debian/prerm

   1 #!/bin/sh
   2
   3 set -e
   4
   5 # chk_conf_tag ()
   6 #
   7 #   Check if configuration file has CARNet package info lines.
   8 #   return:  $RET => 0 - tagged
   9 #                    1 - file does not exists
  10 #                    2 - file exists, but it is not tagged
  11 #
  12 chk_conf_tag () {
  13     local conf_file
  14     conf_file="$1"
  15     RET=1
  16
  17     if [ -f "$conf_file" ]; then
  18         if egrep -q "^## Begin - Generated by CARNet package mod-security-cn$" "$conf_file"; then
  19             RET=0
  20         else
  21             RET=2
  22         fi
  23     fi
  24 }
  25
  26
  27 case "$1" in
  28     remove|deconfigure)
  29
  30         # Include CARNet functions.
  31         . /usr/share/carnet-tools/functions.sh
  32
  33         PKG="mod-security-cn"
  34         A2DIR="/etc/apache2"
  35         CONFDIR="$A2DIR/conf.d"
  36         MODSECDIR="$A2DIR/mod-security"
  37         MODSECCONF="$MODSECDIR/mod-security-cn.conf"
  38         MODSECRBL="$MODSECDIR/rbl_lookup.conf"
  39         MODSECLNK="$CONFDIR/$(basename $MODSECCONF)"
  40
  41         need_restart=0
  42
  43
  44         # Disable ModSecurity configuration.
  45         chk_conf_tag "$MODSECCONF"
  46         if [ $RET -eq 0 ]; then
  47             if [ -e "$MODSECLNK" ]; then
  48                 cp_echo "CN: Disabling ModSecurity configuration."
  49                 rm -f "$MODSECLNK"
  50                 need_restart=1
  51             fi
  52         fi
  53
  54         # Remove configuration files generated by this CARNet package.
  55         for file in "$MODSECCONF" "$MODSECRBL"; do
  56             chk_conf_tag "$file"
  57             if [ $RET -eq 0 ]; then
  58                 cp_echo "CN: Removing configuration file $file"
  59                 rm -f $file
  60                 need_restart=1
  61             fi
  62         done
  63
  64         # Restart Apache2 web server.
  65         if [ $need_restart -eq 1 ]; then
  66             if apache2ctl configtest 2>/dev/null; then
  67                 invoke-rc.d apache2 force-reload || true
  68             else
  69                 # Something is broken.
  70                 cp_echo "CN: Your Apache2 configuration seem to be broken."
  71                 cp_echo "CN: Please, check the service configuration!"
  72             fi
  73         fi
  74
  75         # Mail root
  76         cp_mail "$PKG"
  77
  78         echo
  79         ;;
  80     upgrade|failed-upgrade)
  81         ;;
  82     *)
  83         echo "prerm called with unknown argument \$1'" >&2
  84         exit 0
  85         ;;
  86 esac
  87
  88 #DEBHELPER#
  89
  90 exit 0