#!/bin/sh
#
# Modified by Han Boetes <han@mijncomputer.nl>, February 2005.
# Modified by Per Liden <per@fukt.bth.se>, November 2000.
#
# Copyright 1997, 1998 Patrick Volkerding, Moorhead, Minnesota USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

name=${0##*/}

if [ $# -eq 0 ]; then
    echo "usage: $name <file.rpm> [file2.rpm]..."
    exit 1
fi

TMP=${TMP:=/tmp}
returncode=0

# Create a temporary directory
if ! TMP_DIR=$(mktemp -d -p $TMP/); then
    exit 1
fi

for i in $*; do
    rm -rf $TMP_DIR/*

    if [ ! -r "$i" ]; then
	echo "$name: Error: file \"$i\" doesn't exist" >&2
	returncode=1
	continue
    fi

    set -- $(file $i)
    if [ "$2" != RPM ]; then
	echo "$name: Error: file \"$i\" is not an RPM" >&2
	returncode=1
	continue
    fi
    base_name=${i%.rpm}
    ofn=$base_name.cpio
    raw=$ofn.raw
    echo "Converting: $i to $base_name.tar.gz"
    dd ibs=$(/usr/lib/rpm2targz/rpmoffset < $i) skip=1 if=$i of=$TMP_DIR/$raw 2> /dev/null
    if file $TMP_DIR/$raw| grep bzip2\ compressed\ data; then
        bzip2 -dc < $TMP_DIR/$raw > $TMP_DIR/$ofn
    else
        gzip -dc < $TMP_DIR/$raw > $TMP_DIR/$ofn
    fi
    (
        cd $TMP_DIR
        rm -f $raw
        cpio \
            --quiet \
            --extract \
            --preserve-modification-time \
            --make-directories < $ofn
        rm -f $ofn
        find . -type d -perm 700 -exec chmod 755 {} \;
        tar cf - .
    ) | gzip > $base_name.tar.gz
done
rm -rf $TMP_DIR

if [ $returncode = 1 ]; then
    exit 1
fi