blob: 5ca9e72e0fc619869a045cbfdb26f0aa59a771a4 [file] [log] [blame]
/*
* Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <sys/syscall.h>
#ifdef __NR_readlinkat
# include <stdio.h>
# include <unistd.h>
# define PREFIX "test.readlinkat"
# define TARGET (PREFIX ".target")
# define LINKPATH (PREFIX ".link")
int
main(void)
{
const char * const fname = tail_memdup(LINKPATH, sizeof(LINKPATH));
const char * const hex_fname =
hexquote_strndup(fname, sizeof(LINKPATH) - 1);
const unsigned int size = sizeof(TARGET) - 1;
char * const buf = tail_alloc(size);
(void) unlink(fname);
long rc = syscall(__NR_readlinkat, -100, fname, buf, size);
printf("readlinkat(AT_FDCWD, \"%s\", %p, %u) = -1 ENOENT (%m)\n",
hex_fname, buf, size);
if (symlink(TARGET, fname))
perror_msg_and_fail("symlink");
rc = syscall(__NR_readlinkat, -100, fname, buf, size);
if (rc < 0) {
perror("readlinkat");
(void) unlink(fname);
return 77;
}
const char * const hex_buf = hexquote_strndup(buf, size);
printf("readlinkat(AT_FDCWD, \"%s\", \"%s\", %u) = %u\n",
hex_fname, hex_buf, size, size);
if (unlink(fname))
perror_msg_and_fail("unlink");
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_readlink")
#endif