| 1 | #!/bin/sh
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| 2 |
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| 3 | # bzgrep -- a wrapper around a grep program that decompresses files as needed
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| 4 | # Adapted from zgrep of the Debian gzip package by Anibal Monsalve Salazar.
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| 5 | # Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
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| 6 |
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| 7 | # Copyright (C) 1998, 2001, 2002 Free Software Foundation
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| 8 | # Copyright (C) 1993 Jean-loup Gailly
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| 9 |
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2, or (at your option)
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| 13 | # any later version.
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| 14 |
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 |
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 23 | # 02111-1307, USA.
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| 24 |
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| 25 | PATH="/usr/bin:$PATH"; export PATH
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| 26 |
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| 27 | prog=`echo "$0" | sed 's|.*/||'`
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| 28 | case "$prog" in
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| 29 | *egrep) grep=${EGREP-egrep} ;;
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| 30 | *fgrep) grep=${FGREP-fgrep} ;;
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| 31 | *) grep=${GREP-grep} ;;
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| 32 | esac
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| 33 |
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| 34 | pat=""
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| 35 | after_dash_dash=""
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| 36 | files_with_matches=0
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| 37 | files_without_matches=0
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| 38 | no_filename=0
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| 39 | with_filename=0
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| 40 |
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| 41 | while test $# -ne 0; do
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| 42 | case "$after_dash_dash$1" in
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| 43 | --d* | --rec*) echo >&2 "$0: $1: option not supported"; exit 2;;
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| 44 | --files-with-*) files_with_matches=1;;
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| 45 | --files-witho*) files_without_matches=1;;
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| 46 | --no-f*) no_filename=1;;
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| 47 | --wi*) with_filename=1;;
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| 48 | --*) ;;
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| 49 | -*)
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| 50 | case "$1" in
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| 51 | -*[dr]*) echo >&2 "$0: $1: option not supported"; exit 2;;
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| 52 | esac
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| 53 | case "$1" in
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| 54 | -*H*) with_filename=1;;
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| 55 | esac
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| 56 | case "$1" in
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| 57 | -*h*) no_filename=1;;
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| 58 | esac
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| 59 | case "$1" in
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| 60 | -*L*) files_without_matches=1;;
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| 61 | esac
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| 62 | case "$1" in
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| 63 | -*l*) files_with_matches=1;;
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| 64 | esac;;
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| 65 | esac
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| 66 | case "$after_dash_dash$1" in
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| 67 | -[ef]) opt="$opt $1"; shift; pat="$1"
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| 68 | if test "$grep" = grep; then # grep is buggy with -e on SVR4
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| 69 | grep=egrep
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| 70 | fi;;
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| 71 | -[ABCdm])opt="$opt $1 $2"; shift;;
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| 72 | --) opt="$opt $1"; after_dash_dash=1;;
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| 73 | -*) opt="$opt $1";;
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| 74 | *) if test -z "$pat"; then
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| 75 | pat="$1"
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| 76 | else
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| 77 | break;
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| 78 | fi;;
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| 79 | esac
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| 80 | shift
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| 81 | done
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| 82 |
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| 83 | if test -z "$pat"; then
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| 84 | echo "grep through bzip2 files"
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| 85 | echo "usage: $prog [grep_options] pattern [files]"
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| 86 | exit 2
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| 87 | fi
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| 88 |
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| 89 | if test $# -eq 0; then
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| 90 | bzip2 -cdfq | $grep $opt "$pat"
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| 91 | exit $?
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| 92 | fi
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| 93 |
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| 94 | res=0
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| 95 | for i do
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| 96 | bzip2 -cdfq -- "$i" |
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| 97 | if test $files_with_matches -eq 1; then
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| 98 | $grep $opt "$pat" > /dev/null && printf "%s\n" "$i"
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| 99 | elif test $files_without_matches -eq 1; then
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| 100 | $grep $opt "$pat" > /dev/null || printf "%s\n" "$i"
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| 101 | elif test $with_filename -eq 0 && { test $# -eq 1 || test $no_filename -eq 1; }; then
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| 102 | $grep $opt "$pat"
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| 103 | else
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| 104 | i=$(echo "$i" | sed -e 's/[\\|&]/\\&/g')
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| 105 | if test $with_filename -eq 1; then
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| 106 | sed_script="s|^[^:]*:|${i}:|"
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| 107 | else
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| 108 | sed_script="s|^|${i}:|"
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| 109 | fi
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| 110 | # Hack adapted from GPLed code at
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| 111 | # http://home.comcast.net/~j.p.h/cus-faq-2
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| 112 | # Has the same effect as the following two lines of bash:
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| 113 | #
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| 114 | # $grep $opt "$pat" | sed "$sed_script"
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| 115 | # exit ${PIPESTATUS[0]}
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| 116 | #
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| 117 | # Inside the `...`, fd4 goes to the pipe whose other end is read
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| 118 | # and passed to eval; fd1 is the normal standard output
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| 119 | # preserved the line before with exec 3>&1
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| 120 | exec 3>&1
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| 121 | eval `
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| 122 | exec 4>&1 >&3 3>&-
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| 123 | {
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| 124 | $grep $opt "$pat" 4>&-; echo "r=$?;" >&4
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| 125 | } | sed "$sed_script"
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| 126 | `
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| 127 | exit $r
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| 128 | fi
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| 129 | r=$?
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| 130 | test $res -lt $r && res=$r
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| 131 | done
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| 132 | exit $res
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