pwd_mkdb.tproj/pw_scan.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1990, 1993, 1994
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef lint
  59 static char sccsid[] = "@(#)pw_scan.c   8.3 (Berkeley) 4/2/94";
  60 #endif /* not lint */
  61
  62 /*
  63  * This module is used to "verify" password entries by chpass(1) and
  64  * pwd_mkdb(8).
  65  */
  66
  67 #include <sys/param.h>
  68
  69 #include <err.h>
  70 #include <fcntl.h>
  71 #include <pwd.h>
  72 #include <errno.h>
  73 #include <stdio.h>
  74 #include <string.h>
  75 #include <stdlib.h>
  76 #include <unistd.h>
  77
  78 #include "pw_scan.h"
  79
  80 int
  81 pw_scan(bp, pw)
  82         char *bp;
  83         struct passwd *pw;
  84 {
  85         long id;
  86         int root;
  87         char *p, *sh;
  88
  89         if (!(pw->pw_name = strsep(&bp, ":")))          /* login */
  90                 goto fmt;
  91         root = !strcmp(pw->pw_name, "root");
  92
  93         if (!(pw->pw_passwd = strsep(&bp, ":")))        /* passwd */
  94                 goto fmt;
  95
  96         if (!(p = strsep(&bp, ":")))                    /* uid */
  97                 goto fmt;
  98         id = atol(p);
  99         if (root && id) {
 100                 warnx("root uid should be 0");
 101                 return (0);
 102         }
 103         if (id > USHRT_MAX) {
 104                 warnx("%s > max uid value (%d)", p, USHRT_MAX);
 105                 return (0);
 106         }
 107         pw->pw_uid = id;
 108
 109         if (!(p = strsep(&bp, ":")))                    /* gid */
 110                 goto fmt;
 111         id = atol(p);
 112         if (id > USHRT_MAX) {
 113                 warnx("%s > max gid value (%d)", p, USHRT_MAX);
 114                 return (0);
 115         }
 116         pw->pw_gid = id;
 117
 118         pw->pw_class = strsep(&bp, ":");                /* class */
 119         if (!(p = strsep(&bp, ":")))                    /* change */
 120                 goto fmt;
 121         pw->pw_change = atol(p);
 122         if (!(p = strsep(&bp, ":")))                    /* expire */
 123                 goto fmt;
 124         pw->pw_expire = atol(p);
 125         pw->pw_gecos = strsep(&bp, ":");                /* gecos */
 126         pw->pw_dir = strsep(&bp, ":");                  /* directory */
 127         if (!(pw->pw_shell = strsep(&bp, ":")))         /* shell */
 128                 goto fmt;
 129
 130         p = pw->pw_shell;
 131         if (root && *p)                                 /* empty == /bin/sh */
 132                 for (setusershell();;) {
 133                         if (!(sh = getusershell())) {
 134                                 warnx("warning, unknown root shell");
 135                                 break;
 136                         }
 137                         if (!strcmp(p, sh))
 138                                 break;
 139                 }
 140
 141         if (p = strsep(&bp, ":")) {                     /* too many */
 142 fmt:            warnx("corrupted entry");
 143                 return (0);
 144         }
 145         return (1);
 146 }