1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1991, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33
34#include <err.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <unistd.h>
38
39static void usage(void) __dead2;
40
41int
42main(int argc, char *argv[])
43{
44	char buf[PATH_MAX];
45	char *p;
46	const char *path;
47	int ch, qflag, rval;
48
49	qflag = 0;
50	while ((ch = getopt(argc, argv, "q")) != -1) {
51		switch (ch) {
52		case 'q':
53			qflag = 1;
54			break;
55		case '?':
56		default:
57			usage();
58		}
59	}
60	argc -= optind;
61	argv += optind;
62	path = *argv != NULL ? *argv++ : ".";
63	rval  = 0;
64	do {
65		if ((p = realpath(path, buf)) == NULL) {
66			if (!qflag)
67				warn("%s", path);
68			rval = 1;
69		} else
70			(void)printf("%s\n", p);
71	} while ((path = *argv++) != NULL);
72	exit(rval);
73}
74
75static void
76usage(void)
77{
78
79	(void)fprintf(stderr, "usage: realpath [-q] [path ...]\n");
80  	exit(1);
81}
82