codekingpro/portable-devtools

1#!/bin/sh2 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 needed7## Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>8 9PATH="/usr/bin:$PATH"; export PATH10 11prog=`echo $0 | sed 's|.*/||'`12case "$prog" in13	*egrep)	grep=${EGREP-egrep}	;;14	*fgrep)	grep=${FGREP-fgrep}	;;15	*)	grep=${GREP-grep}	;;16esac17pat=""18while test $# -ne 0; do19  case "$1" in20  -e | -f) opt="$opt $1"; shift; pat="$1"21           if test "$grep" = grep; then  # grep is buggy with -e on SVR422             grep=egrep23           fi;;24  -A | -B) opt="$opt $1 $2"; shift;;25  -*)	   opt="$opt $1";;26   *)      if test -z "$pat"; then27	     pat="$1"28	   else29	     break;30           fi;;31  esac32  shift33done34 35if test -z "$pat"; then36  echo "grep through bzip2 files"37  echo "usage: $prog [grep_options] pattern [files]"38  exit 139fi40 41list=042silent=043op=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`44case "$op" in45  *l*) list=146esac47case "$op" in48  *h*) silent=149esac50 51if test $# -eq 0; then52  bzip2 -cdfq | $grep $opt "$pat"53  exit $?54fi55 56res=057for i do58  if test -f "$i"; then :; else if test -f "$i.bz2"; then i="$i.bz2"; fi; fi59  if test $list -eq 1; then60    bzip2 -cdfq "$i" | $grep $opt "$pat" 2>&1 > /dev/null && echo $i61    r=$?62  elif test $# -eq 1 -o $silent -eq 1; then63    bzip2 -cdfq "$i" | $grep $opt "$pat"64    r=$?65  else66    j=$(echo "$i" | sed 's/\\/&&/g;s/|/\\&/g;s/&/\\&/g')67    j=`printf "%s" "$j" | tr '\n' ' '`68    # A trick adapted from69    # https://groups.google.com/forum/#!original/comp.unix.shell/x1345iu10eg/Nn1n-1r1uU0J70    # 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>&174    eval `75      exec 4>&1 >&3 3>&-76      {77        bzip2 -cdfq "$i" 4>&-78      } | {79        $grep $opt "$pat" 4>&-; echo "r=$?;" >&480      } | sed "s|^|${j}:|"81    `82  fi83  test "$r" -ne 0 && res="$r"84done85exit $res86