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#!/bin/sh
# lzgrep -- a wrapper around a grep program that decompresses files as needed
# Adapted to LZMA utils from gzip-1.3.3 + Red Hat's security patches
# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
# Copyright (C) 1998, 2001 Free Software Foundation
# Copyright (C) 1993 Jean-loup Gailly
# This program 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 2, or (at your option)
# any later version.
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
# Improve error handling, this is supported by bash but not all the other
# shells so we hide the possible error:
set -o pipefail > /dev/null 2> /dev/null
prog=`echo "$0" | sed 's|.*/||'`
case "$prog" in
*egrep) grep=${EGREP-egrep} ;;
*fgrep) grep=${FGREP-fgrep} ;;
*) grep=${GREP-grep} ;;
esac
pat=""
after_dash_dash=""
files_with_matches=0
files_without_matches=0
no_filename=0
with_filename=0
while test $# -ne 0; do
case "$after_dash_dash$1" in
--d* | --rec*) echo >&2 "$0: $1: option not supported"; exit 1;;
--files-with-*) files_with_matches=1;;
--files-witho*) files_without_matches=1;;
--no-f*) no_filename=1;;
--wi*) with_filename=1;;
--*) ;;
-*)
case "$1" in
-*[dr]*) echo >&2 "$0: $1: option not supported"; exit 1;;
esac
case "$1" in
-*H*) with_filename=1;;
esac
case "$1" in
-*h*) no_filename=1;;
esac
case "$1" in
-*L*) files_without_matches=1;;
esac
case "$1" in
-*l*) files_with_matches=1;;
esac;;
esac
case "$after_dash_dash$1" in
-[ef]) opt="$opt $1"; shift; pat="$1"
if test "$grep" = grep; then # grep is buggy with -e on SVR4
grep=egrep
fi;;
-[ABCdm])opt="$opt $1 $2"; shift;;
--) opt="$opt $1"; after_dash_dash=1;;
-*) opt="$opt $1";;
*) if test -z "$pat"; then
pat="$1"
else
break;
fi;;
esac
shift
done
if test -z "$pat"; then
echo "grep through lzma files"
echo "usage: $prog [grep_options] pattern [files]"
exit 1
fi
if test $# -eq 0; then
lzma -dc | $grep $opt "$pat"
exit $?
fi
res=0
trap break SIGPIPE
for i do
lzma -dc "$i" |
if test $files_with_matches -eq 1; then
$grep $opt "$pat" > /dev/null && printf "%s\n" "$i"
elif test $files_without_matches -eq 1; then
$grep $opt "$pat" > /dev/null || printf "%s\n" "$i"
elif test $with_filename -eq 0 && { test $# -eq 1 || test $no_filename -eq 1; }; then
$grep $opt "$pat"
else
i=${i//\\/\\\\}
i=${i//|/\\|}
i=${i//&/\\&}
i=`printf "%s" "$i" | tr '\n' ' '`
if test $with_filename -eq 1; then
sed_script="s|^[^:]*:|${i}:|"
else
sed_script="s|^|${i}:|"
fi
$grep $opt "$pat" | sed "$sed_script"
fi
r=$?
test $res -lt $r && res=$r
# SIGPIPE + 128
test "$r" -eq 141 && exit $res
done
trap - SIGPIPE
exit $res
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