1/*	$OpenBSD: passwd.c,v 1.27 2015/11/26 19:01:47 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 1988 The Regents of the University of California.
5 * 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 <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <unistd.h>
36#include <err.h>
37
38extern int local_passwd(char *, int);
39void usage(int retval);
40
41int
42main(int argc, char **argv)
43{
44	extern int optind;
45	char *username;
46	int ch;
47
48	/* Process args and options */
49	while ((ch = getopt(argc, argv, "")) != -1)
50		switch (ch) {
51		default:
52			usage(1);
53		}
54
55	argc -= optind;
56	argv += optind;
57
58	username = getlogin();
59	if (username == NULL) {
60		fprintf(stderr, "passwd: who are you ??\n");
61		exit(1);
62	}
63
64	switch (argc) {
65	case 0:
66		break;
67	case 1:
68		username = argv[0];
69		break;
70	default:
71		usage(1);
72	}
73
74	exit(local_passwd(username, 0));
75}
76
77void
78usage(int retval)
79{
80	fprintf(stderr, "usage: passwd [user]\n");
81	exit(retval);
82}
83