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
  14         local conf_file
  15         conf_file="$1"
  16         RET=1
  17
  18         if [ -f "$conf_file" ]; then
  19             if egrep -q "^## Begin - Generated by CARNet package mod-security-cn$" "$conf_file"; then
  20                 RET=0
  21             else
  22                 RET=2
  23             fi
  24         fi
  25 }
  26
  27
  28 case "$1" in
  29     remove|deconfigure)
  30
  31         # Include CARNet functions.
  32         . /usr/share/carnet-tools/functions.sh
  33
  34         PKG="mod-security-cn"
  35         A2DIR="/etc/apache2"
  36         CONFDIR="$A2DIR/conf.d"
  37         MODSECDIR="$A2DIR/mod-security"
  38         MODSECCONF="$MODSECDIR/mod-security-cn.conf"
  39         MODSECRBL="$MODSECDIR/rbl_lookup.conf"
  40         MODSECLNK="$CONFDIR/$(basename $MODSECCONF)"
  41
  42         need_restart=0
  43
  44
  45         # Disable ModSecurity configuration.
  46         chk_conf_tag "$MODSECCONF"
  47         if [ $RET -eq 0 ]; then
  48             if [ -e "$MODSECLNK" ]; then
  49                 cp_echo "CN: Disabling ModSecurity configuration."
  50                 rm -f "$MODSECLNK"
  51                 need_restart=1
  52             fi
  53         fi
  54
  55         # Remove configuration files generated by this CARNet package.
  56         for file in "$MODSECCONF" "$MODSECRBL"; do
  57             chk_conf_tag "$file"
  58             if [ $RET -eq 0 ]; then
  59                 cp_echo "CN: Removing configuration file $file"
  60                 rm -f $file
  61                 need_restart=1
  62             fi
  63         fi
  64
  65         # Restart Apache2 web server.
  66         if [ $need_restart -eq 1 ]; then
  67             if apache2ctl configtest 2>/dev/null; then
  68
  69                 # Restart Apache2 web server.
  70                 if [ -x "/etc/init.d/apache2" ]; then
  71                     if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
  72                         invoke-rc.d apache2 restart || true
  73                     else
  74                         /etc/init.d/apache2 restart || true
  75                     fi
  76                 fi
  77             else
  78                 # Something is broken.
  79                 cp_echo "CN: Your Apache2 configuration seem to be broken."
  80                 cp_echo "CN: Please, check the service configuration!"
  81             fi
  82         fi
  83
  84         # Mail root
  85         cp_mail "$PKG"
  86
  87         echo
  88         ;;
  89     upgrade|failed-upgrade)
  90         ;;
  91     *)
  92         echo "prerm called with unknown argument \$1'" >&2
  93         exit 0
  94         ;;
  95 esac
  96
  97 exit 0