IDcheck.sh

   1 #!/bin/sh
   2 #
   3 #    Copyright (c) International Business Machines  Corp., 2001
   4 #
   5 #    This program is free software;  you can redistribute it and/or modify
   6 #    it under the terms of the GNU General Public License as published by
   7 #    the Free Software Foundation; either version 2 of the License, or
   8 #    (at your option) any later version.
   9 #
  10 #    This program is distributed in the hope that it will be useful,
  11 #    but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13 #    the GNU General Public License for more details.
  14 #
  15 #    You should have received a copy of the GNU General Public License
  16 #    along with this program;  if not, write to the Free Software
  17 #    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18 #
  19 #   FILE        : IDcheck.sh
  20 #   DESCRIPTION : checks for req'd users/groups and will create them if requested.
  21 #   HISTORY     : see the cvs log
  22 #
  23
  24 # debian is good enough
  25
  26 exit 0
  27
  28 # Prompt user if ids/groups should be created
  29 echo "Checking for required user/group ids"
  30 echo ""
  31
  32 # Check ids and create if needed.
  33 NO_NOBODY_ID=1
  34 NO_BIN_ID=1
  35 NO_DAEMON_ID=1
  36 NO_NOBODY_GRP=1
  37 NO_BIN_GRP=1
  38 NO_DAEMON_GRP=1
  39 NO_USERS_GRP=1
  40 NO_SYS_GRP=1
  41
  42 group="$DESTDIR/etc/group"
  43 passwd="$DESTDIR/etc/passwd"
  44
  45 # find entry.
  46 fe() {
  47     ID=$1; shift
  48     FILE=$1; shift
  49     [ -e "$FILE" ] || return $?
  50     awk "/^$ID:/ { FOUND=1 } END { if (\$FOUND == 1) { exit 1; } exit 0; }" \
  51     "$FILE"
  52 }
  53
  54 prompt_for_create() {
  55         if [ -z "$CREATE_ENTRIES" ] ; then
  56
  57                 if [ $NO_NOBODY_ID -ne 0 -o $NO_BIN_ID -ne 0 -o $NO_DAEMON_ID -ne 0 -o $NO_NOBODY_GRP -ne 0 -o $NO_BIN_GRP -ne 0 -o $NO_DAEMON_GRP -ne 0 -o $NO_USERS_GRP -ne 0 -o $NO_SYS_GRP -ne 0 ] ; then
  58                         echo -n "If any required user ids and/or groups are missing, would you like these created? [y/N]"
  59                         read ans
  60                         case "$ans" in
  61                                 Y*|y*) CREATE_ENTRIES=1 ;;
  62                                 *)     CREATE_ENTRIES=0 ;;
  63                         esac
  64                 else
  65                         CREATE_ENTRIES=0
  66                 fi
  67
  68         fi
  69 }
  70
  71 if [ -z ${EUID} ] ; then
  72         EUID=$(id -u)
  73 fi
  74
  75 for i in "$passwd" "$group"; do
  76     if [ -e "$i" -a ! -r "$i" ] ; then
  77         echo "$i not readable by uid $EUID"
  78         exit 1
  79     fi
  80 done
  81
  82 fe bin "$passwd"; NO_BIN_ID=$?
  83 fe daemon "$passwd"; NO_DAEMON_ID=$?
  84 fe nobody "$passwd"; NO_NOBODY_ID=$?
  85
  86 fe bin "$group"; NO_BIN_GRP=$?
  87 fe daemon "$group"; NO_DAEMON_GRP=$?
  88 fe nobody "$group"; NO_NOBODY_GRP=$?
  89 fe sys "$group"; NO_SYS_GRP=$?
  90 fe users "$group"; NO_USERS_GRP=$?
  91
  92 prompt_for_create
  93
  94 debug_vals() {
  95
  96 echo "Missing the following group / user entries:"
  97 echo "Group file:    $group"
  98 echo "Password file: $passwd"
  99 echo "nobody:        $NO_NOBODY_ID"
 100 echo "bin:           $NO_BIN_ID"
 101 echo "daemon:        $NO_DAEMON_ID"
 102 echo "nobody grp:    $NO_NOBODY_GRP"
 103 echo "bin grp:       $NO_BIN_GRP"
 104 echo "daemon grp:    $NO_DAEMON_GRP"
 105 echo "sys grp:       $NO_SYS_GRP"
 106 echo "users grp:     $NO_USERS_GRP"
 107 echo ""
 108
 109 }
 110
 111 #debug_vals
 112
 113 if [ $CREATE_ENTRIES -ne 0 ] ; then
 114     if ! touch "$group" "$passwd" 2>/dev/null; then
 115         echo "Failed to touch $group or $passwd"
 116         exit 1
 117     fi
 118 fi
 119
 120 make_user_group() {
 121         local name=$1 id=$2 no_id=$3 no_grp=$4
 122
 123         if [ $no_id -eq 0 -a $no_grp -eq 0 ] ; then
 124                 echo "'$name' user id and group found."
 125         elif [ $CREATE_ENTRIES -ne 0 ] ; then
 126                 echo "Creating entries for $name"
 127
 128                 # Avoid chicken and egg issue with id(1) call
 129                 # made above and below.
 130                 if ! fe "$name" "$passwd" && [ $no_id -ne 0 ] ; then
 131                         echo "${name}:x:${id}:${id}:${name}::" >> "$passwd"
 132                 fi
 133                 if [ $no_grp -ne 0 ] ; then
 134                         echo "${name}:x:$(id -u ${name}):" >> "$group"
 135                 fi
 136         fi
 137 }
 138 make_user_group nobody 99 $NO_NOBODY_ID $NO_NOBODY_GRP
 139 make_user_group bin 1 $NO_BIN_ID $NO_BIN_GRP
 140 make_user_group daemon 2 $NO_DAEMON_ID $NO_DAEMON_GRP
 141
 142 if [ $NO_USERS_GRP -eq 0 ] ; then
 143         echo "Users group found."
 144 elif [ $CREATE_ENTRIES -ne 0 ] ; then
 145         echo 'users:x:100:' >> "$group"
 146 fi
 147
 148 if [ $NO_SYS_GRP -eq 0 ] ; then
 149         echo "Sys group found."
 150 elif [ $CREATE_ENTRIES -ne 0 ] ; then
 151         echo 'sys:x:3:' >> "$group"
 152 fi
 153
 154 MISSING_ENTRY=0
 155
 156 # For entries that exist in both $group and $passwd.
 157 for i in nobody bin daemon; do
 158     for file in "$group" "$passwd"; do
 159         if ! fe "$i" "$file"; then
 160             MISSING_ENTRY=1
 161             break
 162         fi
 163     done
 164     if [ $MISSING_ENTRY -ne 0 ]; then
 165         break
 166     fi
 167 done
 168
 169 # For entries that only exist in $group.
 170 for i in users sys; do
 171     if ! fe "$i" "$file"; then
 172         MISSING_ENTRY=1
 173     fi
 174 done
 175
 176 if [ $MISSING_ENTRY -eq 0 ] ; then
 177     echo "Required users/groups exist."
 178     exit 0
 179 fi
 180
 181 echo ""
 182 echo "*****************************************"
 183 echo "* Required users/groups do NOT exist!!! *"
 184 echo "*                                       *"
 185 echo "* Some kernel/syscall tests will FAIL!  *"
 186 echo "*****************************************"
 187 exit 1