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authorLasse Collin <lasse.collin@tukaani.org>2009-04-13 14:49:48 +0300
committerLasse Collin <lasse.collin@tukaani.org>2009-04-13 14:49:48 +0300
commit2f0bc9cd40f709152a0177c8e585c0757e9af9c9 (patch)
tree465625f251e5167cc749c004a679f3601f616606 /src/scripts/xzgrep
parentPut the interesting parts of XZ Utils into the public domain. (diff)
downloadxz-2f0bc9cd40f709152a0177c8e585c0757e9af9c9.tar.xz
Quick & dirty update to support xz in diff/grep/more scripts.
Diffstat (limited to 'src/scripts/xzgrep')
-rwxr-xr-xsrc/scripts/xzgrep123
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