#!/bin/sh
# /etc/rc.serial 
#	Initializes the serial ports on your system
#
# chkconfig: 2345 50 75
# description: This initializes the settings of the serial port
#
# FILE_VERSION: 19981128
#
# Distributed with setserial and the serial driver.  We need to use the
# FILE_VERSION field to assure that we don't overwrite a newer rc.serial 
# file with an older one.
# 
# XXXX For now, the autosave feature doesn't work if you are
# using the multiport feature; it doesn't save the multiport configuration
# (for now).  Autosave also doesn't work for the hayes devices.  
#

RCLOCKFILE=/var/lock/subsys/serial
DIRS="/lib/modules/$(uname -r)/misc /lib/modules /usr/lib/modules ."
PATH=/bin:/sbin:/usr/bin
DRIVER=serial
DRIVER_NAME=serial
MODULE_REGEXP="serial\b"

ALLDEVS="/dev/ttyS?"
if /bin/ls /dev/ttyS?? >& /dev/null ; then
	ALLDEVS="$ALLDEVS /dev/ttyS??"
fi

SETSERIAL=""
if [ -x /bin/setserial ]; then
	SETSERIAL=/bin/setserial
elif [ -x /sbin/setserial ]; then
	SETSERIAL=/sbin/setserial
fi

#
# See if the serial driver is loaded
#
LOADED=""
if [ -f /proc/devices ]; then
  [ grep -q " ttyS$" /proc/devices ] && LOADED="yes" || LOADED="no"
fi

#
# Find the serial driver
#
for i in $DIRS
do
  [ -z "$MODULE" -a -f $i/$DRIVER.o ] && MODULE=$i/$DRIVER.o
done

  [ ! -f /proc/modules ] && MODULE=""

#
# Handle System V init conventions...
#
case $1 in
start)
	action="start";
	;;
stop)
	action="stop";
	;;
*)
	action="start";
esac

if [ "$action" = 'stop' ]; then
	if [ "$SETSERIAL" -a "$LOADED" != "no" -a \
           $(head -1 /etc/serial.conf) = '###AUTOSAVE###' ]; then
		echo -n "Saving state of serial devices... "
		grep "^#" /etc/serial.conf > /etc/.serial.conf.new
		$SETSERIAL -G -g ${ALLDEVS} >> /etc/.serial.conf.new
		mv /etc/serial.conf /etc/.serial.conf.old
		mv /etc/.serial.conf.new /etc/serial.conf
		echo "done."
	fi
	if [ "$MODULE" ]; then
		module=$(grep $MODULE_REGEXP /proc/modules | awk '{print $1}')
		if [ ! "$module" ]; then
			echo "The $DRIVER_NAME driver is not loaded."
			rm -f ${RCLOCKFILE}
			exit 0
		fi
		modprobe -r $module 2>/dev/null
                if [ $? -ne 0 ]; then
			echo "The $DRIVER_NAME driver could NOT be unloaded."
			exit 1;
                 else
		        echo "The $DRIVER_NAME driver has been unloaded."
                fi
	fi
	rm -f ${RCLOCKFILE}
	exit 0
fi

#
# If not stop, it must be a start....
#

if [ "$MODULE" -a "$LOADED" != "yes" ]; then
	modprobe $MODULE $DRIVER_ARG 2>/dev/null
  if [ $? -ne 0 ]; then
        echo "Couldn't load $DRIVER_NAME driver."
        exit 1
  fi
fi

if [ -f /etc/serial.conf ]; then
        if [ "$SETSERIAL" ]; then
		grep -v ^# < /etc/serial.conf | while read device args
		do
                    if [ "$device" -a "$args" ]; then
                        $SETSERIAL -z $device $args
                    fi
		done 
	fi
else
	echo "###AUTOSAVE###" > /etc/serial.conf
fi

touch ${RCLOCKFILE}
$SETSERIAL -bg ${ALLDEVS}