#! /bin/sh
# Copyright 2000, International Business Machines Corporation and others.
# All Rights Reserved.
# 
# This software has been released under the terms of the IBM Public
# License.  For details, see the LICENSE file in the top-level source
# directory or online at http://www.openafs.org/dl/license10.html

# AFS	Start and stop AFS components
# 
# 
# chkconfig: 35 60 20
# description:  AFS is a distributed file system which provides location
#		transparency, caching and secure authentication.
#		Additional configuration can be done in the /etc/sysconfig/afs
#		file. Read the documentation in that file for more information.
#
# Note that AFS does not use a pid file in /var/run. It is turned off by
# unmounting /afs.


# check for special bootup functions
if [ -f /etc/rc.d/init.d/functions ] ; then
	. /etc/rc.d/init.d/functions
	afs_rh=1
else
	# special (RedHat) functions not available...
	# so I provide neccessary replacements (e.g. for SuSE)

	function echo_failure () { echo -n " - failed." ; }

	function echo_success () { echo -n " - successful." ; }

	# these are hopefully all functions I use...
fi

runcmd() {
   echo -n "$1 "
   shift
   if [ "$BOOTUP" = "color" ]; then
      $* && echo_success || echo_failure
   else
      $*
   fi
   echo
}

SYSCNF=/etc/sysconfig/afs
KERNEL_VERSION=`uname -r`

# Gather up options and post startup script name, if present
if [ -f $SYSCNF ] ; then
	. $SYSCNF
fi

CACHEINFO=${CACHEINFO:-/usr/vice/etc/cacheinfo}
CACHE=${CACHEDIR:-/usr/vice/cache}
AFS=${AFSDIR:-/afs}

# is_on returns 1 if value of arg is "on"
is_on() {
	if  test "$1" = "on" ; then return 0
	else return 1
        fi
}

on_network() {
    ADDRS=`LANG=C ifconfig -a | grep 'inet addr' | grep -v 127.0.0.1 | wc -l`
    if [ "$ADDRS" = "" ]; then
       echo afs: No interfaces with IP address 1>&2
       return 1
    elif [ $ADDRS = 0 ]; then
       echo afs: No interfaces with IP address 1>&2
       return 1
    fi
	#*******************************************
 	# Begin of modifications done by Troy Dawson
 	#*******************************************	
 	FOUNDSERVER="no"
 	FINISHED="no"
 	if ! [ -s /usr/vice/etc/ThisCell ] ; then
 		echo afs: ThisCell is empty or gone.  Not starting. 1>&2
 		return 1
 	fi
 	CELL="$(cat /usr/vice/etc/ThisCell)"
 	grep -w -q -s ">$CELL" /usr/vice/etc/CellServDB
 	if [ $? -ne 0 ] ; then
 		echo afs: $CELL from ThisCell is not in CellServDB.  Not starting. 1>&2
 		return 1
 	fi
 	cat /usr/vice/etc/CellServDB | {
 		while [ "$FINISHED" = "no" ] 
 		do
 			read line || break;
 			CHAR="$(echo $line | cut -c1)"
 			if [ "$CHAR" = ">" ] ; then
 				if [ "$FOUNDSERVER" = "yes" ] ; then
 					FINISHED="yes"
 				else
 					LINECELL="$(echo $line | cut -d' ' -f1 | cut -d'>' -f2)"
 					if [ "$CELL" = "$LINECELL" ] ; then
 						FOUNDSERVER="yes"
 					fi
 				fi
 			else
 				if [ "$FOUNDSERVER" = "yes" ] ; then
 					if [ "$line" = "" ] ; then
 						FINISHED="yes"
 					else
 						SERVER="$(echo $line | cut -d' ' -f1)"
 						/usr/sbin/rxdebug -servers $SERVER -port 7002 2>&1 > /dev/null
 						if [ $? -eq 0 ] ; then
 							return 0
 						fi
						echo "afs: Unable to reach $SERVER ..."
 					fi
 				fi
 			fi
 		done
 		echo afs: Unable to reach AFS servers. Not starting 1>&2
 		return 1
 	}
 	#*******************************************
 	# End of modifications done by Troy Dawson
 	#*******************************************    
    return 0
}


