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#!/bin/sh
# (c) Wolfram Schneider, Berlin. April 1996.
#
# zgrep - search possibly compressed files for a regular expression
#
# $Id: zgrep.getopt,v 1.1 1996/05/12 16:20:26 wosch Exp $
PATH=/bin:/usr/bin:$PATH; export PATH
# grep variant
case "$0" in
*egrep) grep=${EGREP-egrep} ;;
*fgrep) grep=${FGREP-fgrep} ;;
*) grep=${GREP-grep} ;;
esac
gzip=gzip gzipopt="-cdfq" pattern= grepopt= files= line= header=
set -- `getopt "0123456789A:B:CEFGVX:bce:f:hiLlnqsvwxy" "$@"`
# check options
while :
do
case "$1" in
--) shift; break;; # EOF options
-e|-f) pattern="$1 $2"; shift;; # -f file
-l|-L) line=$1; grepopt="$grepopt $1";;
-h|-q) header=$1; grepopt="$grepopt $1";;
*) grepopt="$grepopt $1";; # rest
esac
shift
done
# check pattern
case X"$pattern" in
X) case $# in
0) echo "usage: $0 [grep_options] pattern [files]"; exit 1;;
*) pattern=$1; shift;;
esac
esac
files="$@"
# no shell loop neccessary for option -q or -h
# and a single file or reading from stdin
case "$header"X"$#" in
-h*|-q*|X0|X1) $gzip $gzipopt $files | $grep $grepopt $pattern
exit $?;;
esac
exit=1
for f in $files
do
case "$line" in
-l|-L) if $gzip $gzipopt $f |
$grep $grepopt $pattern >/dev/null
then
echo $f
fi
;;
*) $gzip $gzipopt $f | $grep $grepopt $pattern |
sed "s%^%${f}:%";;
esac
case $? in
2) exit=$?;;
0) case "$exit" in 2);; 1) exit=0;; esac;;
esac
done
exit $exit
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