mk/pkginstall/usergroup-check

   1 #!/bin/sh
   2 #
   3 # $NetBSD: usergroup-check,v 1.1 2006/05/21 23:50:15 jlam Exp $
   4 #
   5 # Copyright (c) 2006 The NetBSD Foundation, Inc.
   6 # All rights reserved.
   7 #
   8 # This code is derived from software contributed to The NetBSD Foundation
   9 # by Johnny C. Lam.
  10 #
  11 # Redistribution and use in source and binary forms, with or without
  12 # modification, are permitted provided that the following conditions
  13 # are met:
  14 # 1. Redistributions of source code must retain the above copyright
  15 #    notice, this list of conditions and the following disclaimer.
  16 # 2. Redistributions in binary form must reproduce the above copyright
  17 #    notice, this list of conditions and the following disclaimer in the
  18 #    documentation and/or other materials provided with the distribution.
  19 # 3. All advertising materials mentioning features or use of this software
  20 #    must display the following acknowledgement:
  21 #        This product includes software developed by the NetBSD
  22 #        Foundation, Inc. and its contributors.
  23 # 4. Neither the name of The NetBSD Foundation nor the names of its
  24 #    contributors may be used to endorse or promote products derived
  25 #    from this software without specific prior written permission.
  26 #
  27 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  28 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  31 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37 # POSSIBILITY OF SUCH DAMAGE.
  38 #
  39
  40 ######################################################################
  41 #
  42 # NAME
  43 #       usergroup-check -- verify that users/groups match numeric IDs
  44 #
  45 # SYNOPSIS
  46 #       usergroup-check -g [group_entry ...]
  47 #       usergroup-check -u [user_entry ...]
  48 #
  49 # DESCRIPTION
  50 #       usergroup-check checks for the existence of users and groups
  51 #       and verifies that they match the requested numeric IDs if
  52 #       given.  The group_entry format matches that of /etc/group and
  53 #       the user_entry format matches that of /etc/passwd, though the
  54 #       field contents may be empty.
  55 #
  56 #       usergroup-check exits 0 if the users and groups exist and match
  57 #       the numeric IDs, and >0 otherwise.
  58 #
  59 # OPTIONS
  60 #       The following command line arguments are supported.
  61 #
  62 #       -g      Indicates that the subsequent arguments are group entries.
  63 #
  64 #       -u      Indicates that the subsequent arguments are user entries.
  65 #
  66 ######################################################################
  67
  68 : ${PERL5=perl}
  69
  70 self="${0##*/}"
  71
  72 usage() {
  73         echo 1>&2 "usage: $self -g [group_entry ...]"
  74         echo 1>&2 "       $self -u [user_entry ...]"
  75 }
  76
  77 if test $# -lt 1; then
  78         usage; exit 1
  79 fi
  80
  81 check=
  82 case "$1" in
  83 -g)     check=groups ;;
  84 -u)     check=users ;;
  85 *)      usage; exit 1 ;;
  86 esac
  87 shift
  88
  89 missing_groups=
  90 missing_users=
  91
  92 case $check in
  93 groups)
  94         while test $# -gt 0; do
  95                 entry="$1"; shift
  96                 ( SAVEIFS="$IFS"; IFS=":"
  97                   set -- $entry; group="$1"; groupid="$2"
  98                   IFS="$SAVEIFS"
  99                   gid=`${PERL5} -le 'print scalar getgrnam shift' $group`
 100                   test -n "$gid" || exit 1
 101                   case "$groupid" in
 102                   ""|$gid)     exit 0 ;;
 103                   *)            exit 1 ;;
 104                   esac ) || missing_groups="$missing_groups $i"
 105         done
 106         ;;
 107
 108 users)
 109         missing_users=
 110         while test $# -gt 0; do
 111                 entry="$1"; shift
 112                 ( SAVEIFS="$IFS"; IFS=":"
 113                   set -- $entry; user="$1"; userid="$3"
 114                   IFS="$SAVEIFS"
 115                   gid=`${PERL5} -le 'print scalar getpwnam shift' $user`
 116                   test -n "$gid" || exit 1
 117                   case "$userid" in
 118                   ""|$gid)     exit 0 ;;
 119                   *)            exit 1 ;;
 120                   esac ) || missing_users="$missing_users $i"
 121         done
 122         ;;
 123 esac
 124
 125 test -z "$missing_groups" -a -z "$missing_users" || exit 1
 126 exit 0