# load_client loads the AFS client module if it's not already loaded. 
load_client() {
	/sbin/modprobe libafs
}

generate_cacheinfo() {
    if [ "$CACHESIZE" = "AUTOMATIC" ]; then
	LINE=`df -k $CACHE | tail -1`
	PART=`echo $LINE | awk '{ if ( ($NF != "/usr")  && ($NF != "/") ) print $NF; else print "NONE";}'`
	if [ "$PART" = "NONE" ]; then
	    echo "$CACHE or /usr/vice is not a separate partition"
	    echo "you have to change the cachesize in $SYSCNF by hand"
	    echo "AFS will be started with a VERY small cache of 8Mb."
	    CACHESIZE=8000
	else
	    # Check to see if df has pretty-printed for long dev (i.e. LVM)
            FCHAR=`echo $LINE | cut -c 1`
            if [ "$FCHAR" = "/" ]; then
                PARTSIZE=`echo $LINE | awk '{print $2}'`
            else
                PARTSIZE=`echo $LINE | awk '{print $1}'`
	    fi
	    CACHESIZE=`echo $PARTSIZE | awk '{printf "%d",int(($1*.8)/1000)*1000}'`
	fi
    fi
    if [ "x$CACHESIZE" != "x" ]; then
	echo $AFS:$CACHE:$CACHESIZE >$CACHEINFO
	chmod 0644 $CACHEINFO
    else
	CACHESIZE=`awk -F: '{print $3}' < $CACHEINFO`
    fi
}

choose_afsdoptions() {
	if [ -z "$OPTIONS" -o "$OPTIONS" = "AUTOMATIC" ]; then
		if [ $CACHESIZE -lt 131072 ]; then
			OPTIONS=$SMALL
		elif [ $CACHESIZE -lt 524288 ]; then
			OPTIONS=$MEDIUM
		elif [ $CACHESIZE -lt 1048576 ]; then
			OPTIONS=$LARGE
		elif [ $CACHESIZE -lt 2097152 ]; then
			OPTIONS=$XLARGE
		else
			OPTIONS=$XXLARGE
		fi
	fi
	AFSD_OPTIONS="$OPTIONS $VERBOSE"
	if is_on $ENABLE_AFSDB; then
		AFSD_OPTIONS="$AFSD_OPTIONS -afsdb"
	fi
	if is_on $ENABLE_DYNROOT; then
		AFSD_OPTIONS="$AFSD_OPTIONS -dynroot"
	fi
}

case "$1" in 
  start)
    if [ ! "$afs_rh" -o ! -f /var/lock/subsys/afs ]; then
        if [ `echo "$OPTIONS" | grep -c dynroot` = 0 ]; then
	    if ! is_on $ENABLE_DYNROOT; then
		on_network || exit 1
	    fi
        fi
	# Load kernel extensions
	if  load_client  ; then :
	else
		echo Failed to load AFS client, not starting AFS services.
		exit 1
	fi

	echo "Starting AFS services..... "
	# Start bosserver, it if exists
	if  is_on $AFS_SERVER && test -x /usr/afs/bin/bosserver  ; then
		/usr/afs/bin/bosserver 
		test "$afs_rh" && touch /var/lock/subsys/afs
	fi

	# Start AFS client
	if  is_on $AFS_CLIENT && test -x /usr/vice/etc/afsd  ; then
		generate_cacheinfo
		choose_afsdoptions
		/usr/vice/etc/afsd ${AFSD_OPTIONS}
		test "$afs_rh" && touch /var/lock/subsys/afs
		$AFS_POST_INIT
	fi
    fi
	;;

  stop)
    if [ ! "$afs_rh" -o -f /var/lock/subsys/afs ]; then
	# Stop AFS
	echo "Stopping AFS services..... "

	if  is_on $AFS_CLIENT  ; then
		if [ -x /usr/vice/etc/killafs ] ; then
			runcmd "Sending all processes using /afs the TERM signal ..." /usr/vice/etc/killafs TERM
			runcmd "Sending all processes using /afs the KILL signal ..." /usr/vice/etc/killafs KILL
		fi
		umount /afs
	fi

	if  is_on $AFS_SERVER && test -x /usr/bin/bos ; then
		echo "Stopping AFS bosserver"
		/usr/bin/bos shutdown localhost -localauth -wait
		killall -HUP bosserver
	fi

	/sbin/modprobe -r libafs

	rm -f /var/lock/subsys/afs
    fi
	;;

  restart)
	# Restart AFS
	$0 stop
	$0 start
	;;

  *)
	echo Usage: 'afs <start|stop|restart>'

esac

exit 0

action fool the Red Hat initscripts
