char** path_strv_resolve(char **l, const char *prefix);
char** path_strv_resolve_uniq(char **l, const char *prefix);
-int fd_is_mount_point(int fd, const char *filename, int flags);
-int path_is_mount_point(const char *path, int flags);
int path_is_read_only_fs(const char *path);
int path_is_os_tree(const char *path);