1/* vi: set sw=4 ts=4: */
2
3/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
4
5/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
6 *
7 * Now does proper error checking on output and returns a failure exit code
8 * if one or more paths cannot be resolved.
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 */
12
13#include "libbb.h"
14
15int realpath_main(int argc, char **argv);
16int realpath_main(int argc, char **argv)
17{
18	int retval = EXIT_SUCCESS;
19
20#if PATH_MAX > (BUFSIZ+1)
21	RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
22# define resolved_path_MUST_FREE 1
23#else
24#define resolved_path bb_common_bufsiz1
25# define resolved_path_MUST_FREE 0
26#endif
27
28	if (--argc == 0) {
29		bb_show_usage();
30	}
31
32	do {
33		argv++;
34		if (realpath(*argv, resolved_path) != NULL) {
35			puts(resolved_path);
36		} else {
37			retval = EXIT_FAILURE;
38			bb_perror_msg("%s", *argv);
39		}
40	} while (--argc);
41
42#if ENABLE_FEATURE_CLEAN_UP && resolved_path_MUST_FREE
43	RELEASE_CONFIG_BUFFER(resolved_path);
44#endif
45
46	fflush_stdout_and_exit(retval);
47}
48