#!/bin/sh
#
#  check_mailscanner
#
#  $Id: check_mailscanner 3838 2007-01-31 11:22:37Z sysjkf $
#
#  Script to check whether mailscanner process is running, and
#  start it up if not.
#
#  Copyright (C) 2002  Julian Field, Nick Phillips
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#   The author, Julian Field, can be contacted by email at
#      Jules@JulianField.net
#   or by paper mail at
#      Julian Field
#      Dept of Electronics & Computer Science
#      University of Southampton
#      Southampton
#      SO17 1BJ
#      United Kingdom
#

# Check that the virus scanner is still running.
# Re-start it if necessary.
# This can also be used from the init script to
# start it in the first place.
# This can be called with a "-q" command-line option so that it is quiet
# unless MailScanner actually had to be started.

process=MailScanner
msbindir=/opt/MailScanner/bin
config=/opt/MailScanner/etc/MailScanner.conf

# These seem to get put all over the shop...
PATH=/usr/bin:/bin
export PATH
PERL=perl
AWK=awk
GREP=grep
FGREP=fgrep
EGREP=egrep
PS=ps
UNAME='uname -a'

#TAINTWARN='-Tw'
TAINTWARN=

RETVALUE=" Done."
# If this does not work on your system, please don't
# just send us a version that does, please please please
# send example output that demonstrates *why* it doesn't
# work, what version of what system you are running etc.
# If you do this then I *will* make this work right for
# everybody.
# -- Nick Phillips <nwp@lemon-computing.com>

if $UNAME | $FGREP "SunOS" >/dev/null ; then
    # Version for Solaris/SysV systems:
    pid=`/usr/ucb/ps auxww |
         egrep $msbindir/$process'|'$process'[:]' |
         grep -v grep |
         awk '{print $2}'`
elif $UNAME | $FGREP "HP" >/dev/null ; then
    # Version for HP-UX
    pid=`ps -efx |
         fgrep $msbindir/$process |
         fgrep -v fgrep |
         awk '{print $2}'`
elif $UNAME | $FGREP "SCO" >/dev/null ; then
    pid=`ps -e -o pid -o args |
         fgrep $msbindir/$process |
         grep -v grep |
         sed -e 's/^  *//' -e 's/ .*//'`
elif $UNAME | $FGREP "Linux" >/dev/null ; then
    pid=`$PS axww |
         $EGREP $process'[:]|\['$process'\]|[ ]'$msbindir/$process |
         awk '{ print $1 }'`
elif $UNAME | $FGREP "BSD" >/dev/null ; then
    pid=`$PS -axww |
         $EGREP '[ ]('$msbindir/$process')|'$process'[:]' |
         $AWK '{print $1}'`
elif $UNAME | $FGREP "OSF" >/dev/null ; then
    pid=`ps -e -o pid -o args |
	$GREP '[ ]'$process |
	grep -v grep |
	awk '{ print $1 }'`
elif $UNAME | $FGREP "Darwin" >/dev/null ; then # ie Mac OSX
    pid=`$PS axww |
	$EGREP '[ ]('$msbindir/$process')|'$process'[:]' |
	$AWK '{print $1}'`
else
    # not BSD; everything else seems to do POSIX
    pid=`COLUMNS=500 $PS -ef |
         $EGREP '([ ]'$msbindir/$process')|'$process'[:]' |
         $AWK '{print $2}'`
fi

# Make it run SpamAssassin out of tmpfs
if [ -d /dev/shm ]; then
  TMPDIR=/dev/shm
  export TMPDIR
fi

if [ "x$pid" = "x" ]; then
  # Quietly try to raise the open_files limit
  ulimit -n 2000 >/dev/null 2>&1
  # Restart it
  PATH=${msbindir}:$PATH
  echo -n 'Starting MailScanner...'
  cd $msbindir
  $process $config || RETVALUE=" Failed."
  echo "$RETVALUE"
else
  if [ "x$1" != "x-q" ]; then
    echo MailScanner running with pid $pid
  fi
fi