73 lines
1.4 KiB
Plaintext
73 lines
1.4 KiB
Plaintext
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#!/bin/sh
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# (c) Wolfram Schneider, Berlin. April 1996.
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#
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# zgrep - search possibly compressed files for a regular expression
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#
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# $Id: zgrep,v 1.4 1996/04/28 18:43:47 wosch Exp $
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PATH=/bin:/usr/bin:$PATH; export PATH
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# grep variant
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case "$0" in
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*egrep) grep=${EGREP-egrep} ;;
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*fgrep) grep=${FGREP-fgrep} ;;
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*) grep=${GREP-grep} ;;
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esac
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gzip=gzip gzipopt="-cdfq" pattern= grepopt= files= line= header=
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set -- `getopt "0123456789A:B:CEFGVX:bce:f:hiLlnqsvwxy" "$@"`
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# check options
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while :
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do
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case "$1" in
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--) shift; break;; # EOF options
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-e|-f) pattern="$1 $2"; shift;; # -f file
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-l|-L) line=$1; grepopt="$grepopt $1";;
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-h|-q) header=$1; grepopt="$grepopt $1";;
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*) grepopt="$grepopt $1";; # rest
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esac
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shift
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done
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# check pattern
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case X"$pattern" in
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X) case $# in
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0) echo "usage: $0 [grep_options] pattern [files]"; exit 1;;
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*) pattern=$1; shift;;
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esac
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esac
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files="$@"
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# no shell loop neccessary for option -q or -h
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# and a single file or reading from stdin
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case "$header"X"$#" in
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-h*|-q*|X0|X1) $gzip $gzipopt $files | $grep $grepopt $pattern
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exit $?;;
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esac
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exit=1
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for f in $files
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do
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case "$line" in
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-l|-L) if $gzip $gzipopt $f |
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$grep $grepopt $pattern >/dev/null
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then
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echo $f
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fi
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;;
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*) $gzip $gzipopt $f | $grep $grepopt $pattern |
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sed "s%^%${f}:%";;
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esac
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case $? in
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2) exit=$?;;
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0) case "$exit" in 2);; 1) exit=0;; esac;;
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esac
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done
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exit $exit
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