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/* vi: set sw=4 ts=4: */
/*
* Mini readlink implementation for busybox
*
* Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>
#include "busybox.h"
#ifdef CONFIG_FEATURE_READLINK_FOLLOW
# define READLINK_FOLLOW "f"
# define READLINK_FLAG_f (1 << 0)
#else
# define READLINK_FOLLOW ""
#endif
static const char readlink_options[] = READLINK_FOLLOW;
int readlink_main(int argc, char **argv)
{
char *buf = NULL;
unsigned long opt = bb_getopt_ulflags(argc, argv, readlink_options);
#ifdef CONFIG_FEATURE_READLINK_FOLLOW
RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
#endif
/* no options, no getopt */
if (optind + 1 != argc)
bb_show_usage();
#ifdef CONFIG_FEATURE_READLINK_FOLLOW
if (opt & READLINK_FLAG_f) {
buf = realpath(argv[optind], resolved_path);
} else
#endif
buf = xreadlink(argv[optind]);
if (!buf)
return EXIT_FAILURE;
puts(buf);
#ifdef CONFIG_FEATURE_CLEAN_UP
free(buf);
#endif
return EXIT_SUCCESS;
}
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