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#!/bin/sh
# zgrep -- a wrapper around a grep program that decompresses files as needed
# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca>
# Copyright (C) 1998, 2001, 2002, 2006, 2007, 2009, 2010 Free Software
# Foundation
# Copyright (C) 1993 Jean-loup Gailly
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
bindir='/bin'
case $1 in
--__bindir) bindir=${2?}; shift; shift;;
esac
PATH=$bindir:$PATH
grep='${GREP-'\''/bin/grep'\''}'
version='zgrep (gzip) 1.6
Copyright (C) 2010-2013 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly.'
usage="Usage: $0 [OPTION]... [-e] PATTERN [FILE]...
Look for instances of PATTERN in the input FILEs, using their
uncompressed contents if they are compressed.
OPTIONs are the same as for 'grep'.
Report bugs to <bug-gzip@gnu.org>."
# sed script to escape all ' for the shell, and then (to handle trailing
# newlines correctly) append ' to the last line.
escape='
s/'\''/'\''\\'\'''\''/g
$s/$/'\''/
'
operands=
have_pat=0
files_with_matches=0
files_without_matches=0
no_filename=0
with_filename=0
while test $# -ne 0; do
option=$1
shift
optarg=
case $option in
(-[0123456789EFGHIKLPRTUVZabchilnoqrsuvwxyz]*[!0123456789]*)
arg2=-\'$(expr "X$option" : 'X-.[0-9]*\(.*\)' | sed "$escape")
eval "set -- $arg2 "'${1+"$@"}'
option=$(expr "X$option" : 'X\(-.[0-9]*\)');;
(--binary-*=* | --[lm]a*=* | --reg*=*)
;;
(-[ABCDXdefm] | binary-* | --file | --[lm]a* | --reg*)
case ${1?"$option option requires an argument"} in
(*\'*)
optarg=" '"$(printf '%s\n' "$1" | sed "$escape");;
(*)
optarg=" '$1'";;
esac
shift;;
(-f?*\'*)
optarg=" '"$(expr "X$option" : 'X-f\(.*\)' | sed "$escape")
option=-f;;
(-f?*)
optarg=" '"$(expr "X$option" : 'X-f\(.*\)')\'
option=-f;;
(--file=*\'*)
optarg=" '"$(expr "X$option" : 'X--file=\(.*\)' | sed "$escape")
option=--file;;
(--file=*)
optarg=" '"$(expr "X$option" : 'X--file=\(.*\)')\'
option=--file;;
(--)
break;;
(-?*)
;;
(*)
case $option in
(*\'*)
operands="$operands '"$(printf '%s\n' "$option" | sed "$escape");;
(*)
operands="$operands '$option'";;
esac
${POSIXLY_CORRECT+break}
continue;;
esac
case $option in
(-[drRzZ] | --di* | --exc* | --inc* | --rec* | --nu*)
printf >&2 '%s: %s: option not supported\n' "$0" "$option"
exit 2;;
(-e* | --reg*)
have_pat=1;;
(-f | --file)
# The pattern is coming from a file rather than the command-line.
# If the file is actually stdin then we need to do a little
# magic, since we use stdin to pass the gzip output to grep.
# Turn the -f option into an -e option by copying the file's
# contents into OPTARG.
case $optarg in
(" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
option=-e
optarg=" '"$(sed "$escape") || exit 2;;
esac
have_pat=1;;
(--h | --he | --hel | --help)
echo "$usage" || exit 2
exit;;
(-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
| --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
| --with-filename)
with_filename=1
continue;;
(-l | --files-with-*)
files_with_matches=1;;
(-L | --files-witho*)
files_without_matches=1;;
(-h | --no-f*)
no_filename=1;;
(-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
echo "$version" || exit 2
exit;;
esac
case $option in
(*\'?*)
option=\'$(printf '%s\n' "$option" | sed "$escape");;
(*)
option="'$option'";;
esac
grep="$grep $option$optarg"
done
eval "set -- $operands "'${1+"$@"}'
if test $have_pat -eq 0; then
case ${1?"missing pattern; try \`$0 --help' for help"} in
(*\'*)
grep="$grep -- '"$(printf '%s\n' "$1" | sed "$escape");;
(*)
grep="$grep -- '$1'";;
esac
shift
fi
if test $# -eq 0; then
set -- -
fi
exec 3>&1
res=0
for i
do
# Fail if gzip or grep (or sed) fails.
gzip_status=$(
exec 5>&1
(gzip -cdfq -- "$i" 5>&-; echo $? >&5) 3>&- |
if test $files_with_matches -eq 1; then
eval "$grep" >/dev/null && { printf '%s\n' "$i" || exit 2; }
elif test $files_without_matches -eq 1; then
eval "$grep" >/dev/null || {
r=$?
if test $r -eq 1; then
printf '%s\n' "$i" || r=2
fi
exit $r
}
elif test $with_filename -eq 0 &&
{ test $# -eq 1 || test $no_filename -eq 1; }; then
eval "$grep"
else
case $i in
(*'
'* | *'&'* | *'\'* | *'|'*)
i=$(printf '%s\n' "$i" |
sed '
$!N
$s/[&\|]/\\&/g
$s/\n/\\n/g
');;
esac
sed_script="s|^|$i:|"
# Fail if grep or sed fails.
r=$(
exec 4>&1
(eval "$grep" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&-
) && exit $r
r=$?
test 1 -lt $r && exit $r || exit 2
fi >&3 5>&-
)
r=$?
test 128 -lt $r && exit $r
test "$gzip_status" -eq 0 || test "$gzip_status" -eq 2 || r=2
test $res -lt $r && res=$r
done
exit $res
