vipw.c revision 30765 
1/*
2 * Copyright (c) 1987, 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. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1987, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
43#endif
44static const char rcsid[] =
45	"$Id$";
46#endif /* not lint */
47
48#include <sys/types.h>
49#include <sys/stat.h>
50
51#include <err.h>
52#include <pwd.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "pw_util.h"
59
60char *tempname;
61
62void	copyfile __P((int, int));
63static void	usage __P((void));
64
65int
66main(argc, argv)
67	int argc;
68	char *argv[];
69{
70	int pfd, tfd;
71	struct stat begin, end;
72	int ch;
73
74	while ((ch = getopt(argc, argv, "")) != -1)
75		switch (ch) {
76		case '?':
77		default:
78			usage();
79		}
80
81	argc -= optind;
82	argv += optind;
83
84	if (argc != 0)
85		usage();
86
87	pw_init();
88	pfd = pw_lock();
89	tfd = pw_tmp();
90	copyfile(pfd, tfd);
91	(void)close(tfd);
92
93	for (;;) {
94		if (stat(tempname, &begin))
95			pw_error(tempname, 1, 1);
96		pw_edit(0);
97		if (stat(tempname, &end))
98			pw_error(tempname, 1, 1);
99		if (begin.st_mtime == end.st_mtime) {
100			warnx("no changes made");
101			pw_error((char *)NULL, 0, 0);
102		}
103		if (pw_mkdb((char *)NULL))
104			break;
105		pw_prompt();
106	}
107	exit(0);
108}
109
110void
111copyfile(from, to)
112	int from, to;
113{
114	int nr, nw, off;
115	char buf[8*1024];
116
117	while ((nr = read(from, buf, sizeof(buf))) > 0)
118		for (off = 0; off < nr; nr -= nw, off += nw)
119			if ((nw = write(to, buf + off, nr)) < 0)
120				pw_error(tempname, 1, 1);
121	if (nr < 0)
122		pw_error(_PATH_MASTERPASSWD, 1, 1);
123}
124
125static void
126usage()
127{
128
129	(void)fprintf(stderr, "usage: vipw\n");
130	exit(1);
131}
132