#!/bin/sh
# Copyright 1994,2002 David C. Niemi.
# Copyright 1996,1997,2001-2003,2010 Alain Knaff.
# This file is part of mtools.
#
# Mtools is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Mtools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Mtools. If not, see <http://www.gnu.org/licenses/>.
# uz [file...]
# lz [file...]
#
# If called "uz", gunzips and extracts a gzip'd tar'd archive.
# If called "lz", gunzips and shows a listing of a gzip'd tar'd archive.
#
# Requires: gzip and tar in the user's path. Should work with most tars.
# "-" is now used for backwards compatibility with antique tars, e.g. SCO.
#
# 1994/02/19 DCN Created (as a trivial, but useful script)
# 1994/12/01 DCN Combined uz and lz, added suffix handling
# 2002/09/11 DCN Added bzip2 support
# 2010/10/16 AKN Added lzip support
#
# Copyright (C) 1994, 2002 David C. Niemi (niemi at tuxers dot net)
# The author requires that any copies or derived works include this
# copyright notice; no other restrictions are placed on its use.
#
set -e
set -u
## Default unzipping command
uzcmd='gzip -cd'
case $0 in
*uz)
tarparam="-pxvf"
action="Extracting from "
;;
*lz)
tarparam="-tvf"
action="Reading directory of "
;;
*)
echo "$0: expect to be named either \"uz\" or \"lz\"." >&2
exit 1
;;
esac
if [ $# = 0 ]; then
echo "$action standard input." >&2
$uzcmd - | tar "$tarparam" -
exit 0
fi
while [ $# -ge 1 ]; do
echo >&2
found=
for suffix in "" .gz .tgz .tar.gz .z .tar.z .taz .tpz .Z .tar.Z .tar.bz2 tar.lz ; do
if [ -r "${1}$suffix" ]; then
found=$1$suffix
break
fi
done
case $found in
*.tar.bz2 | *.tb2)
uzcmd='bzip2 -cd'
;;
*.tar.lz)
uzcmd='lzip -cd'
;;
esac
if [ -z "$found" ]; then
echo "$0: could not read \"$1\"." >&2
else
echo "$action \"$found\"." >&2
$uzcmd -- "$found" | tar "$tarparam" -
fi
shift
done
exit 0