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removeit()
{
    FILEPATH=$LSWSHOME/$LSFILE.$NEWVER
    if [ -f $FILEPATH ] || [ -d $FILEPATH ]; then
        echo "Removing $FILEPATH"
        rm -rf $FILEPATH
    else
        if [ $LSFILE != "modules" ]; then
            echo "$FILEPATH does not exist."
        fi
    fi
}

testit()
{
    FILEPATH=$LSWSHOME/$LSFILE.$NEWVER
    if [ ! -f $FILEPATH ] && [ ! -d $FILEPATH ] && [ $LSFILE != "modules" ] && [ $LSFILE != "BUILD" ]; then
        echo "[ERROR] $FILEPATH does not exist, please run installer again."
        exit 3
    fi
}

switchit()
{
    FILEPATH=$LSWSHOME/$LSFILE
    if [ $LSFILE != "modules" ] || [ -d $FILEPATH.$NEWVER ]; then
        rm -f $FILEPATH
        FILENAME=`basename $FILEPATH`
        ln -sf "./$FILENAME.$NEWVER" "$FILEPATH"
    fi
}

CURDIR=`dirname "$0"`
cd $CURDIR
CURDIR=`pwd`
LSWSHOME=`dirname $CURDIR`
LSWSHOME=`dirname $LSWSHOME`


if [ "x-d" = "x$1" ]; then
    ACTION="del"
    shift
fi

if [ "x$1" = "x" ]; then
    
    cat <<EOF
Usage: mgr_ver.sh [-d] VERSION
  Switch to another version of LiteSpeed web server, or remove files installed.

Option:
  -d        Delete files installed for the version specified

EOF
    exit 1
else
    NEWVER=$1
fi

FILES="bin/lshttpd bin/lscgid bin/lswsctrl admin/html modules BUILD"


OLDVER=`cat $LSWSHOME/VERSION`

if [ "x$ACTION" = "xdel" ]; then
    if [ "x$OLDVER" = "x" ]; then
        echo "[ERROR] Can not find $LSWSHOME/VERSION, Please run"
        echo "mgr_ver.sh without '-d' option first to confirm the version to be used."
        exit 1
    elif [ "x$OLDVER" = "x$NEWVER" ]; then
        echo "[ERROR] Version: $NEWVER is in used, please switch to another verion first."
        exit 1
    else
        for LSFILE in $FILES 
          do
          removeit
        done
        exit 2
    fi        
fi

for LSFILE in $FILES 
  do
  testit
done

for LSFILE in $FILES
  do
  switchit
done

ln -sf "./lscgid.$NEWVER" "$LSWSHOME/bin/httpd"

echo "$NEWVER" > $LSWSHOME/VERSION
exit 0