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|
#!/bin/sh
#
# Copyright (c) 2003 Thomas Klausner.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
grep=grep
zcat=zstdcat
endofopts=0
pattern_found=0
grep_args=""
hyphen=0
silent=0
prg=$(basename $0)
# handle being called 'zegrep' or 'zfgrep'
case ${prg} in
*zegrep)
grep_args="-E";;
*zfgrep)
grep_args="-F";;
esac
# skip all options and pass them on to grep taking care of options
# with arguments, and if -e was supplied
while [ $# -gt 0 -a ${endofopts} -eq 0 ]
do
case $1 in
# from GNU grep-2.5.1 -- keep in sync!
-[ABCDXdefm])
if [ $# -lt 2 ]
then
echo "${prg}: missing argument for $1 flag" >&2
exit 1
fi
case $1 in
-e)
pattern="$2"
pattern_found=1
shift 2
break
;;
*)
;;
esac
grep_args="${grep_args} $1 $2"
shift 2
;;
--)
shift
endofopts=1
;;
-)
hyphen=1
shift
;;
-h)
silent=1
shift
;;
-*)
grep_args="${grep_args} $1"
shift
;;
*)
# pattern to grep for
endofopts=1
;;
esac
done
# if no -e option was found, take next argument as grep-pattern
if [ ${pattern_found} -lt 1 ]
then
if [ $# -ge 1 ]; then
pattern="$1"
shift
elif [ ${hyphen} -gt 0 ]; then
pattern="-"
else
echo "${prg}: missing pattern" >&2
exit 1
fi
fi
# call grep ...
if [ $# -lt 1 ]
then
# ... on stdin
${zcat} -fq - | ${grep} ${grep_args} -- "${pattern}" -
else
# ... on all files given on the command line
if [ ${silent} -lt 1 -a $# -gt 1 ]; then
grep_args="-H ${grep_args}"
fi
while [ $# -gt 0 ]
do
${zcat} -fq -- "$1" | ${grep} --label="${1}" ${grep_args} -- "${pattern}" -
shift
done
fi
exit 0
|
