1#!/bin/sh 2# 3# Copyright (c) 2003 Thomas Klausner. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 25grep=grep 26zcat=zstdcat 27 28endofopts=0 29pattern_found=0 30grep_args="" 31hyphen=0 32silent=0 33 34prg=$(basename $0) 35 36# handle being called 'zegrep' or 'zfgrep' 37case ${prg} in 38 *zegrep) 39 grep_args="-E";; 40 *zfgrep) 41 grep_args="-F";; 42esac 43 44# skip all options and pass them on to grep taking care of options 45# with arguments, and if -e was supplied 46 47while [ $# -gt 0 -a ${endofopts} -eq 0 ] 48do 49 case $1 in 50 # from GNU grep-2.5.1 -- keep in sync! 51 -[ABCDXdefm]) 52 if [ $# -lt 2 ] 53 then 54 echo "${prg}: missing argument for $1 flag" >&2 55 exit 1 56 fi 57 case $1 in 58 -e) 59 pattern="$2" 60 pattern_found=1 61 shift 2 62 break 63 ;; 64 *) 65 ;; 66 esac 67 grep_args="${grep_args} $1 $2" 68 shift 2 69 ;; 70 --) 71 shift 72 endofopts=1 73 ;; 74 -) 75 hyphen=1 76 shift 77 ;; 78 -h) 79 silent=1 80 shift 81 ;; 82 -*) 83 grep_args="${grep_args} $1" 84 shift 85 ;; 86 *) 87 # pattern to grep for 88 endofopts=1 89 ;; 90 esac 91done 92 93# if no -e option was found, take next argument as grep-pattern 94if [ ${pattern_found} -lt 1 ] 95then 96 if [ $# -ge 1 ]; then 97 pattern="$1" 98 shift 99 elif [ ${hyphen} -gt 0 ]; then 100 pattern="-" 101 else 102 echo "${prg}: missing pattern" >&2 103 exit 1 104 fi 105fi 106 107# call grep ... 108if [ $# -lt 1 ] 109then 110 # ... on stdin 111 ${zcat} -fq - | ${grep} ${grep_args} -- "${pattern}" - 112else 113 # ... on all files given on the command line 114 if [ ${silent} -lt 1 -a $# -gt 1 ]; then 115 grep_args="-H ${grep_args}" 116 fi 117 while [ $# -gt 0 ] 118 do 119 ${zcat} -fq -- "$1" | ${grep} --label="${1}" ${grep_args} -- "${pattern}" - 120 shift 121 done 122fi 123 124exit 0 125