mirror of https://git.tukaani.org/xz.git
75 lines
2.4 KiB
Plaintext
75 lines
2.4 KiB
Plaintext
#!@POSIX_SHELL@
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
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# The original version for gzip was written by Paul Eggert.
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# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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@enable_path_for_scripts@
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#SET_PATH - This line is a placeholder to ease patching this script.
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# Instead of unsetting XZ_OPT, just make sure that xz will use file format
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# autodetection. This way memory usage limit and thread limit can be
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# specified via XZ_OPT.
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xz='@xz@ --format=auto'
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version='xzless (@PACKAGE_NAME@) @VERSION@'
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usage="Usage: ${0##*/} [OPTION]... [FILE]...
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Like 'less', but operate on the uncompressed contents of xz compressed FILEs.
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Options are the same as for 'less'.
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Report bugs to <@PACKAGE_BUGREPORT@>."
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case $1 in
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--help) printf '%s\n' "$usage" || exit 2; exit;;
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--version) printf '%s\n' "$version" || exit 2; exit;;
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esac
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if test "${LESSMETACHARS+set}" != set; then
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# Work around a bug in less 394 and earlier;
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# it mishandles the metacharacters '$%=~'.
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space=' '
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tab=' '
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nl='
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'
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LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~'
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fi
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VER=$(less -V | { read _ ver _ && echo ${ver%%.*}; })
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if test "$VER" -ge 451; then
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# less 451 or later: If the compressed file is valid but has
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# zero bytes of uncompressed data, using two vertical bars ||- makes
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# "less" check the exit status of xz and if it is zero then display
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# an empty file. With a single vertical bar |- and no output from xz,
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# "less" would attempt to display the raw input file instead.
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LESSOPEN="||-$xz -cdfqQ -- %s"
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elif test "$VER" -ge 429; then
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# less 429 or later: LESSOPEN pipe will be used on
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# standard input if $LESSOPEN begins with |-.
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LESSOPEN="|-$xz -cdfqQ -- %s"
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else
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LESSOPEN="|$xz -cdfqQ -- %s"
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fi
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SHOW_PREPROC_ERRORS=
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if test "$VER" -ge 632; then
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SHOW_PREPROC_ERRORS=--show-preproc-errors
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fi
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export LESSMETACHARS LESSOPEN
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exec less $SHOW_PREPROC_ERRORS "$@"
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