#!/bin/sh
 
 # Bzgrep wrapped for bzip2, 
 # adapted from zgrep by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
 ## zgrep notice:
 ## zgrep -- a wrapper around a grep program that decompresses files as needed
 ## Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
 
 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=""
 while test $# -ne 0; do
   case "$1" in
   -e | -f) opt="$opt $1"; shift; pat="$1"
            if test "$grep" = grep; then  # grep is buggy with -e on SVR4
              grep=egrep
            fi;;
   -A | -B) opt="$opt $1 $2"; shift;;
   -*)	   opt="$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 1
 fi
 
 list=0
 silent=0
 op=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
 case "$op" in
   *l*) list=1
 esac
 case "$op" in
   *h*) silent=1
 esac
 
 if test $# -eq 0; then
   bzip2 -cdfq | $grep $opt "$pat"
   exit $?
 fi
 
 res=0
 for i do
   if test -f "$i"; then :; else if test -f "$i.bz2"; then i="$i.bz2"; fi; fi
   if test $list -eq 1; then
     bzip2 -cdfq "$i" | $grep $opt "$pat" 2>&1 > /dev/null && echo $i
     r=$?
   elif test $# -eq 1 -o $silent -eq 1; then
     bzip2 -cdfq "$i" | $grep $opt "$pat"
     r=$?
   else
     j=${i//\\/\\\\}
     j=${j//|/\\|}
     j=${j//&/\\&}
     j=`printf "%s" "$j" | tr '\n' ' '`
     bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
     r=$?
   fi
   test "$r" -ne 0 && res="$r"
 done
 exit $res