usr.sbin/vipw/vipw.c

   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  * @(#) Copyright (c) 1987, 1993, 1994 The Regents of the University of California.  All rights reserved.
  34  * @(#)vipw.c   8.3 (Berkeley) 4/2/94
  35  * $FreeBSD: src/usr.sbin/vipw/vipw.c,v 1.11 1999/10/25 09:46:57 sheldonh Exp $
  36  * $DragonFly: src/usr.sbin/vipw/vipw.c,v 1.5 2005/12/05 01:23:23 swildner Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #include <err.h>
  43 #include <pwd.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #include "pw_util.h"
  50
  51 extern char *mppath;
  52 extern char *masterpasswd;
  53 char *tempname;
  54
  55 void    copyfile(int, int);
  56 static void     usage(void);
  57
  58 int
  59 main(int argc, char *argv[])
  60 {
  61         int pfd, tfd;
  62         struct stat begin, end;
  63         int ch;
  64
  65         while ((ch = getopt(argc, argv, "d:")) != -1)
  66                 switch (ch) {
  67                 case 'd':
  68                         if ((masterpasswd = malloc(strlen(optarg) +
  69                             strlen(_MASTERPASSWD) + 2)) == NULL)
  70                                 err(1, NULL);
  71                         strcpy(masterpasswd, optarg);
  72                         if (masterpasswd[strlen(masterpasswd) - 1] != '/')
  73                                 strcat(masterpasswd, "/" _MASTERPASSWD);
  74                         else
  75                                 strcat(masterpasswd, _MASTERPASSWD);
  76                         if ((mppath = strdup(optarg)) == NULL)
  77                                 err(1, NULL);
  78                         if (mppath[strlen(mppath) - 1] == '/')
  79                                 mppath[strlen(mppath) - 1] = '\0';
  80                         break;
  81                 case '?':
  82                 default:
  83                         usage();
  84                 }
  85
  86         argc -= optind;
  87         argv += optind;
  88
  89         if (argc != 0)
  90                 usage();
  91
  92         pw_init();
  93         pfd = pw_lock();
  94         tfd = pw_tmp();
  95         copyfile(pfd, tfd);
  96         close(tfd);
  97         /* Force umask for partial writes made in the edit phase */
  98         umask(077);
  99
 100         for (;;) {
 101                 if (stat(tempname, &begin))
 102                         pw_error(tempname, 1, 1);
 103                 pw_edit(0);
 104                 if (stat(tempname, &end))
 105                         pw_error(tempname, 1, 1);
 106                 if (begin.st_mtime == end.st_mtime) {
 107                         warnx("no changes made");
 108                         pw_error((char *)NULL, 0, 0);
 109                 }
 110                 if (pw_mkdb((char *)NULL))
 111                         break;
 112                 pw_prompt();
 113         }
 114         exit(0);
 115 }
 116
 117 void
 118 copyfile(int from, int to)
 119 {
 120         int nr, nw, off;
 121         char buf[8*1024];
 122
 123         while ((nr = read(from, buf, sizeof(buf))) > 0)
 124                 for (off = 0; off < nr; nr -= nw, off += nw)
 125                         if ((nw = write(to, buf + off, nr)) < 0)
 126                                 pw_error(tempname, 1, 1);
 127         if (nr < 0)
 128                 pw_error(masterpasswd, 1, 1);
 129 }
 130
 131 static void
 132 usage(void)
 133 {
 134         fprintf(stderr, "usage: vipw [ -d directory ]\n");
 135         exit(1);
 136 }