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Diffstat (limited to 'zgrep.in')
| -rw-r--r-- | zgrep.in | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/zgrep.in b/zgrep.in new file mode 100644 index 0000000..7ce45ae --- /dev/null +++ b/zgrep.in @@ -0,0 +1,267 @@ +#!/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, 2009-2016 Free Software Foundation, +# Inc. + +# 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. + +grep='${GREP-'\''@GREP@'\''}' + +version='zgrep (gzip) @VERSION@ +Copyright (C) 2010-2016 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', except that the following 'grep' +options are not supported: --dereference-recursive (-R), --directories (-d), +--exclude, --exclude-from, --exclude-dir, --include, --null (-Z), +--null-data (-z), and --recursive (-r). + +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 +pattmp= + +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. + # Similarly if it is not a regular file, since it might be read repeatedly. + # In either of these two cases, copy the pattern into a temporary file, + # and use that file instead. The pattern might contain null bytes, + # so we cannot simply switch to -e here. + if case $optarg in + (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'") + :;; + (*) + eval "test ! -f$optarg";; + esac + then + if test -n "$pattmp"; then + eval "cat --$optarg" >>"$pattmp" || exit 2 + continue + fi + trap ' + test -n "$pattmp" && rm -f "$pattmp" + (exit 2); exit 2 + ' HUP INT PIPE TERM 0 + if type mktemp >/dev/null 2>&1; then + pattmp=$(mktemp) || exit 2 + else + set -C + pattmp=${TMPDIR-/tmp}/zgrep.$$ + fi + eval "cat --$optarg" >"$pattmp" || exit 2 + optarg=' "$pattmp"' + fi + 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=1 + +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 + test 256 -le $r && r=$(expr 128 + $r % 128) + 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>&- + ) || { r=$?; test $r -lt 2 && r=2; } + test 256 -le $r && r=$(expr 128 + $r % 128) + exit $r + fi >&3 5>&- + ) + r=$? + + # Ignore gzip status 2, as it is just a warning. + # gzip status 1 is an error, like grep status 2. + test $gzip_status -eq 2 && gzip_status=0 + test $gzip_status -eq 1 && gzip_status=2 + + # Use the more serious of the grep and gzip statuses. + test $r -lt $gzip_status && r=$gzip_status + + # Accumulate the greatest status, except consider 0 to be greater than 1. + if test $r -le 1 && test $res -le 1; then + test $r -lt $res + else + test $res -lt $r + fi && res=$r + + # Exit immediately on a serious error. + test 126 -le $res && break +done + +if test -n "$pattmp"; then + rm -f "$pattmp" || { + r=$? + test $r -lt 2 && r=2 + test $res -lt $r && res=$r + } + trap - HUP INT PIPE TERM 0 +fi + +test 128 -le $res && kill -$(expr $res % 128) $$ +exit $res |