#!/bin/sh
#
# file:         rpm2tar (after rpm2tgz)
# machine:      wincrap
# modified:     pasha may 20 2006
# modification: replaced functions library
#

# 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.
#


function do_with_echo () 
{
	echo "$ME: doing $1"
	$1
	if [ $? != 0 ]; then
		echo $ME: $1 returned error\; aborting
		exit 1 
	fi
}

ME=`basename $0`

if [ "$1" = "" ]; then
  echo "$ME: converts RPM format to tar."
  echo "Usage: $ME <file.rpm>"
  echo "       (Outputs \"file.tar\")"
  exit 1;
fi

BASE=`basename $1 .rpm`
BASE_TAR=$BASE.tar
BASE_CPIO=$BASE.cpio

if [ -f $BASE_TAR ]; then
    echo "$ME: $BASE_TAR exists"
    exit 1
fi	

TMPDIR=/tmp/$ME$$

rm -rf $TMPDIR           # clear the way, just in case of mischief
do_with_echo "mkdir $TMPDIR"

echo "$ME: doing dd and producing .cpio"
dd ibs=`rpmoffset < $1` skip=1 if=$1 | gzip -dc > $TMPDIR/$BASE_CPIO

( 
    cd $TMPDIR 1>&2
    echo "$ME: doing cpio" 1>&2
    cpio --extract --preserve-modification-time --make-directories < $BASE_CPIO 1>&2
    rm -f $BASE_CPIO 1>&2
    echo "$ME: doing find and chmoding everything" 1>&2
    find . -type d -perm 700 -exec chmod 755 {} \; 1>&2
    echo "$ME: doing tar" 1>&2
    tar cf - . 
) > $BASE_TAR

echo "$ME: removing .rpm"
if [ "$?" == "0" ]; then
    rm $1 || echo "$ME: unable remove $1"
fi
rm -rf $TMPDIR || echo "$ME: unable remove $TMPDIR, leaving garbage"


# end of rpm2tar