#!/bin/sh # bzgrep -- a wrapper around a grep program that decompresses files as needed # Adapted from zgrep of the Debian gzip package by Anibal Monsalve Salazar. # Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca> # Copyright (C) 1998, 2001, 2002 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. PATH="/usr/bin:$PATH"; export PATH 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 2;; --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 2;; 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 bzip2 files" echo "usage: $prog [grep_options] pattern [files]" exit 2 fi if test $# -eq 0; then bzip2 -cdfq | $grep $opt "$pat" exit $? fi res=0 for i do bzip2 -cdfq -- "$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=$(echo "$i" | sed -e 's/[\\|&]/\\&/g') if test $with_filename -eq 1; then sed_script="s|^[^:]*:|${i}:|" else sed_script="s|^|${i}:|" fi # Hack adapted from GPLed code at # http://home.comcast.net/~j.p.h/cus-faq-2 # Has the same effect as the following two lines of bash: # # $grep $opt "$pat" | sed "$sed_script" # exit ${PIPESTATUS[0]} # # Inside the `...`, fd4 goes to the pipe whose other end is read # and passed to eval; fd1 is the normal standard output # preserved the line before with exec 3>&1 exec 3>&1 eval ` exec 4>&1 >&3 3>&- { $grep $opt "$pat" 4>&-; echo "r=$?;" >&4 } | sed "$sed_script" ` exit $r fi r=$? test $res -lt $r && res=$r done exit $res