#!/bin/sh
#
#     System startup script for XSP2
#     Copyright (C) 1995--2005  Kurt Garloff, SUSE / Novell Inc.
#          
#     This library is free software; you can redistribute it and/or modify it
#     under the terms of the GNU Lesser General Public License as published by
#     the Free Software Foundation; either version 2.1 of the License, or (at
#     your option) any later version.
#			      
#     This library 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
#     Lesser General Public License for more details.
#      
#     You should have received a copy of the GNU Lesser General Public
#     License along with this library; if not, write to the Free Software
#     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
#     USA.
#
# System startup script for XSP2
#
# LSB compatible service control script; see http://www.linuxbase.org/spec/
# 
# Note: This template uses functions rc_XXX defined in /etc/rc.status on
# UnitedLinux/SUSE/Novell based Linux distributions. If you want to base your
# script on this template and ensure that it works on non UL based LSB 
# compliant Linux distributions, you either have to provide the rc.status
# functions from UL or change the script to work without them.
# See skeleton.compat for a template that works with other distros as well.
#
### BEGIN INIT INFO
# Provides:          xsp2
# Required-Start:    $syslog $remote_fs $local_fs $network
# Should-Start: $time ypbind smtp
# Required-Stop:     $syslog $remote_fs
# Should-Stop: $time ypbind smtp
# Default-Start:     3 5
# Default-Stop:      0 1 2 6
# Short-Description: xsp2 daemon providing ASP.NET hosting
# Description:       Start xsp2 to run ASP.NET applications with
#   the Mono runtime.
### END INIT INFO
# 
# Any extensions to the keywords given above should be preceeded by 
# X-VendorTag- (X-UnitedLinux- X-SuSE- for us) according to LSB.
# 
# Notes on Required-Start/Should-Start:
# * There are two different issues that are solved by Required-Start
#    and Should-Start
# (a) Hard dependencies: This is used by the runlevel editor to determine
#     which services absolutely need to be started to make the start of
#     this service make sense. Example: nfsserver should have
#     Required-Start: $portmap
#     Also, required services are started before the dependent ones.
#     The runlevel editor will warn about such missing hard dependencies
#     and suggest enabling. During system startup, you may expect an error,
#     if the dependency is not fulfilled.
# (b) Specifying the init script ordering, not real (hard) dependencies.
#     This is needed by insserv to determine which service should be
#     started first (and at a later stage what services can be started
#     in parallel). The tag Should-Start: is used for this.
#     It tells, that if a service is available, it should be started
#     before. If not, never mind.
# * When specifying hard dependencies or ordering requirements, you can 
#   use names of services (contents of their Provides: section)
#   or pseudo names starting with a $. The following ones are available
#   according to LSB (1.1):
#	$local_fs		all local file systems are mounted
#				(most services should need this!)
#	$remote_fs		all remote file systems are mounted
#				(note that /usr may be remote, so
#				 many services should Require this!)
#	$syslog			system logging facility up
#	$network		low level networking (eth card, ...)
#	$named			hostname resolution available
#	$netdaemons		all network daemons are running
#   The $netdaemons pseudo service has been removed in LSB 1.2.
#   For now, we still offer it for backward compatibility.
#   These are new (LSB 1.2):
#	$time			the system time has been set correctly	
#	$portmap		SunRPC portmapping service available
#   UnitedLinux extensions:
#	$ALL			indicates that a script should be inserted
#				at the end
# * The services specified in the stop tags 
#   (Required-Stop/Should-Stop)
#   specify which services need to be still running when this service
#   is shut down. Often the entries there are just copies or a subset 
#   from the respective start tag.
# * Should-Start/Stop are now part of LSB as of 2.0,
#   formerly SUSE/Unitedlinux used X-UnitedLinux-Should-Start/-Stop.
#   insserv does support both variants.
# * X-UnitedLinux-Default-Enabled: yes/no is used at installation time
#   (%fillup_and_insserv macro in %post of many RPMs) to specify whether
#   a startup script should default to be enabled after installation.
#   It's not used by insserv.
#
# Note on runlevels:
# 0 - halt/poweroff 			6 - reboot
# 1 - single user			2 - multiuser without network exported
# 3 - multiuser w/ network (text mode)  5 - multiuser w/ network and X11 (xdm)
# 
# Note on script names:
# http://www.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/scrptnames.html
# A registry has been set up to manage the init script namespace.
# http://www.lanana.org/
# Please use the names already registered or register one or use a
# vendor prefix.


