xtar

#!/bin/bash

function usage() {
    echo "usage: $0 <dir>"
}

if [[ $# -ne 1 ]] || [[ -z $1 ]]; then
    usage
    exit -1
fi

DIR=${1%%.tar*}
TAR=${DIR}.tar.gz

if [[ ! -f $TAR ]]; then
    usage
    echo "not a file: $TAR"
    exit -1
fi

echo "Extracting $TAR"
echo "  into $DIR"

mkdir $DIR
tar --force-local --directory $DIR -xvf $TAR