#!/bin/sh

type=$1
shift

dir=`mktemp -d`
cd $dir

# Prepare test archive (hope paths will not be mangled).
# Assume that `mktemp` creates files in /tmp/ .
ln -s /tmp dir
abs=`mktemp`
rel=`mktemp`
link=`mktemp`

if [ "$type" = cpio ]; then
    echo "\
$abs
../`basename $rel`
dir
dir/`basename $link`" | cpio -o > arc 2> /dev/null
else
    tar -cPf arc $abs ../`basename $rel` dir dir/`basename $link`
fi
rm $abs $rel dir $link

# Extract
if [ "$type" = cpio ]; then
  "$@" < arc
else
  "$@" -f arc
fi 2> /dev/null

for file in $abs $rel $link; do
    if [ -f "$file" ]; then
        printf -- "x       "
        rm "$file"
    else
        printf -- "=       "
    fi
done
echo "$@"

cd - > /dev/null
rm -r $dir