xref: /freebsd/usr.sbin/vipw/vipw.c (revision 4cf49a43559ed9fdad601bdcccd2c55963008675)
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
35 static 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
42 static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
43 #endif
44 static const char rcsid[] =
45   "$FreeBSD$";
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 
60 extern char *mppath;
61 extern char *masterpasswd;
62 char *tempname;
63 
64 void	copyfile __P((int, int));
65 static void	usage __P((void));
66 
67 int
68 main(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 
127 void
128 copyfile(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 
142 static void
143 usage()
144 {
145 
146 	(void)fprintf(stderr, "usage: vipw [ -d directory ]\n");
147 	exit(1);
148 }
149