;
+
+ /* files */
+ /* capture results in vars, to avoid dangling mounts on failure */
+ rf = path_is_mount_point(file2, NULL, 0);
+ rt = path_is_mount_point(file2, NULL, AT_SYMLINK_FOLLOW);
+ rlf = path_is_mount_point(link2, NULL, 0);
+ rlt = path_is_mount_point(link2, NULL, AT_SYMLINK_FOLLOW);
+
+ assert_se(umount(file2) == 0);
+
+ assert_se(rf == 1);
+ assert_se(rt == 1);
+ assert_se(rlf == 0);
+ assert_se(rlt == 1);
+
+ /* dirs */
+ dir2file = path_join(NULL, dir2, "file");
+ assert_se(dir2file);
+ fd = open(dir2file, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC, 0664);
+ assert_se(fd > 0);
+ close(fd);
+
+ assert_se(mount(dir2, dir1, NULL, MS_BIND, NULL) >= 0);
+
+ rf = path_is_mount_point(dir1, NULL, 0);
+ rt = path_is_mount_point(dir1, NULL, AT_SYMLINK_FOLLOW);
+ rlf = path_is_mount_point(dirlink1, NULL, 0);
+ rlt = path_is_mount_point(dirlink1, NULL, AT_SYMLINK_FOLLOW);
+ /* its parent is a mount point, but not /file itself */
+ rl1f = path_is_mount_point(dirlink1file, NULL, 0);
+ rl1t = path_is_mount_point(dirlink1file, NULL, AT_SYMLINK_FOLLOW);
+
+ assert_se(umount(dir1) == 0);
+
+ assert_se(rf == 1);
+ assert_se(rt == 1);
+ assert_se(rlf == 0);
+ assert_se(rlt == 1);
+ assert_se(rl1f == 0);
+ assert_se(rl1t == 0);
+
+ } else
+ printf("Skipping bind mount file test: %m\n");
+
+ assert_se(rm_rf(tmp_dir, REMOVE_ROOT|REMOVE_PHYSICAL) == 0);
+}
+
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
test_mount_propagation_flags(" ", -EINVAL, 0);
test_mnt_id();
+ test_path_is_mount_point();
return 0;
}
projects / thirdparty / systemd.git / blobdiff