133 lines
3.6 KiB
Bash
133 lines
3.6 KiB
Bash
#!/bin/sh
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# bzgrep -- a wrapper around a grep program that decompresses files as needed
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# Adapted from zgrep of the Debian gzip package by Anibal Monsalve Salazar.
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# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
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# Copyright (C) 1998, 2001, 2002 Free Software Foundation
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# Copyright (C) 1993 Jean-loup Gailly
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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, or (at your option)
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# 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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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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PATH="/usr/bin:$PATH"; export PATH
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prog=`echo "$0" | sed 's|.*/||'`
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case "$prog" in
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*egrep) grep=${EGREP-egrep} ;;
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*fgrep) grep=${FGREP-fgrep} ;;
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*) grep=${GREP-grep} ;;
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esac
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pat=""
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after_dash_dash=""
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files_with_matches=0
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files_without_matches=0
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no_filename=0
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with_filename=0
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while test $# -ne 0; do
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case "$after_dash_dash$1" in
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--d* | --rec*) echo >&2 "$0: $1: option not supported"; exit 2;;
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--files-with-*) files_with_matches=1;;
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--files-witho*) files_without_matches=1;;
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--no-f*) no_filename=1;;
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--wi*) with_filename=1;;
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--*) ;;
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-*)
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case "$1" in
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-*[dr]*) echo >&2 "$0: $1: option not supported"; exit 2;;
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esac
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case "$1" in
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-*H*) with_filename=1;;
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esac
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case "$1" in
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-*h*) no_filename=1;;
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esac
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case "$1" in
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-*L*) files_without_matches=1;;
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esac
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case "$1" in
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-*l*) files_with_matches=1;;
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esac;;
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esac
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case "$after_dash_dash$1" in
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-[ef]) opt="$opt $1"; shift; pat="$1"
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if test "$grep" = grep; then # grep is buggy with -e on SVR4
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grep=egrep
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fi;;
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-[ABCdm])opt="$opt $1 $2"; shift;;
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--) opt="$opt $1"; after_dash_dash=1;;
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-*) opt="$opt $1";;
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*) if test -z "$pat"; then
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pat="$1"
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else
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break;
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fi;;
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esac
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shift
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done
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if test -z "$pat"; then
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echo "grep through bzip2 files"
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echo "usage: $prog [grep_options] pattern [files]"
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exit 2
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fi
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if test $# -eq 0; then
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bzip2 -cdfq | $grep $opt "$pat"
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exit $?
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fi
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res=0
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for i do
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bzip2 -cdfq -- "$i" |
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if test $files_with_matches -eq 1; then
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$grep $opt "$pat" > /dev/null && printf "%s\n" "$i"
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elif test $files_without_matches -eq 1; then
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$grep $opt "$pat" > /dev/null || printf "%s\n" "$i"
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elif test $with_filename -eq 0 && { test $# -eq 1 || test $no_filename -eq 1; }; then
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$grep $opt "$pat"
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else
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i=$(echo "$i" | sed -e 's/[\\|&]/\\&/g')
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if test $with_filename -eq 1; then
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sed_script="s|^[^:]*:|${i}:|"
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else
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sed_script="s|^|${i}:|"
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fi
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# Hack adapted from GPLed code at
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# http://home.comcast.net/~j.p.h/cus-faq-2
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# Has the same effect as the following two lines of bash:
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#
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# $grep $opt "$pat" | sed "$sed_script"
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# exit ${PIPESTATUS[0]}
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#
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# Inside the `...`, fd4 goes to the pipe whose other end is read
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# and passed to eval; fd1 is the normal standard output
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# preserved the line before with exec 3>&1
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exec 3>&1
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eval `
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exec 4>&1 >&3 3>&-
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{
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$grep $opt "$pat" 4>&-; echo "r=$?;" >&4
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} | sed "$sed_script"
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`
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exit $r
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fi
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r=$?
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test $res -lt $r && res=$r
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done
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exit $res
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