#! /bin/sh
# Copyright (C) 2018  James Pearson <jamesp@vicidial.com>    LICENSE: AGPLv2
# All rights reserved.
#
# Author: James Pearson <jamesp@vicidial.com
#
# /etc/init.d/homersips
#
### BEGIN INIT INFO
# Provides:          homersips
# Required-Start:    $network $remote_fs
# Should-Start:      mysql
# Required-Stop:     $network $remote_fs
# Should-Stop:       mysql
# Default-Start:     3 5
# Default-Stop:      0 1 2 6
# Short-Description: HomerSIPS
# Description:       Start OpenSIPS for HOMER SIP capture
### END INIT INFO

# Check for missing binaries (stale symlinks should not happen)
# Copy over new opensips binary for homersips if it exists
HOMERSIPS_BIN=/usr/sbin/homersips
OPENSIPS_BIN=/usr/sbin/opensips
OPENMD5=`md5sum ${OPENSIPS_BIN} | awk '{ print $1 }'`
HOMERMD5=`md5sum ${HOMERSIPS_BIN} | awk '{ print $1 }'`
if [ $OPENMD5 != $HOMERMD5 ]
then
echo "Copying new opensips binary to homersips"
cp $OPENSIPS_BIN $HOMERSIPS_BIN
chmod 755 $HOMERSIPS_BIN
fi
test -x $HOMERSIPS_BIN || exit 5

# Check for existence of needed config file and read it
HOMERSIPS_CONFIG=/etc/opensips/homer.cfg
test -r $HOMERSIPS_CONFIG || exit 6
#. $HOMERSIPS_CONFIG

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_status -s     display "skipped" and exit with status 3
#      rc_status -u     display "unused" and exit with status 3
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num>
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
#      rc_active	checks whether a service is activated by symlinks
#      rc_splash arg    sets the boot splash screen to arg (if active)
. /etc/rc.status

# Reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0	  - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

case "$1" in
    start)
	echo -n "Starting HomerSIPS "
	## Start daemon with startproc(8). If this fails
	## the return value is set appropriately by startproc.
	/sbin/startproc $HOMERSIPS_BIN -f $HOMERSIPS_CONFIG

	# Remember status and be verbose
	rc_status -v
	;;
    stop)
	echo -n "Shutting down HomerSIPS "
	## Stop daemon with killproc(8) and if this fails
	## killproc sets the return value according to LSB.
	/sbin/killproc -TERM $HOMERSIPS_BIN

	# Remember status and be verbose
	rc_status -v
	;;
    restart)
	## Stop the service and regardless of whether it was
	## running or not, start it again.
	$0 stop
	$0 start

	# Remember status and be quiet
	rc_status
	;;
    force-reload)
	## Signal the daemon to reload its config. Most daemons
	## do this on signal 1 (SIGHUP).
	## If it does not support it, restart.

	echo -n "Reload service OpenSIPS "
	## Otherwise:
	$0 stop  &&  $0 start

	# Remember status and be quiet
	rc_status
	;;
    reload)
	## Like force-reload, but if daemon does not support
	## signaling, do nothing (!)

	## Otherwise if it does not support reload:
	rc_failed 3

	# Remember status and be verbose
	rc_status -v
	;;
    status)
	echo -n "Checking for service HomerSIPS "
	## Check status with checkproc(8), if process is running
	## checkproc will return with exit status 0.

	# Return value is slightly different for the status command:
	# 0 - service up and running
	# 1 - service dead, but /var/run/  pid  file exists
	# 2 - service dead, but /var/lock/ lock file exists
	# 3 - service not running (unused)
	# 4 - service status unknown :-(
	# 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)
	
	# NOTE: checkproc returns LSB compliant status values.
	/sbin/checkproc $HOMERSIPS_BIN
	# NOTE: rc_status knows that we called this init script with
	# "status" option and adapts its messages accordingly.
	# Remember status and be verbose
	rc_status -v
	;;
    *)
	echo "Usage: $0 {start|stop|status|restart}"
	exit 1
	;;
esac
rc_exit