xref: /freebsd/usr.sbin/vipw/vipw.c (revision 123af6ec70016f5556da5972d4d63c7d175c06d3)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1987, 1993, 1994
5  *	The Regents of the University of California.  All rights reserved.
6  * Copyright (c) 2002 Networks Associates Technology, Inc.
7  * All rights reserved.
8  *
9  * Portions of this software were developed for the FreeBSD Project by
10  * ThinkSec AS and NAI Labs, the Security Research Division of Network
11  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
12  * ("CBOSS"), as part of the DARPA CHATS research program.
13  *
14  * Redistribution and use in source and binary forms, with or without
15  * modification, are permitted provided that the following conditions
16  * are met:
17  * 1. Redistributions of source code must retain the above copyright
18  *    notice, this list of conditions and the following disclaimer.
19  * 2. Redistributions in binary form must reproduce the above copyright
20  *    notice, this list of conditions and the following disclaimer in the
21  *    documentation and/or other materials provided with the distribution.
22  * 3. Neither the name of the University nor the names of its contributors
23  *    may be used to endorse or promote products derived from this software
24  *    without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36  * SUCH DAMAGE.
37  */
38 
39 #if 0
40 #ifndef lint
41 static const char copyright[] =
42 "@(#) Copyright (c) 1987, 1993, 1994\n\
43 	The Regents of the University of California.  All rights reserved.\n";
44 #endif /* not lint */
45 
46 #ifndef lint
47 static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
48 #endif /* not lint */
49 #endif
50 #include <sys/cdefs.h>
51 __FBSDID("$FreeBSD$");
52 
53 #include <sys/types.h>
54 #include <sys/stat.h>
55 
56 #include <err.h>
57 #include <pwd.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62 
63 #include <libutil.h>		/* must be after pwd.h */
64 
65 static void	usage(void);
66 
67 int
68 main(int argc, char *argv[])
69 {
70 	const char *passwd_dir = NULL;
71 	int ch, pfd, tfd;
72 	char *line;
73 	size_t len;
74 
75 	while ((ch = getopt(argc, argv, "d:")) != -1)
76 		switch (ch) {
77 		case 'd':
78 			passwd_dir = optarg;
79 			break;
80 		case '?':
81 		default:
82 			usage();
83 		}
84 
85 	argc -= optind;
86 	argv += optind;
87 
88 	if (argc != 0)
89 		usage();
90 
91 	if (pw_init(passwd_dir, NULL) == -1)
92 		err(1, "pw_init()");
93 	if ((pfd = pw_lock()) == -1) {
94 		pw_fini();
95 		err(1, "pw_lock()");
96 	}
97 	if ((tfd = pw_tmp(pfd)) == -1) {
98 		pw_fini();
99 		err(1, "pw_tmp()");
100 	}
101 	(void)close(tfd);
102 	/* Force umask for partial writes made in the edit phase */
103 	(void)umask(077);
104 
105 	for (;;) {
106 		switch (pw_edit(0)) {
107 		case -1:
108 			pw_fini();
109 			err(1, "pw_edit()");
110 		case 0:
111 			pw_fini();
112 			errx(0, "no changes made");
113 		default:
114 			break;
115 		}
116 		if (pw_mkdb(NULL) == 0) {
117 			pw_fini();
118 			errx(0, "password list updated");
119 		}
120 		printf("re-edit the password file? ");
121 		fflush(stdout);
122 		if ((line = fgetln(stdin, &len)) == NULL) {
123 			pw_fini();
124 			err(1, "fgetln()");
125 		}
126 		if (len > 0 && (*line == 'N' || *line == 'n'))
127 			break;
128 	}
129 	pw_fini();
130 	exit(0);
131 }
132 
133 static void
134 usage(void)
135 {
136 
137 	(void)fprintf(stderr, "usage: vipw [-d directory]\n");
138 	exit(1);
139 }
140