#!/bin/sh

set -e
[ "$DEBIAN_SCRIPT_DEBUG" ] && set -x

. /usr/share/carnet-tools/functions.sh

PKG=amavisd-cn
MAILDIR=/etc/mail
ALIASES=/etc/aliases
sendmail_cf=$MAILDIR/sendmail.cf
sendmail_mc=$MAILDIR/sendmail.mc
submit_mc=$MAILDIR/submit.mc
ct_file=$MAILDIR/trusted-users
main_cf=/etc/postfix/main.cf
master_cf=/etc/postfix/master.cf

del_postconf() {
  egrep -v "^$1[[:blank:]]*=[[:blank:]]*" $main_cf > $main_cf.dpkg-tmp.$$
  cp_mv $main_cf.dpkg-tmp.$$ $main_cf
}

if [ "$1" = remove ]; then
  # sendmail?
  if grep -q $PKG $sendmail_mc $submit_mc 2>&- || \
     grep -q '^amavis$' $ct_file 2>&- ; then
    echo "Removing sendmail configuration for ${PKG}... "
    cp-update -r -c dnl $PKG $sendmail_mc >&-
    cp-update -r -c dnl $PKG $submit_mc >&-
    grep -v '^amavis$' $ct_file > ${ct_file}.dpkg-tmp.$$ || true
    cp_mv ${ct_file}.dpkg-tmp.$$ $ct_file
    make -C /etc/mail 2>&1 | grep -v 'issue .*/etc/init.d/sendmail reload' 1>&2 || true
    echo "Removed sendmail configuration for ${PKG}."
    if pgrep -u root -f 'sendmail: MTA: accepting connections' >&- ; then
      /etc/init.d/sendmail reload
      if ! pgrep -u root -f 'sendmail: MTA: accepting connections' >&- ; then
        echo 'CN: Something bad happened to sendmail on reload!' 1>&2
        exit 1
      fi
      # Everything went well, apparently.  Remove old backup files.
      rm -f $sendmail_cf.$PKG
      rm -f $sendmail_mc.$PKG
      rm -f $submit_mc.$PKG
    fi
  fi
  # postfix?
  if grep -q $PKG $master_cf; then
    cp-update -r $PKG $master_cf >&-
    del_postconf content_filter
    echo "Removed postfix configuration for ${PKG}."
    if pgrep -u root -f /usr/lib/postfix/master >&- && \
       [ -x /etc/init.d/postfix ] >&- ; then
      /etc/init.d/postfix restart
    fi
  fi
  cp-update -r $PKG $ALIASES >&-
  newaliases
fi