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      1 #!/bin/sh
      2 #
      3 # $NetBSD: zgrep,v 1.9 2015/07/06 12:05:40 nakayama Exp $
      4 #
      5 # Copyright (c) 2003 Thomas Klausner.
      6 #
      7 # Redistribution and use in source and binary forms, with or without
      8 # modification, are permitted provided that the following conditions
      9 # are met:
     10 # 1. Redistributions of source code must retain the above copyright
     11 #    notice, this list of conditions and the following disclaimer.
     12 # 2. Redistributions in binary form must reproduce the above copyright
     13 #    notice, this list of conditions and the following disclaimer in the
     14 #    documentation and/or other materials provided with the distribution.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26 
     27 grep=/usr/bin/grep
     28 zcat=/usr/bin/zcat
     29 
     30 endofopts=0
     31 pattern_found=0
     32 grep_args=""
     33 hyphen=0
     34 silent=0
     35 
     36 prg=$(basename $0)
     37 
     38 # handle being called 'zegrep' or 'zfgrep'
     39 case ${prg} in
     40     *zegrep)
     41 	grep_args="-E";;
     42     *zfgrep)
     43 	grep_args="-F";;
     44 esac
     45 
     46 # skip all options and pass them on to grep taking care of options
     47 # with arguments, and if -e was supplied
     48 
     49 while [ $# -gt 0 -a ${endofopts} -eq 0 ]
     50 do
     51     case $1 in
     52     # from GNU grep-2.5.1 -- keep in sync!
     53 	-[ABCDXdefm])
     54 	    if [ $# -lt 2 ]
     55 		then
     56 		echo "${prg}: missing argument for $1 flag" >&2
     57 		exit 1
     58 	    fi
     59 	    case $1 in
     60 		-e)
     61 		    pattern="$2"
     62 		    pattern_found=1
     63 		    shift 2
     64 		    break
     65 		    ;;
     66 		*)
     67 		    ;;
     68 	    esac
     69 	    grep_args="${grep_args} $1 $2"
     70 	    shift 2
     71 	    ;;
     72 	--)
     73 	    shift
     74 	    endofopts=1
     75 	    ;;
     76 	-)
     77 	    hyphen=1
     78 	    shift
     79 	    ;;
     80 	-h)
     81 	    silent=1
     82 	    shift
     83 	    ;;
     84 	-*)
     85 	    grep_args="${grep_args} $1"
     86 	    shift
     87 	    ;;
     88 	*)
     89 	    # pattern to grep for
     90 	    endofopts=1
     91 	    ;;
     92     esac
     93 done
     94 
     95 # if no -e option was found, take next argument as grep-pattern
     96 if [ ${pattern_found} -lt 1 ]
     97 then
     98     if [ $# -ge 1 ]; then
     99 	pattern="$1"
    100 	shift
    101     elif [ ${hyphen} -gt 0 ]; then
    102 	pattern="-"
    103     else
    104 	echo "${prg}: missing pattern" >&2
    105 	exit 1
    106     fi
    107 fi
    108 
    109 # call grep ...
    110 if [ $# -lt 1 ]
    111 then
    112     # ... on stdin
    113     ${zcat} -fq - | ${grep} ${grep_args} -- "${pattern}" -
    114 else
    115     # ... on all files given on the command line
    116     if [ ${silent} -lt 1 -a $# -gt 1 ]; then
    117 	grep_args="-H ${grep_args}"
    118     fi
    119     while [ $# -gt 0 ]
    120     do
    121 	${zcat} -fq -- "$1" | ${grep} --label="${1}" ${grep_args} -- "${pattern}" -
    122 	shift
    123     done
    124 fi
    125 
    126 exit 0
    127