/*** This file is part of systemd. Copyright 2013 Zbigniew Jędrzejewski-Szmek systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdio.h> #include <sys/mount.h> #include <unistd.h> #include "alloc-util.h" #include "fd-util.h" #include "macro.h" #include "mount-util.h" #include "path-util.h" #include "rm-rf.h" #include "string-util.h" #include "strv.h" #include "util.h" #define test_path_compare(a, b, result) { \ assert_se(path_compare(a, b) == result); \ assert_se(path_compare(b, a) == -result); \ assert_se(path_equal(a, b) == !result); \ assert_se(path_equal(b, a) == !result); \ } static void test_path(void) { _cleanup_close_ int fd = -1; test_path_compare("/goo", "/goo", 0); test_path_compare("/goo", "/goo", 0); test_path_compare("//goo", "/goo", 0); test_path_compare("//goo/////", "/goo", 0); test_path_compare("goo/////", "goo", 0); test_path_compare("/goo/boo", "/goo//boo", 0); test_path_compare("//goo/boo", "/goo/boo//", 0); test_path_compare("/", "///", 0); test_path_compare("/x", "x/", 1); test_path_compare("x/", "/", -1); test_path_compare("/x/./y", "x/y", 1); test_path_compare("x/.y", "x/y", -1); test_path_compare("foo", "/foo", -1); test_path_compare("/foo", "/foo/bar", -1); test_path_compare("/foo/aaa", "/foo/b", -1); test_path_compare("/foo/aaa", "/foo/b/a", -1); test_path_compare("/foo/a", "/foo/aaa", -1); test_path_compare("/foo/a/b", "/foo/aaa", -1); assert_se(path_is_absolute("/")); assert_se(!path_is_absolute("./")); assert_se(is_path("/dir")); assert_se(is_path("a/b")); assert_se(!is_path(".")); assert_se(streq(basename("./aa/bb/../file.da."), "file.da.")); assert_se(streq(basename("/aa///.file"), ".file")); assert_se(streq(basename("/aa///file..."), "file...")); assert_se(streq(basename("file.../"), "")); fd = open("/", O_RDONLY|O_CLOEXEC|O_DIRECTORY|O_NOCTTY); assert_se(fd >= 0); assert_se(fd_is_mount_point(fd, "/", 0) > 0); { char p1[] = "aaa/bbb////ccc"; char p2[] = "//aaa/.////ccc"; char p3[] = "/./"; assert_se(path_equal(path_kill_slashes(p1), "aaa/bbb/ccc")); assert_se(path_equal(path_kill_slashes(p2), "/aaa/./ccc")); assert_se(path_equal(path_kill_slashes(p3), "/./")); } } static void test_find_binary(const char *self) { char *p; assert_se(find_binary("/bin/sh", &p) == 0); puts(p); assert_se(path_equal(p, "/bin/sh")); free(p); assert_se(find_binary(self, &p) == 0); puts(p); assert_se(endswith(p, "/test-path-util")); assert_se(path_is_absolute(p)); free(p); assert_se(find_binary("sh", &p) == 0); puts(p); assert_se(endswith(p, "/sh")); assert_se(path_is_absolute(p)); free(p); assert_se(find_binary("xxxx-xxxx", &p) == -ENOENT); assert_se(find_binary("/some/dir/xxxx-xxxx", &p) == -ENOENT); } static void test_prefixes(void) { static const char* values[] = { "/a/b/c/d", "/a/b/c", "/a/b", "/a", "", NULL}; unsigned i; char s[PATH_MAX]; bool b; i = 0; PATH_FOREACH_PREFIX_MORE(s, "/a/b/c/d") { log_error("---%s---", s); assert_se(streq(s, values[i++])); } assert_se(values[i] == NULL); i = 1; PATH_FOREACH_PREFIX(s, "/a/b/c/d") { log_error("---%s---", s); assert_se(streq(s, values[i++])); } assert_se(values[i] == NULL); i = 0; PATH_FOREACH_PREFIX_MORE(s, "////a////b////c///d///////") assert_se(streq(s, values[i++])); assert_se(values[i] == NULL); i = 1; PATH_FOREACH_PREFIX(s, "////a////b////c///d///////") assert_se(streq(s, values[i++])); assert_se(values[i] == NULL); PATH_FOREACH_PREFIX(s, "////") assert_not_reached("Wut?"); b = false; PATH_FOREACH_PREFIX_MORE(s, "////") { assert_se(!b); assert_se(streq(s, "")); b = true; } assert_se(b); PATH_FOREACH_PREFIX(s, "") assert_not_reached("wut?"); b = false; PATH_FOREACH_PREFIX_MORE(s, "") { assert_se(!b); assert_se(streq(s, "")); b = true; } } static void test_path_join(void) { #define test_join(root, path, rest, expected) { \ _cleanup_free_ char *z = NULL; \ z = path_join(root, path, rest); \ assert_se(streq(z, expected)); \ } test_join("/root", "/a/b", "/c", "/root/a/b/c"); test_join("/root", "a/b", "c", "/root/a/b/c"); test_join("/root", "/a/b", "c", "/root/a/b/c"); test_join("/root", "/", "c", "/root/c"); test_join("/root", "/", NULL, "/root/"); test_join(NULL, "/a/b", "/c", "/a/b/c"); test_join(NULL, "a/b", "c", "a/b/c"); test_join(NULL, "/a/b", "c", "/a/b/c"); test_join(NULL, "/", "c", "/c"); test_join(NULL, "/", NULL, "/"); } static void test_fsck_exists(void) { /* Ensure we use a sane default for PATH. */ unsetenv("PATH"); /* fsck.minix is provided by util-linux and will probably exist. */ assert_se(fsck_exists("minix") == 1); assert_se(fsck_exists("AbCdE") == 0); assert_se(fsck_exists("/../bin/") == 0); } static void test_make_relative(void) { char *result; assert_se(path_make_relative("some/relative/path", "/some/path", &result) < 0); assert_se(path_make_relative("/some/path", "some/relative/path", &result) < 0); #define test(from_dir, to_path, expected) { \ _cleanup_free_ char *z = NULL; \ path_make_relative(from_dir, to_path, &z); \ assert_se(streq(z, expected)); \ } test("/", "/", "."); test("/", "/some/path", "some/path"); test("/some/path", "/some/path", "."); test("/some/path", "/some/path/in/subdir", "in/subdir"); test("/some/path", "/", "../.."); test("/some/path", "/some/other/path", "../other/path"); test("//extra/////slashes///won't////fool///anybody//", "////extra///slashes////are/just///fine///", "../../../are/just/fine"); } static void test_strv_resolve(void) { char tmp_dir[] = "/tmp/test-path-util-XXXXXX"; _cleanup_strv_free_ char **search_dirs = NULL; _cleanup_strv_free_ char **absolute_dirs = NULL; char **d; assert_se(mkdtemp(tmp_dir) != NULL); search_dirs = strv_new("/dir1", "/dir2", "/dir3", NULL); assert_se(search_dirs); STRV_FOREACH(d, search_dirs) { char *p = strappend(tmp_dir, *d); assert_se(p); assert_se(strv_push(&absolute_dirs, p) == 0); } assert_se(mkdir(absolute_dirs[0], 0700) == 0); assert_se(mkdir(absolute_dirs[1], 0700) == 0); assert_se(symlink("dir2", absolute_dirs[2]) == 0); path_strv_resolve(search_dirs, tmp_dir); assert_se(streq(search_dirs[0], "/dir1")); assert_se(streq(search_dirs[1], "/dir2")); assert_se(streq(search_dirs[2], "/dir2")); assert_se(rm_rf(tmp_dir, REMOVE_ROOT|REMOVE_PHYSICAL) == 0); } static void test_path_startswith(void) { assert_se(path_startswith("/foo/bar/barfoo/", "/foo")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo/")); assert_se(path_startswith("/foo/bar/barfoo/", "/")); assert_se(path_startswith("/foo/bar/barfoo/", "////")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo//bar/////barfoo///")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo/bar/barfoo////")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo/bar///barfoo/")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo////bar/barfoo/")); assert_se(path_startswith("/foo/bar/barfoo/", "////foo/bar/barfoo/")); assert_se(path_startswith("/foo/bar/barfoo/", "/foo/bar/barfoo")); assert_se(!path_startswith("/foo/bar/barfoo/", "/foo/bar/barfooa/")); assert_se(!path_startswith("/foo/bar/barfoo/", "/foo/bar/barfooa")); assert_se(!path_startswith("/foo/bar/barfoo/", "")); assert_se(!path_startswith("/foo/bar/barfoo/", "/bar/foo")); assert_se(!path_startswith("/foo/bar/barfoo/", "/f/b/b/")); } static