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#!/bin/sh
# xzgrep -- 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 Free Software Foundation
# Copyright (C) 1993 Jean-loup Gailly
# Modified for XZ Utils by Andrew Dudman and Lasse Collin.
# 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 2 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.
#SET_PATH - This line is a placeholder to ease patching this script.
# Instead of unsetting XZ_OPT, just make sure that xz will use file format
# autodetection. This way memory usage limit and thread limit can be
# specified via XZ_OPT. With gzip, bzip2, and lzop it's OK to just unset the
# environment variables.
xz='xz --format=auto'
unset GZIP BZIP BZIP2 LZOP
case ${0##*/} in
*egrep*) prog=xzegrep; grep=${GREP:-egrep};;
*fgrep*) prog=xzfgrep; grep=${GREP:-fgrep};;
*) prog=xzgrep; grep=${GREP:-grep};;
esac
version="$prog (XZ Utils) 5.2.5"
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 <lasse.collin@tukaani.org>."
# sed script to escape all ' for the shell, and then (to handle trailing
# newlines correctly) turn trailing X on last line into '.
escape='
s/'\''/'\''\\'\'''\''/g
$s/X$/'\''/
'
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 $option in
(-[0123456789abcdhHiIKLlnoqrRsTuUvVwxyzZ]?*)
arg2=-\'$(expr "X${option}X" : 'X-.[0-9]*\(.*\)' | sed "$escape")
eval "set -- $arg2 "'${1+"$@"}'
option=$(expr "X$option" : 'X\(-.[0-9]*\)');;
(--binary-*=* | --[lm]a*=* | --reg*=*)
;;
(-[ABCDefm] | --binary-* | --file | --[lm]a* | --reg*)
case ${1?"$option option requires an argument"} in
(*\'*)
optarg=" '"$(printf '%sX\n' "$1" | sed "$escape");;
(*)
optarg=" '$1'";;
esac
shift;;
(--)
break;;
(-?*)
;;
(*)
case $option in
(*\'*)
operands="$operands '"$(printf '%sX\n' "$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;;
(-[ef]* | --file | --file=* | --reg*)
have_pat=1;;
(--h | --he | --hel | --help)
echo "$usage" || exit 2
exit;;
(-H | --wi | --wit | --with | --with- | --with-f | --with-fi \
| --with-fil | --with-file | --with-filen | --with-filena | --with-filenam \
| --with-filename)
with_filename=1
continue;;
(-l | --files-with-*)
files_with_matches=1
continue;;
(-L | --files-witho*)
files_without_matches=1
continue;;
(-h | --no-f*)
no_filename=1;;
(-V | --v | --ve | --ver | --vers | --versi | --versio | --version)
echo "$version" || exit 2
exit;;
esac
case $option in
(*\'?*)
option=\'$(expr "X${option}X" : 'X\(.*\)' | sed "$escape");;
(*)
option="'$option'";;
esac
grep="$grep $option$optarg"
done
if test $files_with_matches -eq 1 || test $files_without_matches -eq 1; then
grep="$grep -q"
fi
eval "set -- $operands "'${1+"$@"}'
if test $have_pat -eq 0; then
case ${1?"Missing pattern; try \`${0##*/} --help' for help"} in
(*\'*)
grep="$grep -- '"$(printf '%sX\n' "$1" | sed "$escape");;
(*)
grep="$grep -- '$1'";;
esac
shift
fi
if test $# -eq 0; then
set -- -
fi
exec 3>&1
# res=1 means that no file matched yet
res=1
for i; do
case $i in
*[-.][zZ] | *_z | *[-.]gz | *.t[ag]z) uncompress="gzip -cdf";;
*[-.]bz2 | *[-.]tbz | *.tbz2) uncompress="bzip2 -cdf";;
*[-.]lzo | *[-.]tzo) uncompress="lzop -cdf";;
*[-.]zst | *[-.]tzst) uncompress="zstd -cdfq";; # zstd needs -q.
*) uncompress="$xz -cdf";;
esac
# Fail if xz or grep (or sed) fails.
xz_status=$(
exec 5>&1
($uncompress -- "$i" 5>&-; echo $? >&5) 3>&- |
if test $files_with_matches -eq 1; then
eval "$grep" && { printf '%s\n' "$i" || exit 2; }
elif test $files_without_matches -eq 1; then
eval "$grep" || {
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
# Append a colon so that the last character will never be a newline
# which would otherwise get lost in shell command substitution.
i="$i:"
# Escape & \ | and newlines only if such characters are present
# (speed optimization).
case $i in
(*'
'* | *'&'* | *'\'* | *'|'*)
i=$(printf '%s\n' "$i" | LC_ALL=C sed 's/[&\|]/\\&/g; $!s/$/\\/');;
esac
# $i already ends with a colon so don't add it here.
sed_script="s|^|$i|"
# Fail if grep or sed fails.
r=$(
exec 4>&1
(eval "$grep" 4>&-; echo $? >&4) 3>&- |
LC_ALL=C sed "$sed_script" >&3 4>&-
) || r=2
exit $r
fi >&3 5>&-
)
r=$?
# fail occurred previously, nothing worse can happen
test $res -gt 1 && continue
if test "$xz_status" -eq 0; then
:
elif test "$xz_status" -ge 128 \
&& test "$(kill -l "$xz_status" 2> /dev/null)" = "PIPE"; then
:
else
r=2
fi
# still no match
test $r -eq 1 && continue
# 0 == match, >=2 == fail
res=$r
done
exit $res
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