1#!/bin/sh 2 3# Bzgrep wrapped for bzip2, 4# adapted from zgrep by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. 5## zgrep notice: 6## zgrep -- a wrapper around a grep program that decompresses files as needed 7## Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca> 8 9PATH="/usr/bin:$PATH"; export PATH 10 11prog=`echo $0 | sed 's|.*/||'` 12case "$prog" in 13 *egrep) grep=${EGREP-egrep} ;; 14 *fgrep) grep=${FGREP-fgrep} ;; 15 *) grep=${GREP-grep} ;; 16esac 17pat="" 18while test $# -ne 0; do 19 case "$1" in 20 -e | -f) opt="$opt $1"; shift; pat="$1" 21 if test "$grep" = grep; then # grep is buggy with -e on SVR4 22 grep=egrep 23 fi;; 24 -A | -B) opt="$opt $1 $2"; shift;; 25 -*) opt="$opt $1";; 26 *) if test -z "$pat"; then 27 pat="$1" 28 else 29 break; 30 fi;; 31 esac 32 shift 33done 34 35if test -z "$pat"; then 36 echo "grep through bzip2 files" 37 echo "usage: $prog [grep_options] pattern [files]" 38 exit 1 39fi 40 41list=0 42silent=0 43op=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'` 44case "$op" in 45 *l*) list=1 46esac 47case "$op" in 48 *h*) silent=1 49esac 50 51if test $# -eq 0; then 52 bzip2 -cdfq | $grep $opt "$pat" 53 exit $? 54fi 55 56res=0 57for i do 58 if test -f "$i"; then :; else if test -f "$i.bz2"; then i="$i.bz2"; fi; fi 59 if test $list -eq 1; then 60 bzip2 -cdfq "$i" | $grep $opt "$pat" 2>&1 > /dev/null && echo $i 61 r=$? 62 elif test $# -eq 1 -o $silent -eq 1; then 63 bzip2 -cdfq "$i" | $grep $opt "$pat" 64 r=$? 65 else 66 j=$(echo "$i" | sed 's/\\/&&/g;s/|/\\&/g;s/&/\\&/g') 67 j=`printf "%s" "$j" | tr '\n' ' '` 68 # A trick adapted from 69 # https://groups.google.com/forum/#!original/comp.unix.shell/x1345iu10eg/Nn1n-1r1uU0J 70 # that has the same effect as the following bash code: 71 # bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|" 72 # r=${PIPESTATUS[1]} 73 exec 3>&1 74 eval ` 75 exec 4>&1 >&3 3>&- 76 { 77 bzip2 -cdfq "$i" 4>&- 78 } | { 79 $grep $opt "$pat" 4>&-; echo "r=$?;" >&4 80 } | sed "s|^|${j}:|" 81 ` 82 fi 83 test "$r" -ne 0 && res="$r" 84done 85exit $res 86