135 lines
3.8 KiB
Bash
Executable File
135 lines
3.8 KiB
Bash
Executable File
#!/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=${GREP:-grep}
|
|
zcat=${ZCAT:-zstdcat}
|
|
|
|
endofopts=0
|
|
pattern_found=0
|
|
grep_args=""
|
|
hyphen=0
|
|
silent=0
|
|
|
|
prog=${0##*/}
|
|
|
|
# handle being called 'zegrep' or 'zfgrep'
|
|
case $prog in
|
|
*egrep*) prog=zegrep; grep_args='-E';;
|
|
*fgrep*) prog=zfgrep; grep_args='-F';;
|
|
*) prog=zstdgrep;;
|
|
esac
|
|
|
|
# skip all options and pass them on to grep taking care of options
|
|
# with arguments, and if -e was supplied
|
|
|
|
while [ "$#" -gt 0 ] && [ "${endofopts}" -eq 0 ]; do
|
|
case "$1" in
|
|
# from GNU grep-2.5.1 -- keep in sync!
|
|
-[ABCDXdefm])
|
|
if [ "$#" -lt 2 ]; then
|
|
printf '%s: missing argument for %s flag\n' "${prog}" "$1" >&2
|
|
exit 1
|
|
fi
|
|
case "$1" in
|
|
-e)
|
|
pattern="$2"
|
|
pattern_found=1
|
|
shift 2
|
|
break
|
|
;;
|
|
-f)
|
|
pattern_found=2
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
grep_args="${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
|
|
printf '%s: missing pattern\n' "${prog}" >&2
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
EXIT_CODE=0
|
|
# call grep ...
|
|
if [ "$#" -lt 1 ]; then
|
|
# ... on stdin
|
|
set -f # Disable file name generation (globbing).
|
|
# shellcheck disable=SC2086
|
|
"${zcat}" - | "${grep}" ${grep_args} -- "${pattern}" -
|
|
EXIT_CODE=$?
|
|
set +f
|
|
else
|
|
# ... on all files given on the command line
|
|
if [ "${silent}" -lt 1 ] && [ "$#" -gt 1 ]; then
|
|
grep_args="-H ${grep_args}"
|
|
fi
|
|
set -f
|
|
while [ "$#" -gt 0 ]; do
|
|
# shellcheck disable=SC2086
|
|
if [ $pattern_found -eq 2 ]; then
|
|
"${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- -
|
|
else
|
|
"${zcat}" -- "$1" | "${grep}" --label="${1}" ${grep_args} -- "${pattern}" -
|
|
fi
|
|
[ "$?" -ne 0 ] && EXIT_CODE=1
|
|
shift
|
|
done
|
|
set +f
|
|
fi
|
|
|
|
exit "${EXIT_CODE}"
|