usr.sbin/vipw/vipw.c

   1 /*
   2  * Copyright (c) 1987, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 2002 Networks Associates Technology, Inc.
   5  * All rights reserved.
   6  *
   7  * Portions of this software were developed for the FreeBSD Project by
   8  * ThinkSec AS and NAI Labs, the Security Research Division of Network
   9  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
  10  * ("CBOSS"), as part of the DARPA CHATS research program.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#) Copyright (c) 1987, 1993, 1994 The Regents of the University of California.  All rights reserved.
  37  * @(#)vipw.c   8.3 (Berkeley) 4/2/94
  38  * $FreeBSD: src/usr.sbin/vipw/vipw.c,v 1.16 2004/08/07 04:28:56 imp Exp $
  39  * $DragonFly: src/usr.sbin/vipw/vipw.c,v 1.5 2005/12/05 01:23:23 swildner Exp $
  40  */
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44
  45 #include <err.h>
  46 #include <pwd.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include <libutil.h>            /* must be after pwd.h */
  53
  54 static void     usage(void);
  55
  56 int
  57 main(int argc, char *argv[])
  58 {
  59         const char *passwd_dir = NULL;
  60         int ch, pfd, tfd;
  61         char *line;
  62         size_t len;
  63
  64         while ((ch = getopt(argc, argv, "d:")) != -1)
  65                 switch (ch) {
  66                 case 'd':
  67                         passwd_dir = optarg;
  68                         break;
  69                 case '?':
  70                 default:
  71                         usage();
  72                 }
  73
  74         argc -= optind;
  75         argv += optind;
  76
  77         if (argc != 0)
  78                 usage();
  79
  80         if (pw_init(passwd_dir, NULL) == -1)
  81                 err(1, "pw_init()");
  82         if ((pfd = pw_lock()) == -1) {
  83                 pw_fini();
  84                 err(1, "pw_lock()");
  85         }
  86         if ((tfd = pw_tmp(pfd)) == -1) {
  87                 pw_fini();
  88                 err(1, "pw_tmp()");
  89         }
  90         close(tfd);
  91         /* Force umask for partial writes made in the edit phase */
  92         umask(077);
  93
  94         for (;;) {
  95                 switch (pw_edit(0)) {
  96                 case -1:
  97                         pw_fini();
  98                         err(1, "pw_edit()");
  99                 case 0:
 100                         pw_fini();
 101                         errx(0, "no changes made");
 102                 default:
 103                         break;
 104                 }
 105                 if (pw_mkdb(NULL) == 0) {
 106                         pw_fini();
 107                         errx(0, "password list updated");
 108                 }
 109                 printf("re-edit the password file? ");
 110                 fflush(stdout);
 111                 if ((line = fgetln(stdin, &len)) == NULL) {
 112                         pw_fini();
 113                         err(1, "fgetln()");
 114                 }
 115                 if (len > 0 && (*line == 'N' || *line == 'n'))
 116                         break;
 117         }
 118         pw_fini();
 119         exit(0);
 120 }
 121
 122 static void
 123 usage(void)
 124 {
 125         fprintf(stderr, "usage: vipw [ -d directory ]\n");
 126         exit(1);
 127 }