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vipw.c revision 1.4 
      1 /*	$NetBSD: vipw.c,v 1.4 1996/05/15 23:23:50 jtc 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 #ifndef lint
     37 static char copyright[] =
     38 "@(#) 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 static char sccsid[] = "@(#)vipw.c	8.3 (Berkeley) 4/2/94";
     44 #endif /* not lint */
     45 
     46 #include <sys/types.h>
     47 #include <sys/stat.h>
     48 
     49 #include <err.h>
     50 #include <pwd.h>
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <string.h>
     54 #include <unistd.h>
     55 #include <fcntl.h>
     56 #include <util.h>
     57 
     58 void	copyfile __P((int, int));
     59 void	usage __P((void));
     60 
     61 int
     62 main(argc, argv)
     63 	int argc;
     64 	char *argv[];
     65 {
     66 	int pfd, tfd;
     67 	struct stat begin, end;
     68 	int ch;
     69 
     70 	while ((ch = getopt(argc, argv, "")) != EOF) {
     71 		switch (ch) {
     72 		case '?':
     73 		default:
     74 			usage();
     75 		}
     76 	}
     77 	argc -= optind;
     78 	argv += optind;
     79 
     80 	if (argc != 0)
     81 		usage();
     82 
     83 	pw_init();
     84 	tfd = pw_lock(0);
     85 	if (tfd < 0)
     86 		errx(1, "the passwd file is busy.");
     87 	pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
     88 	if (pfd < 0)
     89 		pw_error(_PATH_MASTERPASSWD, 1, 1);
     90 	copyfile(pfd, tfd);
     91 	(void)close(tfd);
     92 
     93 	for (;;) {
     94 		if (stat(_PATH_MASTERPASSWD_LOCK, &begin))
     95 			pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
     96 		pw_edit(0, NULL);
     97 		if (stat(_PATH_MASTERPASSWD_LOCK, &end))
     98 			pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
     99 		if (begin.st_mtime == end.st_mtime) {
    100 			warnx("no changes made");
    101 			pw_error((char *)NULL, 0, 0);
    102 		}
    103 		if (pw_mkdb() == 0)
    104 			break;
    105 		pw_prompt();
    106 	}
    107 	exit(0);
    108 }
    109 
    110 void
    111 copyfile(from, to)
    112 	int from, to;
    113 {
    114 	int nr, nw, off;
    115 	char buf[8*1024];
    116 
    117 	while ((nr = read(from, buf, sizeof(buf))) > 0)
    118 		for (off = 0; off < nr; nr -= nw, off += nw)
    119 			if ((nw = write(to, buf + off, nr)) < 0)
    120 				pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
    121 	if (nr < 0)
    122 		pw_error(_PATH_MASTERPASSWD, 1, 1);
    123 }
    124 
    125 void
    126 usage()
    127 {
    128 
    129 	(void)fprintf(stderr, "usage: vipw\n");
    130 	exit(1);
    131 }
    132