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vipw.c revision 1.7 
      1 /*	$NetBSD: vipw.c,v 1.7 2000/12/06 14:04:25 tron 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1987, 1993, 1994\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
     45 #else
     46 __RCSID("$NetBSD: vipw.c,v 1.7 2000/12/06 14:04:25 tron Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <sys/types.h>
     51 #include <sys/param.h>
     52 #include <sys/stat.h>
     53 
     54 #include <err.h>
     55 #include <pwd.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 #include <unistd.h>
     60 #include <fcntl.h>
     61 #include <errno.h>
     62 #include <util.h>
     63 
     64 int	main __P((int, char **));
     65 static void	copyfile __P((int, int));
     66 static void	usage __P((void));
     67 
     68 char mpwd[MAXPATHLEN], mpwdl[MAXPATHLEN];
     69 
     70 int
     71 main(int argc, char *argv[])
     72 {
     73 	char *prefix;
     74 	int pfd, tfd;
     75 	struct stat begin, end;
     76 	int ch;
     77 
     78 	prefix = "";
     79 	while ((ch = getopt(argc, argv, "d:")) != -1) {
     80 		switch (ch) {
     81 		case 'd':
     82 			prefix = optarg;
     83 			if (pw_setprefix(prefix) < 0)
     84 				err(1, "%s", prefix);
     85 			break;
     86 		case '?':
     87 		default:
     88 			usage();
     89 		}
     90 	}
     91 	argc -= optind;
     92 	argv += optind;
     93 
     94 	if (argc != 0)
     95 		usage();
     96 
     97 	(void)snprintf(mpwd, sizeof(mpwd), "%s%s", prefix, _PATH_MASTERPASSWD);
     98 	(void)snprintf(mpwdl, sizeof(mpwdl), "%s%s", prefix,
     99 		_PATH_MASTERPASSWD_LOCK);
    100 
    101 	pw_init();
    102 	tfd = pw_lock(0);
    103 	if (tfd < 0) {
    104 		if (errno == EEXIST)
    105 			errx(1, "the passwd file is busy.");
    106 		else
    107 			err(1, "%s", mpwdl);
    108 	}
    109 
    110 	pfd = open(mpwd, O_RDONLY, 0);
    111 	if (pfd < 0)
    112 		pw_error(mpwd, 1, 1);
    113 	copyfile(pfd, tfd);
    114 	(void)close(tfd);
    115 
    116 	for (;;) {
    117 		if (stat(mpwdl, &begin))
    118 			pw_error(mpwdl, 1, 1);
    119 		pw_edit(0, NULL);
    120 		if (stat(mpwdl, &end))
    121 			pw_error(mpwdl, 1, 1);
    122 		if (begin.st_mtime == end.st_mtime) {
    123 			warnx("no changes made");
    124 			pw_error((char *)NULL, 0, 0);
    125 		}
    126 		if (pw_mkdb() == 0)
    127 			break;
    128 		pw_prompt();
    129 	}
    130 	return 0;
    131 }
    132 
    133 static void
    134 copyfile(int from, int to)
    135 {
    136 	int nr, nw, off;
    137 	char buf[8*1024];
    138 
    139 	while ((nr = read(from, buf, sizeof(buf))) > 0)
    140 		for (off = 0; off < nr; nr -= nw, off += nw)
    141 			if ((nw = write(to, buf + off, nr)) < 0)
    142 				pw_error(mpwdl, 1, 1);
    143 	if (nr < 0)
    144 		pw_error(mpwd, 1, 1);
    145 }
    146 
    147 static void
    148 usage(void)
    149 {
    150 	extern char *__progname;
    151 
    152 	(void)fprintf(stderr, "Usage: %s [-d directory]\n", __progname);
    153 	exit(1);
    154 }
    155