busybox/debianutils/readlink.c

/* vi: set sw=4 ts=4: */
/*
 * Mini readlink implementation for busybox
 *
 * Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
 *
 * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
 */

#include "busybox.h"
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <getopt.h>

int readlink_main(int argc, char **argv)
{
	char *buf;
	char *fname;

	USE_FEATURE_READLINK_FOLLOW(
		unsigned opt;
		/* We need exactly one non-option argument.  */
		opt_complementary = "=1";
		opt = getopt32(argc, argv, "f");
		fname = argv[optind];
	)
	SKIP_FEATURE_READLINK_FOLLOW(
		const unsigned opt = 0;
		if (argc != 2) bb_show_usage();
		fname = argv[1];
	)

	/* compat: coreutils readlink reports errors silently via exit code */
	logmode = LOGMODE_NONE;

	if (opt) {
		buf = realpath(fname, bb_common_bufsiz1);
	} else {
		buf = xreadlink(fname);
	}

	if (!buf)
		return EXIT_FAILURE;
	puts(buf);

	if (ENABLE_FEATURE_CLEAN_UP && buf != bb_common_bufsiz1)
		free(buf);

	fflush_stdout_and_exit(EXIT_SUCCESS);
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Mini readlink implementation for busybox
4	*
5	* Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
6	*
7	* Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
8	*/
9
10	#include "busybox.h"
11	#include <errno.h>
12	#include <unistd.h>
13	#include <stdlib.h>
14	#include <getopt.h>
15
16	int readlink_main(int argc, char **argv)
17	{
18	char *buf;
19	char *fname;
20
21	USE_FEATURE_READLINK_FOLLOW(
22	unsigned opt;
23	/* We need exactly one non-option argument. */
24	opt_complementary = "=1";
25	opt = getopt32(argc, argv, "f");
26	fname = argv[optind];
27	)
28	SKIP_FEATURE_READLINK_FOLLOW(
29	const unsigned opt = 0;
30	if (argc != 2) bb_show_usage();
31	fname = argv[1];
32	)
33
34	/* compat: coreutils readlink reports errors silently via exit code */
35	logmode = LOGMODE_NONE;
36
37	if (opt) {
38	buf = realpath(fname, bb_common_bufsiz1);
39	} else {
40	buf = xreadlink(fname);
41	}
42
43	if (!buf)
44	return EXIT_FAILURE;
45	puts(buf);
46
47	if (ENABLE_FEATURE_CLEAN_UP && buf != bb_common_bufsiz1)
48	free(buf);
49
50	fflush_stdout_and_exit(EXIT_SUCCESS);
51	}