blob: bb2056a253574000f8a56f11fa2c784709b33e13 [file] [log] [blame]
Mark Whitley872138d2000-10-09 18:56:47 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Mini readlink implementation for busybox
4 *
5 *
6 * Copyright (C) 2000 by Lineo, inc.
7 * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25#include "busybox.h"
26#include <errno.h>
27#include <unistd.h>
28
29int readlink_main(int argc, char **argv)
30{
31 char *buf = NULL;
32 int bufsize = 128, size = 128;
33
34 if (argc != 2)
35 usage(readlink_usage);
36
37 while (bufsize < size + 1) {
38 bufsize *= 2;
39 buf = xrealloc(buf, bufsize);
40 size = readlink(argv[1], buf, bufsize);
41 if (size == -1)
Matt Kraai1fa1ade2000-12-18 03:57:16 +000042 perror_msg_and_die("%s", argv[1]);
Mark Whitley872138d2000-10-09 18:56:47 +000043 }
44
45 buf[size] = '\0';
46 puts(buf);
47
48 return EXIT_SUCCESS;
49}