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
  40         need_restart=0
  41
  42
  43         # Disable ModSecurity configuration.
  44         chk_conf_tag "$MODSECCONF"
  45         if [ $RET -eq 0 ]; then
  46             if [ -e "$CONFDIR/mod-security-cn.conf" ]; then
  47                 cp_echo "CN: Disabling ModSecurity configuration."
  48                 rm -f "$CONFDIR/mod-security-cn.conf"
  49                 need_restart=1
  50             fi
  51         fi
  52
  53         # Remove configuration files generated by this CARNet package.
  54         for file in "$MODSECCONF" "$MODSECDIR/rbl_lookup.conf"; do
  55             chk_conf_tag "$file"
  56             if [ $RET -eq 0 ]; then
  57                 cp_echo "CN: Removing configuration file $file"
  58                 rm -f $file
  59                 need_restart=1
  60             fi
  61         fi
  62
  63         # Restart Apache2 web server.
  64         if [ $need_restart -eq 1 ]; then
  65             if apache2ctl configtest 2>/dev/null; then
  66
  67                 # Restart Apache2 web server.
  68                 if [ -x "/etc/init.d/apache2" ]; then
  69                     if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
  70                         invoke-rc.d apache2 restart || true
  71                     else
  72                         /etc/init.d/apache2 restart || true
  73                     fi
  74                 fi
  75             else
  76                 # Something is broken.
  77                 cp_echo "CN: Your Apache2 configuration seem to be broken."
  78                 cp_echo "CN: Please, check the service configuration!"
  79             fi
  80         fi
  81
  82         # Mail root
  83         cp_mail "$PKG"
  84
  85         echo
  86         ;;
  87     upgrade|failed-upgrade)
  88         ;;
  89     *)
  90         echo "prerm called with unknown argument \$1'" >&2
  91         exit 0
  92         ;;
  93 esac
  94
  95 exit 0