1/*	$NetBSD: vipw.c,v 1.15 2011/08/30 20:52:10 joerg Exp $	*/
2
3/*
4 * Copyright (c) 1987, 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/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
41#else
42__RCSID("$NetBSD: vipw.c,v 1.15 2011/08/30 20:52:10 joerg Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/types.h>
47#include <sys/param.h>
48#include <sys/stat.h>
49
50#include <err.h>
51#include <pwd.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56#include <fcntl.h>
57#include <errno.h>
58#include <util.h>
59
60static void	copyfile(int, int);
61__dead static void	usage(void);
62
63static char mpwd[MAXPATHLEN], mpwdl[MAXPATHLEN];
64
65int
66main(int argc, char *argv[])
67{
68	const char *prefix;
69	int pfd, tfd;
70	struct stat begin, end;
71	int ch;
72
73	prefix = "";
74	while ((ch = getopt(argc, argv, "d:")) != -1) {
75		switch (ch) {
76		case 'd':
77			prefix = optarg;
78			if (pw_setprefix(prefix) < 0)
79				err(1, "%s", prefix);
80			break;
81		case '?':
82		default:
83			usage();
84		}
85	}
86	argc -= optind;
87	argv += optind;
88
89	if (argc != 0)
90		usage();
91
92	(void)snprintf(mpwd, sizeof(mpwd), "%s%s", prefix, _PATH_MASTERPASSWD);
93	(void)snprintf(mpwdl, sizeof(mpwdl), "%s%s", prefix,
94		_PATH_MASTERPASSWD_LOCK);
95
96	pw_init();
97	tfd = pw_lock(0);
98	if (tfd < 0) {
99		if (errno == EEXIST)
100			errx(1, "the passwd file is busy.");
101		else
102			err(1, "%s", mpwdl);
103	}
104
105	pfd = open(mpwd, O_RDONLY, 0);
106	if (pfd < 0)
107		pw_error(mpwd, 1, 1);
108	copyfile(pfd, tfd);
109	(void)close(tfd);
110
111	for (;;) {
112		if (stat(mpwdl, &begin))
113			pw_error(mpwdl, 1, 1);
114		pw_edit(0, NULL);
115		if (stat(mpwdl, &end))
116			pw_error(mpwdl, 1, 1);
117		if (begin.st_mtime == end.st_mtime &&
118		    begin.st_mtimensec == end.st_mtimensec) {
119			warnx("no changes made");
120			pw_error(NULL, 0, 0);
121		}
122		if (pw_mkdb(NULL, 0) == 0)
123			break;
124		pw_prompt();
125	}
126	return 0;
127}
128
129static void
130copyfile(int from, int to)
131{
132	int nr, nw, off;
133	char buf[8*1024];
134
135	while ((nr = read(from, buf, sizeof(buf))) > 0)
136		for (off = 0; off < nr; nr -= nw, off += nw)
137			if ((nw = write(to, buf + off, nr)) < 0)
138				pw_error(mpwdl, 1, 1);
139	if (nr < 0)
140		pw_error(mpwd, 1, 1);
141}
142
143static void
144usage(void)
145{
146
147	(void)fprintf(stderr, "usage: %s [-d directory]\n", getprogname());
148	exit(1);
149}
150