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#! /bin/bash

#Need to be copied to hooks/<HOOKS_VER>/stop/pre

#TODO: All gluster and samba paths are assumed for fedora like systems.
#Some efforts are required to make it work on other distros.

#The preferred way of creating a smb share of a gluster volume has changed.
#The old method was to create a fuse mount of the volume and share the mount
#point through samba.
#
#New method eliminates the requirement of fuse mount and changes in fstab.
#glusterfs_vfs plugin for samba makes call to libgfapi to access the volume.
#
#This hook script automagically removes shares for volume on every volume stop
#event by removing the volume related entries(if any) in smb.conf file.

PROGNAME="Ssamba-stop"
OPTSPEC="volname:"
VOL=
CONFIGFILE=
PIDDIR=

function parse_args () {
        ARGS=$(getopt -l $OPTSPEC  -name $PROGNAME $@)
        eval set -- "$ARGS"

        while true; do
        case $1 in
        --volname)
         shift
         VOL=$1
         ;;
        *)
         shift
         break
         ;;
        esac
        shift
        done
}

function find_config_info () {
        cmdout=`smbd -b | grep smb.conf`
        if [ $? -ne 0 ];then
                echo "Samba is not installed"
                exit 1
        fi
        CONFIGFILE=`echo $cmdout | awk {'print $2'}`
        PIDDIR=`smbd -b | grep PIDDIR | awk {'print $2'}`
}

function del_samba_share () {
        volname=$1
        sed -i "/\[gluster-$volname\]/,/^$/d" ${CONFIGFILE}
}

function sighup_samba () {
        pid=`cat ${PIDDIR}/smbd.pid`
        if [ "x$pid" != "x" ]
        then
                kill -HUP $pid;
        else
                /etc/init.d/smb condrestart
        fi
}

parse_args $@
find_config_info
del_samba_share $VOL
sighup_samba