130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2018 Linaro Limited. All rights reserved.
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* Author: Rafael David Tinoco <rafael.tinoco@linaro.org>
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*/
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/*
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* Test Name: lremovexattr01
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*
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* Description:
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* lremovexattr(2) removes the extended attribute identified by a name and
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* associated with a given path in the filesystem. Unlike removexattr(2),
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* lremovexattr(2) removes the attribute from the symbolic link only, and not
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* the file. This test verifies that a simple call to lremovexattr(2) removes,
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* indeed, a previously set attribute key/value from a symbolic link, and the
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* symbolic link _only_.
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*
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* Note:
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* According to attr(5), extended attributes are interpreted differently from
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* regular files, directories and symbolic links. User attributes are only
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* allowed for regular files and directories, thus the need of using trusted.*
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* attributes for this test.
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*/
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#include "config.h"
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_XATTR_H
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# include <sys/xattr.h>
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#endif
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#include "tst_test.h"
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#ifdef HAVE_SYS_XATTR_H
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#define ENOATTR ENODATA
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#define XATTR_KEY "trusted.key1"
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#define XATTR_VALUE "file and link"
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#define XATTR_VALUE_SIZE 13
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#define MNTPOINT "mntpoint"
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#define FILENAME MNTPOINT"/lremovexattr01testfile"
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#define SYMLINK MNTPOINT"/lremovexattr01symlink"
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static char got_value[XATTR_VALUE_SIZE];
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static void verify_lremovexattr(void)
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{
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/* set attribute on both: file and symlink */
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SAFE_SETXATTR(FILENAME, XATTR_KEY, XATTR_VALUE, XATTR_VALUE_SIZE,
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XATTR_CREATE);
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SAFE_LSETXATTR(SYMLINK, XATTR_KEY, XATTR_VALUE, XATTR_VALUE_SIZE,
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XATTR_CREATE);
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/* remove attribute from symlink only */
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TEST(lremovexattr(SYMLINK, XATTR_KEY));
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if (TST_RET != 0) {
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tst_res(TFAIL | TTERRNO, "lremovexattr(2) failed");
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return;
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}
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/* make sure attribute is gone from symlink */
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memset(&got_value, 0, XATTR_VALUE_SIZE);
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TEST(lgetxattr(SYMLINK, XATTR_KEY, &got_value, XATTR_VALUE_SIZE));
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if (TST_RET >= 0) {
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tst_res(TFAIL, "lremovexattr(2) did not work");
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return;
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}
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if (TST_ERR != ENOATTR) {
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tst_brk(TBROK | TTERRNO, "lgetxattr(2) failed unexpectedly");
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return;
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}
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/* check if file is unchanged, like it should be */
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memset(&got_value, 0, XATTR_VALUE_SIZE);
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TEST(getxattr(FILENAME, XATTR_KEY, &got_value, XATTR_VALUE_SIZE));
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if (TST_RET <= 0) {
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tst_res(TFAIL, "lremovexattr(2) deleted file attribute");
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return;
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}
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if (strncmp(got_value, XATTR_VALUE, XATTR_VALUE_SIZE)) {
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tst_res(TFAIL, "lremovexattr(2) changed file attribute");
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return;
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}
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/* cleanup file attribute for iteration */
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SAFE_REMOVEXATTR(FILENAME, XATTR_KEY);
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tst_res(TPASS, "lremovexattr(2) removed attribute as expected");
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}
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static void setup(void)
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{
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SAFE_TOUCH(FILENAME, 0644, NULL);
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if (symlink(FILENAME, SYMLINK) < 0)
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tst_brk(TCONF, "symlink() not supported");
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = verify_lremovexattr,
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.mntpoint = MNTPOINT,
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.mount_device = 1,
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.all_filesystems = 1,
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.needs_root = 1,
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};
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#else /* HAVE_SYS_XATTR_H */
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TST_TEST_TCONF("<sys/xattr.h> does not exist");
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#endif
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