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/*
* Author: Colin King <colin.king@canonical.com>
*
* Copyright (C) 2012 Canonical, Ltd.
*
* 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <fcntl.h>
#define TEST_PASSED (0)
#define TEST_FAILED (1)
#define TEST_ERROR (2)
/*
* https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524919
*
* test that readlink() and lstat() size of a symlink are the same length
*/
int main(int argc, char **argv)
{
char link[PATH_MAX];
char buf[PATH_MAX];
struct stat statbuf;
int rc = TEST_PASSED;
int fd;
ssize_t n;
if (argc < 2) {
fprintf(stderr, "Usage: filename\n");
exit(TEST_ERROR);
}
if ((fd = open(argv[1], O_CREAT | O_RDWR, S_IRUSR | S_IWUSR)) < 0) {
fprintf(stderr, "cannot create %s : %s\n", argv[1],
strerror(errno));
exit(TEST_ERROR);
}
if (close(fd) < 0) {
fprintf(stderr, "close failed %s: %s\n", argv[1],
strerror(errno));
rc = TEST_ERROR;
goto tidy_file;
}
snprintf(link, sizeof(link), "%s-symlink", argv[1]);
if (symlink(argv[1], link) < 0) {
fprintf(stderr, "symlink failed %s: %s\n", argv[1],
strerror(errno));
rc = TEST_ERROR;
goto tidy_file;
}
n = readlink(link, buf, sizeof(buf));
if (n < 0) {
fprintf(stderr, "readlink failed %s: %s\n", argv[1],
strerror(errno));
rc = TEST_ERROR;
goto tidy_symlink;
}
if (lstat(link, &statbuf) < 0) {
fprintf(stderr, "lstat failed %s: %s\n", argv[1],
strerror(errno));
rc = TEST_ERROR;
goto tidy_symlink;
}
/* Should be the same size */
if (statbuf.st_size != n)
rc = TEST_FAILED;
tidy_symlink:
unlink(link);
tidy_file:
unlink(argv[1]);
exit(rc);
}
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