91 lines
2.4 KiB
Bash
Executable File
91 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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#
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# lz.sh, Copyright © 2010 Matteo Cypriani
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#
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# This program is free software. It comes without any warranty, to
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# the extent permitted by applicable law. You can redistribute it
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# and/or modify it under the terms of the Do What The Fuck You Want
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# To Public License, Version 2, as published by Sam Hocevar. See
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# http://sam.zoy.org/wtfpl/COPYING for more details.
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#
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# This script emulates and extends commands lz and uz from the mtools.
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# It handles: .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lzma and .tar.Z,
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# through the standards options of GNU tar.
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# If the script name is "lz", the archive content is displayed. If the
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# name is "uz", it is extracted.
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# Note that you need GNU Tar, at least version 1.20 to support LZMA,
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# and 1.22 to support XZ.
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## Verify program name ##
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PROGRAM="$(basename "$0")"
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if [ "$PROGRAM" = "lz" ] ; then
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ACTION="t"
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elif [ "$PROGRAM" = "uz" ] ; then
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ACTION="x"
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else
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printf 'Error! Program name is "%s" (not "lz" nor "uz")!\n' "$PROGRAM" >&2
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exit 1
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fi
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## Verify number of arguments ##
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if [ $# -lt 1 ] ; then
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echo "$PROGRAM requires at least one argument!" >&2
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exit 2
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fi
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## Process files ##
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for F in "$@" ; do
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if [ "$ACTION" = "t" ] ; then
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echo "*** Listing « $F » ***" >&2
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else
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echo "Extracting « $F »…"
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fi
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# Simple Tar archive
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if [ "$(basename "$F" .tar)" != "$F" ] ; then
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FORMAT=""
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# GZipped Tar
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elif [ "$(basename "$F" .tar.gz)" != "$F" ] || \
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[ "$(basename "$F" .tgz)" != "$F" ] ; then
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FORMAT="--gzip"
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# BZipped Tar
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elif [ "$(basename "$F" .tar.bz2)" != "$F" ] || \
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[ "$(basename "$F" .tbz)" != "$F" ] || \
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[ "$(basename "$F" .tb2)" != "$F" ] ; then
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FORMAT="--bzip"
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# XZipped Tar
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elif [ "$(basename "$F" .tar.xz)" != "$F" ] || \
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[ "$(basename "$F" .txz)" != "$F" ] ; then
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FORMAT="--xz"
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# Compressed Tar
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elif [ "$(basename "$F" .tar.Z)" != "$F" ] || \
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[ "$(basename "$F" .taz)" != "$F" ] ; then
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FORMAT="--compress"
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# LZMA compressed Tar
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elif [ "$(basename "$F" .tar.lzma)" != "$F" ] || \
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[ "$(basename "$F" .tlz)" != "$F" ] ; then
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FORMAT="--lzma"
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# Unknown extension
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else
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printf 'Extension of file "%s" unknown! (skipping)\n' "$F" >&2
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continue
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fi
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tar "$FORMAT" -"$ACTION"f "$F"
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done
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# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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