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vipw.c revision 1.6 
      1 /*	$NetBSD: vipw.c,v 1.6 1998/12/09 12:40:15 christos 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 1.6 1998/12/09 12:40:15 christos Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 #include <sys/types.h>
     51 #include <sys/stat.h>
     52 
     53 #include <err.h>
     54 #include <pwd.h>
     55 #include <stdio.h>
     56 #include <stdlib.h>
     57 #include <string.h>
     58 #include <unistd.h>
     59 #include <fcntl.h>
     60 #include <errno.h>
     61 #include <util.h>
     62 
     63 int	main __P((int, char **));
     64 static 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, "")) != -1) {
     77 		switch (ch) {
     78 		case '?':
     79 		default:
     80 			usage();
     81 		}
     82 	}
     83 	argc -= optind;
     84 	argv += optind;
     85 
     86 	if (argc != 0)
     87 		usage();
     88 
     89 	pw_init();
     90 	tfd = pw_lock(0);
     91 	if (tfd < 0) {
     92 		if (errno == EEXIST)
     93 			errx(1, "the passwd file is busy.");
     94 		else
     95 			err(1, "%s", _PATH_MASTERPASSWD_LOCK);
     96 	}
     97 
     98 	pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
     99 	if (pfd < 0)
    100 		pw_error(_PATH_MASTERPASSWD, 1, 1);
    101 	copyfile(pfd, tfd);
    102 	(void)close(tfd);
    103 
    104 	for (;;) {
    105 		if (stat(_PATH_MASTERPASSWD_LOCK, &begin))
    106 			pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
    107 		pw_edit(0, NULL);
    108 		if (stat(_PATH_MASTERPASSWD_LOCK, &end))
    109 			pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
    110 		if (begin.st_mtime == end.st_mtime) {
    111 			warnx("no changes made");
    112 			pw_error((char *)NULL, 0, 0);
    113 		}
    114 		if (pw_mkdb() == 0)
    115 			break;
    116 		pw_prompt();
    117 	}
    118 	return 0;
    119 }
    120 
    121 static void
    122 copyfile(from, to)
    123 	int from, to;
    124 {
    125 	int nr, nw, off;
    126 	char buf[8*1024];
    127 
    128 	while ((nr = read(from, buf, sizeof(buf))) > 0)
    129 		for (off = 0; off < nr; nr -= nw, off += nw)
    130 			if ((nw = write(to, buf + off, nr)) < 0)
    131 				pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
    132 	if (nr < 0)
    133 		pw_error(_PATH_MASTERPASSWD, 1, 1);
    134 }
    135 
    136 static void
    137 usage()
    138 {
    139 	extern char *__progname;
    140 
    141 	(void)fprintf(stderr, "Usage: %s\n", __progname);
    142 	exit(1);
    143 }
    144