#!/bin/sh

# ***********  unwrap
# ***********  a shell script to ease unpacking several sorts of archives
# ***********  version 1.5 by scott arrington
VERSION=1.5

# you can choose between tar or cpio...
# the -L option to unzip unzips with lowercase filenames!

# 29 Dec 1998
#	added a handler for uncompressed tar files.  it uses tar, not cpio.
#	added a variable for version number, bumped version number.
#	it would be nice to have a "list" option, that would just show the 
#	contents of the archive without opening it.  
#	while we're on the wish list, rpm support might be helpful.
#
# 23 Feb 1999
#	added -l for listing mode, which required rearranging things.
#
# 23 Mar 1999
#	complains about an empty file list.  maybe no args should attempt
#	to read from stdin instead?

LISTONLY=

function unpack ()
{
	case "$1" in 
		*.tar.gz|*.tar.Z|*.tgz)
			#gzip -d < $1 | cpio -i -v -d -u -H ustar ;;
			gzip -d  < $1 | tar -xvf -
			;;

		*.tar.bz2|*.tbz)
			#bzip2 -d  < $1 | cpio -i -v -d -u -H ustar ;;
			bzip2 -d  < $1 | tar -xvf -
			;;

		*.tar)
			#cpio -i -v -d -u -H ustar $1 ;;
			tar -xvf $1 
			;;

		*.gz)
			gunzip -d $1
			;;

		*.zip)
			unzip -L $1 
			;;

		*)	# default
			echo  wrong file type for $1 ;
			echo " --- check for a '_' where there should be a '.'";
			echo " --- try 'unwrap --help' for help";;
	esac
}


function listcontents ()
{
	case "$1" in 
		*.tar.gz|*.tar.Z|*.tgz) gzip -d  < $1 | tar -tvf - ;; 
		*.tar.bz2|*.tbz) 	bzip2 -d  < $1 | tar -tvf - ;; 
		*.tar) 			tar -tvf $1 ;; 
		*.gz) 			gunzip -tvf $1 ;; 
		*.zip) 			unzip -L -l $1 ;;
		*)			echo  unrecognized file type for $1 ;;
	esac
}


#############################################################################
# the buck starts here

if [ $# = 0 ]; then
	echo "usage: unwrap filename"; 
	exit
fi

case "$1" in 
	-h|--help)
		echo "unwrap $VERSION by scott arrington";
		echo "unpack archives";
		echo "usage:  unwrap filename";
		echo "   supported archive types:";
		echo "     tar archives:            *.tar";
		echo "     gzipped tar archives:    *.tar.gz, *.tgz";
		echo "     compressed tar archives: *.tar.Z";
		echo "     bzipped tar archives:    *.tar.bz2, *.tbz";
		echo "     zip archives:            *.zip"
		echo "     gzip archives:           *.gz"
		;;
	-l|--list)
		LISTONLY=true;
		shift;
		;;
esac


while ! [ -z "$1" ]; do
	if [ "$LISTONLY" = "true" ]; then
		listcontents "$1"
	else
		unpack "$1"
	fi
	shift
done

# the buck stops here
#############################################################################