void test_prefix_root_one(const char *r, const char *p, const char *expected) { _cleanup_free_ char *s = NULL; const char *t; assert_se(s = prefix_root(r, p)); assert_se(streq_ptr(s, expected)); t = prefix_roota(r, p); assert_se(t); assert_se(streq_ptr(t, expected)); } static void test_prefix_root(void) { test_prefix_root_one("/", "/foo", "/foo"); test_prefix_root_one(NULL, "/foo", "/foo"); test_prefix_root_one("", "/foo", "/foo"); test_prefix_root_one("///", "/foo", "/foo"); test_prefix_root_one("/", "////foo", "/foo"); test_prefix_root_one(NULL, "////foo", "/foo"); test_prefix_root_one("/foo", "/bar", "/foo/bar"); test_prefix_root_one("/foo", "bar", "/foo/bar"); test_prefix_root_one("foo", "bar", "foo/bar"); test_prefix_root_one("/foo/", "/bar", "/foo/bar"); test_prefix_root_one("/foo/", "//bar", "/foo/bar"); test_prefix_root_one("/foo///", "//bar", "/foo/bar"); } 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("/", AT_SYMLINK_FOLLOW) > 0); assert_se(path_is_mount_point("/", 0) > 0); assert_se(path_is_mount_point("/proc", AT_SYMLINK_FOLLOW) > 0); assert_se(path_is_mount_point("/proc", 0) > 0); assert_se(path_is_mount_point("/proc/1", AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point("/proc/1", 0) == 0); assert_se(path_is_mount_point("/sys", AT_SYMLINK_FOLLOW) > 0); assert_se(path_is_mount_point("/sys", 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, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(file1, 0) == 0); assert_se(path_is_mount_point(link1, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(link1, 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, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(dir1, 0) == 0); assert_se(path_is_mount_point(dirlink1, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(dirlink1, 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, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(dir1file, 0) == 0); assert_se(path_is_mount_point(dirlink1file, AT_SYMLINK_FOLLOW) == 0); assert_se(path_is_mount_point(dirlink1file, 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, 0); rt = path_is_mount_point(file2, AT_SYMLINK_FOLLOW); rlf = path_is_mount_point(link2, 0); rlt = path_is_mount_point(link2, 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, 0); rt = path_is_mount_point(dir1, AT_SYMLINK_FOLLOW); rlf = path_is_mount_point(dirlink1, 0); rlt = path_is_mount_point(dirlink1, AT_SYMLINK_FOLLOW); /* its parent is a mount point, but not /file itself */ rl1f = path_is_mount_point(dirlink1file, 0); rl1t = path_is_mount_point(dirlink1file, 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) { test_path(); test_find_binary(argv[0]); test_prefixes(); test_path_join(); test_fsck_exists(); test_make_relative(); test_strv_resolve(); test_path_startswith(); test_prefix_root(); test_path_is_mount_point(); return 0; }