xref: /freebsd/bin/realpath/realpath.c (revision a2aef24aa3c8458e4036735dd6928b4ef77294e5)
1 /*-
2  * Copyright (c) 1991, 1993, 1994
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32 
33 #include <sys/param.h>
34 
35 #include <err.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39 
40 static void usage(void) __dead2;
41 
42 int
43 main(int argc, char *argv[])
44 {
45 	char buf[PATH_MAX];
46 	char *p;
47 	const char *path;
48 	int ch, qflag, rval;
49 
50 	qflag = 0;
51 	while ((ch = getopt(argc, argv, "q")) != -1) {
52 		switch (ch) {
53 		case 'q':
54 			qflag = 1;
55 			break;
56 		case '?':
57 		default:
58 			usage();
59 		}
60 	}
61 	argc -= optind;
62 	argv += optind;
63 	path = *argv != NULL ? *argv++ : ".";
64 	rval  = 0;
65 	do {
66 		if ((p = realpath(path, buf)) == NULL) {
67 			if (!qflag)
68 				warn("%s", path);
69 			rval = 1;
70 		} else
71 			(void)printf("%s\n", p);
72 	} while ((path = *argv++) != NULL);
73 	exit(rval);
74 }
75 
76 static void
77 usage(void)
78 {
79 
80 	(void)fprintf(stderr, "usage: realpath [-q] [path ...]\n");
81   	exit(1);
82 }
83