# Check for missing binaries (stale symlinks should not happen)
# Note: Special treatment of stop for LSB conformance
XSP2_BIN=/usr/lib/mono/2.0/xsp2.exe
XSP2_WRAPPER=/usr/bin/xsp2
MONO_BIN=/usr/bin/mono
test -x $XSP2_BIN || { echo "$XSP2_BIN not installed"; 
	if [ "$1" = "stop" ]; then exit 0;
	else exit 5; fi; }
test -x $MONO_BIN || { echo "$MONO_BIN not installed"; 
	if [ "$1" = "stop" ]; then exit 0;
	else exit 5; fi; }

# Check for existence of needed config file and read it
XSP2_CONFIG=/etc/sysconfig/xsp2
test -r $XSP2_CONFIG || { echo "$XSP2_CONFIG does not exist";
	if [ "$1" = "stop" ]; then exit 0;
	else exit 6; fi; }

# Defaults
XSP_PORT="8080"
XSP_ADDRESS="0.0.0.0"
XSP_APPCONFIGDIR="/etc/xsp/2.0/applications-enabled/"
XSP_DEBUG="no"
XSP_ROOTDIR="/srv/xsp2"
XSP_USER="wwwrun"
XSP_GROUP="www"

# Read config	
. $XSP2_CONFIG

XSP_ROOTAPP="--applications /:$XSP_ROOTDIR"
XSP_OPTIONS="--nonstop --port $XSP_PORT --address $XSP_ADDRESS $XSP_ROOTAPP --appconfigdir $XSP_APPCONFIGDIR --root $XSP_ROOTDIR $XSP_EXTRA_OPTIONS"
XSP_PIDFILE=/var/run/xsp2/xsp2.pid

if test "x$XSP_DEBUG" = "xyes"; then
    MONO_OPTIONS="$MONO_OPTIONS --debug"
fi

# Source LSB init functions
# providing start_daemon, killproc, pidofproc, 
# log_success_msg, log_failure_msg and log_warning_msg.
# This is currently not used by UnitedLinux based distributions and
# not needed for init scripts for UnitedLinux only. If it is used,
# the functions from rc.status should not be sourced or used.
#. /lib/lsb/init-functions

# 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     be verbose in local rc status and clear it afterwards
#      rc_status -v -r  ditto and clear both the local and overall 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 both the local and overall rc status
#      rc_exit          exit appropriate to overall rc status
#      rc_active        checks whether a service is activated by symlinks
. /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 xsp2 "
	## Start daemon with startproc(8). If this fails
	## the return value is set appropriately by startproc.
	export MONO_OPTIONS
	
	if [ -f "$XSP_PIDFILE" ] && [ "$(readlink /proc/$(cat $XSP_PIDFILE)/exe)" == "$MONO_BIN" ]; then
		rc_check 0
	else
		/sbin/startproc -p $XSP_PIDFILE -l /var/log/xsp2.log -u $XSP_USER -g $XSP_GROUP $XSP2_WRAPPER $XSP_OPTIONS --pidfile $XSP_PIDFILE
		# Wait for it to warm up
		sleep 1
	fi
	
	if [ -f "$XSP_PIDFILE" ]; then
		MYPID=$(cat $XSP_PIDFILE)
	else
		MYPID=
	fi
	
	if ! test "`readlink /proc/$MYPID/exe`" = "$MONO_BIN"; then
	    rc_failed 7
	fi

	# Remember status and be verbose
	rc_status -v
	;;
    stop)
	echo -n "Shutting down xsp2 "
	if test -f $XSP_PIDFILE; then
	    MYPID=`cat $XSP_PIDFILE`
	    if test "`readlink /proc/$MYPID/exe`" = "$MONO_BIN"; then
		kill -TERM $MYPID
	    else
		rc_failed 7
	    fi
	    rm -f $XSP_PIDFILE
	else
	    rc_failed 7
	fi

	# Remember status and be verbose
	rc_status -v
	;;
    try-restart|condrestart)
	## Do a restart only if the service was active before.
	## Note: try-restart is now part of LSB (as of 1.9).
	## RH has a similar command named condrestart.
	if test "$1" = "condrestart"; then
		echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
	fi
	$0 status
	if test $? = 0; then
		$0 restart
	else
		rc_reset	# Not running is not a failure.
	fi
	# Remember status and be quiet
	rc_status
	;;
    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 the service if it
	## is running.

	echo -n "Reload service xsp2 "
	## if it supports it:
	#/sbin/killproc -HUP $XSP2_BIN
	#touch /var/run/xsp2.pid
	#rc_status -v

	## Otherwise:
	$0 try-restart
	rc_status
	;;
    reload)
	## Like force-reload, but if daemon does not support
	## signaling, do nothing (!)

	# If it supports signaling:
	echo -n "Reload service xsp2 "
	#/sbin/killproc -HUP $XSP2_BIN
	#touch /var/run/xsp2.pid
	#rc_status -v
	
	## Otherwise if it does not support reload:
	rc_failed 3
	rc_status -v
	;;
    status)
	echo -n "Checking for service xsp2 "
	## 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 -p $XSP_PIDFILE $MONO_BIN
	# NOTE: rc_status knows that we called this init script with
	# "status" option and adapts its messages accordingly.
	rc_status -v
	;;
    *)
	echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload}"
	exit 1
	;;
esac
rc_exit