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88 lines
2.2 KiB
88 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2014 Fujitsu Ltd.
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* Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
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*/
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/*
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* Test Description:
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* Verify that,
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* 1. link() fails with -1 return value and sets errno to EPERM
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* if oldpath is a directory.
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* 2. link() fails with -1 return value and sets errno to EXDEV
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* if oldpath and newpath are not on the same mounted file system( Linux
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* permits a file system to be mounted at multiple points, but link()
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* does not work across different mount points, even if the same
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* file system is mounted on both. ).
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* 3. link() fails with -1 return value and sets errno to EROFS
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* if the file is on a read-only file system.
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* 4. link() fails with -1 return value and sets errno to ELOOP
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* if too many symbolic links were encountered in resolving path.
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*/
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#include <errno.h>
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#include "tst_test.h"
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#define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \
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S_IXGRP|S_IROTH|S_IXOTH)
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#define MNT_POINT "mntpoint"
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#define TEST_FILE "testfile"
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#define TEST_FILE1 "testfile1"
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#define TEST_FILE2 "mntpoint/file"
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#define TEST_FILE3 "mntpoint/testfile4"
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static char test_file4[PATH_MAX] = ".";
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static void setup(void);
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static struct tcase {
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char *oldpath;
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char *newpath;
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int exp_errno;
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} tcases[] = {
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{TEST_FILE1, TEST_FILE, EPERM},
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{TEST_FILE2, TEST_FILE, EXDEV},
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{TEST_FILE2, TEST_FILE3, EROFS},
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{test_file4, TEST_FILE, ELOOP},
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};
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static void link_verify(unsigned int i)
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{
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struct tcase *tc = &tcases[i];
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TEST(link(tc->oldpath, tc->newpath));
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if (TST_RET != -1) {
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tst_res(TFAIL, "link() succeeded unexpectedly (%li)",
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TST_RET);
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return;
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}
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if (TST_ERR == tc->exp_errno) {
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tst_res(TPASS | TTERRNO, "link() failed as expected");
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return;
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}
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tst_res(TFAIL | TTERRNO,
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"link() failed unexpectedly; expected: %d - %s",
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tc->exp_errno, tst_strerrno(tc->exp_errno));
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}
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static void setup(void)
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{
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int i;
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SAFE_MKDIR(TEST_FILE1, DIR_MODE);
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SAFE_MKDIR("test_eloop", DIR_MODE);
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SAFE_SYMLINK("../test_eloop", "test_eloop/test_eloop");
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for (i = 0; i < 43; i++)
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strcat(test_file4, "/test_eloop");
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}
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static struct tst_test test = {
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.setup = setup,
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.test = link_verify,
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.tcnt = ARRAY_SIZE(tcases),
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.needs_root = 1,
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.needs_rofs = 1,
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.mntpoint = MNT_POINT,
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};
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