diff options
Diffstat (limited to 'src/scripts/xzgrep')
| -rwxr-xr-x | src/scripts/xzgrep | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/scripts/xzgrep b/src/scripts/xzgrep new file mode 100755 index 00000000..e359378b --- /dev/null +++ b/src/scripts/xzgrep @@ -0,0 +1,123 @@ +#!/bin/sh + +# xzgrep -- a wrapper around a grep program that decompresses files as needed +# Adapted to XZ Utils from gzip-1.3.3 + Red Hat's security patches +# Adapted from a version sent by Charles Levert <charles@comm.polymtl.ca> +# Copyright (C) 1998, 2001 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 2, 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., 59 Temple Place - Suite 330, Boston, MA +# 02111-1307, USA. + +# Improve error handling, this is supported by bash but not all the other +# shells so we hide the possible error: +set -o pipefail > /dev/null 2> /dev/null + +prog=`echo "$0" | sed 's|.*/||'` +case "$prog" in + *egrep) grep=${EGREP-egrep} ;; + *fgrep) grep=${FGREP-fgrep} ;; + *) grep=${GREP-grep} ;; +esac + +pat="" +after_dash_dash="" +files_with_matches=0 +files_without_matches=0 +no_filename=0 +with_filename=0 + +while test $# -ne 0; do + case "$after_dash_dash$1" in + --d* | --rec*) echo >&2 "$0: $1: option not supported"; exit 1;; + --files-with-*) files_with_matches=1;; + --files-witho*) files_without_matches=1;; + --no-f*) no_filename=1;; + --wi*) with_filename=1;; + --*) ;; + -*) + case "$1" in + -*[dr]*) echo >&2 "$0: $1: option not supported"; exit 1;; + esac + case "$1" in + -*H*) with_filename=1;; + esac + case "$1" in + -*h*) no_filename=1;; + esac + case "$1" in + -*L*) files_without_matches=1;; + esac + case "$1" in + -*l*) files_with_matches=1;; + esac;; + esac + case "$after_dash_dash$1" in + -[ef]) opt="$opt $1"; shift; pat="$1" + if test "$grep" = grep; then # grep is buggy with -e on SVR4 + grep=egrep + fi;; + -[ABCdm])opt="$opt $1 $2"; shift;; + --) opt="$opt $1"; after_dash_dash=1;; + -*) opt="$opt $1";; + *) if test -z "$pat"; then + pat="$1" + else + break; + fi;; + esac + shift +done + +if test -z "$pat"; then + echo "grep through .xz and .lzma files" + echo "usage: $prog [grep_options] pattern [files]" + exit 1 +fi + +if test $# -eq 0; then + xz -dc | $grep $opt "$pat" + exit $? +fi + +res=0 +trap break SIGPIPE +for i do + xz -dc -- "$i" | + if test $files_with_matches -eq 1; then + $grep $opt "$pat" > /dev/null && printf "%s\n" "$i" + elif test $files_without_matches -eq 1; then + $grep $opt "$pat" > /dev/null || printf "%s\n" "$i" + elif test $with_filename -eq 0 && { test $# -eq 1 || test $no_filename -eq 1; }; then + $grep $opt "$pat" + else + i=${i//\\/\\\\} + i=${i//|/\\|} + i=${i//&/\\&} + i=`printf "%s" "$i" | tr '\n' ' '` + if test $with_filename -eq 1; then + sed_script="s|^[^:]*:|${i}:|" + else + sed_script="s|^|${i}:|" + fi + $grep $opt "$pat" | sed "$sed_script" + fi + r=$? + test $res -lt $r && res=$r + # SIGPIPE + 128 + test "$r" -eq 141 && exit $res +done +trap - SIGPIPE +exit $res |