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#!/bin/sh
# 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
#
# 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 [ $# -ge 1 ]; do
echo >&2
found=
for suffix in "" .gz .tgz .tar.gz .z .tar.z .taz .tpz .Z .tar.Z .tar.bz2; do
if [ -r "${1}$suffix" ]; then
found=$1$suffix
break
fi
done
case $found in
*.tar.bz2 | *.tb2)
uzcmd='bzip2 -cd'
;;
esac
if [ -z "$found" ]; then
echo "$0: could not read \"$1\"." >&2
else
echo "$action \"$found\"." >&2
$uzcmd -- "$found" | tar "$tarparam" -
fi
shift
done
exit 0
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