testcases/kernel/syscalls/llistxattr/llistxattr02.c

/*
* Copyright (c) 2016 Fujitsu Ltd.
* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License
* alone with this program.
*/

/*
* Test Name: llistxattr02
*
* Description:
* 1) llistxattr(2) fails if the size of the list buffer is too small
* to hold the result.
* 2) llistxattr(2) fails if path is an empty string.
* 3) llistxattr(2) fails when attempted to read from a invalid address.
* 4) llistxattr(2) fails if path is longer than allowed.
*
* Expected Result:
* 1) llistxattr(2) should return -1 and set errno to ERANGE.
* 2) llistxattr(2) should return -1 and set errno to ENOENT.
* 3) llistxattr(2) should return -1 and set errno to EFAULT.
* 4) llistxattr(2) should return -1 and set errno to ENAMETOOLONG.
*/

#include "config.h"
#include <errno.h>
#include <sys/types.h>

#ifdef HAVE_SYS_XATTR_H
# include <sys/xattr.h>
#endif

#include "tst_test.h"

#ifdef HAVE_SYS_XATTR_H

#define SECURITY_KEY    "security.ltptest"
#define VALUE           "test"
#define VALUE_SIZE      (sizeof(VALUE) - 1)
#define TESTFILE        "testfile"
#define SYMLINK         "symlink"

static char longpathname[PATH_MAX + 2];

static struct test_case {
	const char *path;
	size_t size;
	int exp_err;
} tc[] = {
	{SYMLINK, 1, ERANGE},
	{"", 20, ENOENT},
	{(char *)-1, 20, EFAULT},
	{longpathname, 20, ENAMETOOLONG}
};

static void verify_llistxattr(unsigned int n)
{
	struct test_case *t = tc + n;
	char buf[t->size];

	TEST(llistxattr(t->path, buf, sizeof(buf)));
	if (TST_RET != -1) {
		tst_res(TFAIL,
			"llistxattr() succeeded unexpectedly (returned %ld)",
			TST_RET);
		return;
	}

	if (TST_ERR != t->exp_err) {
		tst_res(TFAIL | TTERRNO, "llistxattr() failed "
			 "unexpectedlly, expected %s",
			 tst_strerrno(t->exp_err));
	} else {
		tst_res(TPASS | TTERRNO,
			 "llistxattr() failed as expected");
	}
}

static void setup(void)
{
	SAFE_TOUCH(TESTFILE, 0644, NULL);

	SAFE_SYMLINK(TESTFILE, SYMLINK);

	SAFE_LSETXATTR(SYMLINK, SECURITY_KEY, VALUE, VALUE_SIZE, XATTR_CREATE);

	memset(longpathname, 'a', sizeof(longpathname) - 1);
}

static struct tst_test test = {
	.needs_tmpdir = 1,
	.needs_root = 1,
	.test = verify_llistxattr,
	.tcnt = ARRAY_SIZE(tc),
	.setup = setup,
};

#else /* HAVE_SYS_XATTR_H */
	TST_TEST_TCONF("<sys/xattr.h> does not exist.");
#endif