| /* |
| * Copyright (c) 2014 Fujitsu Ltd. |
| * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * |
| */ |
| /* |
| * Test Description: |
| * Verify that, |
| * 1. link() fails with -1 return value and sets errno to EPERM |
| * if oldpath is a directory. |
| * 2. link() fails with -1 return value and sets errno to EXDEV |
| * if oldpath and newpath are not on the same mounted file system( Linux |
| * permits a file system to be mounted at multiple points, but link() |
| * does not work across different mount points, even if the same |
| * file system is mounted on both. ). |
| * 3. link() fails with -1 return value and sets errno to EROFS |
| * if the file is on a read-only file system. |
| * 4. link() fails with -1 return value and sets errno to ELOOP |
| * if too many symbolic links were encountered in resolving path. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <pwd.h> |
| #include <sys/mount.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \ |
| S_IXGRP|S_IROTH|S_IXOTH) |
| #define MNT_POINT "mntpoint" |
| #define TEST_FILE "testfile" |
| #define TEST_FILE1 "testfile1" |
| #define TEST_FILE2 "mntpoint/testfile3" |
| #define TEST_FILE3 "mntpoint/testfile4" |
| |
| static char test_file4[PATH_MAX] = "."; |
| static void setup(void); |
| static void cleanup(void); |
| |
| static const char *device; |
| static int mount_flag; |
| |
| static struct test_case_t { |
| char *oldpath; |
| char *newpath; |
| int exp_errno; |
| } test_cases[] = { |
| {TEST_FILE1, TEST_FILE, EPERM}, |
| {TEST_FILE2, TEST_FILE, EXDEV}, |
| {TEST_FILE2, TEST_FILE3, EROFS}, |
| {test_file4, TEST_FILE, ELOOP}, |
| }; |
| |
| static void link_verify(const struct test_case_t *); |
| |
| char *TCID = "link08"; |
| int TST_TOTAL = ARRAY_SIZE(test_cases); |
| |
| int main(int ac, char **av) |
| { |
| int i, lc; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| for (i = 0; i < TST_TOTAL; i++) |
| link_verify(&test_cases[i]); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| static void link_verify(const struct test_case_t *tc) |
| { |
| TEST(link(tc->oldpath, tc->newpath)); |
| |
| if (TEST_RETURN != -1) { |
| tst_resm(TFAIL, "link succeeded unexpectedly"); |
| return; |
| } |
| |
| if (TEST_ERRNO == tc->exp_errno) { |
| tst_resm(TPASS | TTERRNO, "link failed as expected"); |
| } else { |
| tst_resm(TFAIL | TTERRNO, |
| "link failed unexpectedly; expected: %d - %s", |
| tc->exp_errno, strerror(tc->exp_errno)); |
| } |
| } |
| |
| |
| static void setup(void) |
| { |
| int i; |
| const char *fs_type; |
| |
| tst_require_root(); |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| fs_type = tst_dev_fs_type(); |
| device = tst_acquire_device(cleanup); |
| |
| if (!device) |
| tst_brkm(TCONF, cleanup, "Failed to acquire device"); |
| |
| SAFE_MKDIR(cleanup, TEST_FILE1, DIR_MODE); |
| |
| SAFE_MKDIR(cleanup, "test_eloop", DIR_MODE); |
| SAFE_SYMLINK(cleanup, "../test_eloop", "test_eloop/test_eloop"); |
| for (i = 0; i < 43; i++) |
| strcat(test_file4, "/test_eloop"); |
| |
| tst_mkfs(cleanup, device, fs_type, NULL, NULL); |
| SAFE_MKDIR(cleanup, MNT_POINT, DIR_MODE); |
| if (mount(device, MNT_POINT, fs_type, 0, NULL) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "mount device:%s failed", device); |
| } |
| mount_flag = 1; |
| |
| SAFE_TOUCH(cleanup, TEST_FILE2, 0644, NULL); |
| if (mount(device, MNT_POINT, fs_type, |
| MS_REMOUNT | MS_RDONLY, NULL) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "mount device:%s failed", device); |
| } |
| } |
| |
| static void cleanup(void) |
| { |
| if (mount_flag && tst_umount(MNT_POINT) < 0) |
| tst_resm(TWARN | TERRNO, "umount device:%s failed", device); |
| |
| if (device) |
| tst_release_device(device); |
| |
| tst_rmdir(); |
| } |