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zgrep revision 1.4.6.1 
      1 #!/bin/sh
      2 #
      3 # $NetBSD: zgrep,v 1.4.6.1 2008/05/11 07:17:39 jdc 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 # 3. The name of the author may not be used to endorse or promote products
     16 #    derived from this software without specific prior written permission.
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     23 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 
     29 grep=/usr/bin/grep
     30 zcat=/usr/bin/zcat
     31 
     32 endofopts=0
     33 pattern_found=0
     34 grep_args=""
     35 silent=0
     36 
     37 prg=$0
     38 
     39 # handle being called 'zegrep' or 'zfgrep'
     40 case ${prg} in
     41     *zegrep)
     42 	grep_args="-E";;
     43     *zfgrep)
     44 	grep_args="-F";;
     45 esac
     46 
     47 # skip all options and pass them on to grep taking care of options
     48 # with arguments, and if -e was supplied
     49 
     50 while [ $# -gt 0 -a ${endofopts} -eq 0 ]
     51 do
     52     case $1 in
     53     # from GNU grep-2.5.1 -- keep in sync!
     54 	-[ABCDXdefm])
     55 	    case $1 in
     56 		-e)
     57 		    pattern_found=1;;
     58 		*)
     59 		    ;;
     60 	    esac
     61 
     62 	    if [ $# -lt 2 ]
     63 		then
     64 		echo "${prg}: missing argument for ${saved_arg} flag" >&2
     65 		exit 1
     66 	    fi
     67 	    grep_args="${grep_args} $1 $2"
     68 	    shift 2
     69 	    ;;
     70 	--)
     71 	    grep_args="${grep_args} $1"
     72 	    shift
     73 	    endofopts=1
     74 	    ;;
     75 	-)
     76 	    endofopts=1
     77 	    ;;
     78 	-h)
     79 	    silent=1
     80 	    shift
     81 	    ;;
     82 	-*)
     83 	    grep_args="${grep_args} $1"
     84 	    shift
     85 	    ;;
     86 	*)
     87 	    # pattern to grep for
     88 	    endofopts=1
     89 	    ;;
     90     esac
     91 done
     92 
     93 # if no -e option was found, take next argument as grep-pattern
     94 if [ ${pattern_found} -lt 1 ]
     95 then
     96     if [ $# -lt 1 ]
     97     then
     98 	echo "${prg}: missing pattern" >&2
     99 	exit 1
    100     fi
    101     pattern=$1
    102     shift
    103 fi
    104 
    105 # call grep ...
    106 if [ $# -lt 1 ]
    107 then
    108     # ... on stdin
    109     ${zcat} -fq - | ${grep} ${grep_args} "${pattern}" -
    110 else
    111     # ... on all files given on the command line
    112     if [ ${silent} -lt 1 ]; then
    113 	grep_args="-H ${grep_args}"
    114     fi
    115     while [ $# -gt 0 ]
    116     do
    117 	${zcat} -fq -- "$1" | ${grep} --label="${1}" "${pattern}" ${grep_args} -
    118 	shift
    119     done
    120 fi
    121 
    122 exit 0
    123