#!/bin/sh
# control starting, stopping, or restarting amd.
# usage: ctl-amd [start | stop | restart]
#
# Package:	am-utils-6.0
# Author:	Erez Zadok <ezk@cs.columbia.edu>

# set path
prefix=@prefix@
exec_prefix=@exec_prefix@
PATH=@sbindir@:@bindir@:/usr/ucb:/usr/bin:/bin:${PATH}
export PATH

# kill the named process(es)
killproc()
{
# first try to get PID via an amq RPC
pid=`amq -p 2>/dev/null`
if test "$pid" != ""
then
	kill $pid
	return 0
fi

# try bsd style ps
pscmd="ps axc"
pid=`${pscmd} 2>/dev/null | grep "$1" | sed -e 's/^  *//' -e 's/ .*//'`
if test "$pid" != ""
then
	kill $pid
	return 0
fi

# try bsd44 style ps
pscmd="ps -x"
pid=`${pscmd} 2>/dev/null | grep "$1" | sed -e 's/^  *//' -e 's/ .*//'`
if test "$pid" != ""
then
	kill $pid
	return 0
fi

# try svr4 style ps
pscmd="ps -e"
pid=`${pscmd} 2>/dev/null | grep "$1" | sed -e 's/^  *//' -e 's/ .*//'`
if test "$pid" != ""
then
	kill $pid
	return 0
fi

# failed
return 1
}

# search for amd.conf file
CF_FILE="${prefix}/etc/amd.conf"
# any local copy of the conf file overrides the "global" one
if [ -f /etc/amd.conf ]
then
	CF_FILE="/etc/amd.conf"
fi
if [ -f ${prefix}/etc/amd.conf ]
then
	CF_FILE="${prefix}/etc/amd.conf"
fi
if [ -f /etc/local/amd.conf ]
then
	CF_FILE="/etc/local/amd.conf"
fi

# if have the directory /tftpboot/.amd, then add a tag to include it
CF_TAG=""
if [ -d /tftpboot/.amd ]
then
	CF_TAG="-T tftpboot"
fi

case "$1" in
'start')
	#
	# Start the amd automounter.
	#
	if [ -x @sbindir@/amd ]
	then
		# do not specify full path of amd so killproc() works
		amd -F $CF_FILE $CF_TAG
	fi
	;;

'stop')
	# prepend space to program name to ensure only amd process dies
	killproc " amd"
	;;

'restart')
	# kill amd, wait for it to die, then restart
	echo "killing amd..."
	ctl-amd stop
	wait4amd2die
	if [ $? != 0 ]
	then
		echo "NOT restarting amd!"
	else
		echo "Restarting amd..."
		ctl-amd start
	fi
	;;

*)
	echo "Usage: @sbindir@/ctl-amd [ start | stop | restart ]"
	;;
esac