system_cmds/vipw.tproj/vipw.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1987, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  */
  56
  57 #include <sys/cdefs.h>
  58 #ifndef lint
  59 __unused static char copyright[] =
  60 "@(#) Copyright (c) 1987, 1993, 1994\n\
  61         The Regents of the University of California.  All rights reserved.\n";
  62 #endif /* not lint */
  63
  64 #ifndef lint
  65 __unused static char sccsid[] = "@(#)vipw.c     8.3 (Berkeley) 4/2/94";
  66 #endif /* not lint */
  67
  68 #include <sys/types.h>
  69 #include <sys/stat.h>
  70
  71 #include <err.h>
  72 #include <pwd.h>
  73 #include <stdio.h>
  74 #include <stdlib.h>
  75 #include <string.h>
  76 #include <unistd.h>
  77
  78 #include "pw_util.h"
  79
  80 char *tempname;
  81
  82 void    copyfile __P((int, int));
  83 void    usage __P((void));
  84
  85 int
  86 main(int argc, char *argv[])
  87 {
  88         int pfd, tfd;
  89         struct stat begin, end;
  90         int ch;
  91
  92         while ((ch = getopt(argc, argv, "")) != EOF)
  93                 switch (ch) {
  94                 case '?':
  95                 default:
  96                         usage();
  97                 }
  98
  99         argc -= optind;
 100         argv += optind;
 101
 102         if (argc != 0)
 103                 usage();
 104
 105         pw_init();
 106         pfd = pw_lock();
 107         tfd = pw_tmp();
 108         copyfile(pfd, tfd);
 109         (void)close(tfd);
 110
 111         for (;;) {
 112                 if (stat(tempname, &begin))
 113                         pw_error(tempname, 1, 1);
 114                 pw_edit(0);
 115                 if (stat(tempname, &end))
 116                         pw_error(tempname, 1, 1);
 117                 if (begin.st_mtime == end.st_mtime) {
 118                         warnx("no changes made");
 119                         pw_error((char *)NULL, 0, 0);
 120                 }
 121                 if (pw_mkdb())
 122                         break;
 123                 pw_prompt();
 124         }
 125         exit(0);
 126 }
 127
 128 void
 129 copyfile(int from, int to)
 130 {
 131         long nr, nw, off;
 132         char buf[8*1024];
 133
 134         while ((nr = read(from, buf, sizeof(buf))) > 0)
 135                 for (off = 0; off < nr; nr -= nw, off += nw)
 136                         if ((nw = write(to, buf + off, nr)) < 0)
 137                                 pw_error(tempname, 1, 1);
 138         if (nr < 0)
 139                 pw_error(_PATH_MASTERPASSWD, 1, 1);
 140 }
 141
 142 void
 143 usage(void)
 144 {
 145         (void)fprintf(stderr, "usage: vipw\n");
 146         exit(1);
 147 }