vipw.c revision 48328 
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: vipw.c,v 1.8 1999/06/26 12:15:39 pb Exp $";
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
60extern char *mppath;
61extern char *masterpasswd;
62char *tempname;
63
64void	copyfile __P((int, int));
65static void	usage __P((void));
66
67int
68main(argc, argv)
69	int argc;
70	char *argv[];
71{
72	int pfd, tfd;
73	struct stat begin, end;
74	int ch;
75
76	while ((ch = getopt(argc, argv, "d:")) != -1)
77		switch (ch) {
78		case 'd':
79			if ((masterpasswd = malloc(strlen(optarg) +
80			    strlen(_MASTERPASSWD) + 2)) == NULL)
81				err(1, NULL);
82			strcpy(masterpasswd, optarg);
83			if (masterpasswd[strlen(masterpasswd) - 1] != '/')
84				masterpasswd[strlen(masterpasswd)] = '/';
85			strcat(masterpasswd, _MASTERPASSWD);
86			if ((mppath = strdup(optarg)) == NULL)
87				err(1, NULL);
88			if (mppath[strlen(mppath) - 1] == '/')
89				mppath[strlen(mppath) - 1] = '\0';
90			break;
91		case '?':
92		default:
93			usage();
94		}
95
96	argc -= optind;
97	argv += optind;
98
99	if (argc != 0)
100		usage();
101
102	pw_init();
103	pfd = pw_lock();
104	tfd = pw_tmp();
105	copyfile(pfd, tfd);
106	(void)close(tfd);
107	/* Force umask for partial writes made in the edit phase */
108	(void)umask(077);
109
110	for (;;) {
111		if (stat(tempname, &begin))
112			pw_error(tempname, 1, 1);
113		pw_edit(0);
114		if (stat(tempname, &end))
115			pw_error(tempname, 1, 1);
116		if (begin.st_mtime == end.st_mtime) {
117			warnx("no changes made");
118			pw_error((char *)NULL, 0, 0);
119		}
120		if (pw_mkdb((char *)NULL))
121			break;
122		pw_prompt();
123	}
124	exit(0);
125}
126
127void
128copyfile(from, to)
129	int from, to;
130{
131	int nr, nw, off;
132	char buf[8*1024];
133
134	while ((nr = read(from, buf, sizeof(buf))) > 0)
135		for (off = 0; off < nr; nr -= nw, off += nw)
136			if ((nw = write(to, buf + off, nr)) < 0)
137				pw_error(tempname, 1, 1);
138	if (nr < 0)
139		pw_error(masterpasswd, 1, 1);
140}
141
142static void
143usage()
144{
145
146	(void)fprintf(stderr, "usage: vipw [ -d directory ]\n");
147	exit(1);
148}
149