X-Git-Url: https://git.cworth.org/git?p=gzip;a=blobdiff_plain;f=zgrep.in;h=1046ecc5a0ab9c8554085c9601eadda766d57451;hp=cac4863f4270881138aa3c2a599dd884246172ac;hb=e7921f54c622e3b32e525f345bc34308821e4ae0;hpb=c9eb602f6f5c10a521e7274640033f6a35deca1d

diff --git a/zgrep.in b/zgrep.in
old mode 100755
new mode 100644
index cac4863..1046ecc
--- a/zgrep.in
+++ b/zgrep.in
@@ -1,26 +1,24 @@
-:
 #!/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 Free Software Foundation
+# Copyright (C) 1998, 2001, 2002, 2006 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.
+# 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.
 
-# 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.
+# 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.
 
 PATH="BINDIR:$PATH"; export PATH
 
@@ -31,6 +29,22 @@ case "$prog" in
 	*)	grep=${GREP-grep}	;;
 esac
 
+version="z$grep (gzip) @VERSION@
+Copyright (C) 2006 Free Software Foundation, Inc.
+This is free software.  You may redistribute copies of it under the terms of
+the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
+There is NO WARRANTY, to the extent permitted by law.
+
+Written by Jean-loup Gailly."
+
+usage="Usage: z$grep [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>."
+
 pat=""
 after_dash_dash=""
 files_with_matches=0
@@ -41,9 +55,11 @@ with_filename=0
 while test $# -ne 0; do
   case "$after_dash_dash$1" in
   --d* | --rec*)	echo >&2 "$0: $1: option not supported"; exit 2;;
+  --h*)			echo "$usage" || exit 2; exit;;
   --files-with-*)	files_with_matches=1;;
   --files-witho*)	files_without_matches=1;;
   --no-f*)	no_filename=1;;
+  --v*)		echo "$version" || exit 2; exit;;
   --wi*)	with_filename=1;;
   --*)	;;
   -*)
@@ -81,8 +97,7 @@ while test $# -ne 0; do
 done
 
 if test -z "$pat"; then
-  echo "grep through gzip files"
-  echo "usage: $prog [grep_options] pattern [files]"
+  echo "$usage"
   exit 2
 fi
 
@@ -95,35 +110,42 @@ res=0
 for i do
   gzip -cdfq -- "$i" |
     if test $files_with_matches -eq 1; then
-      $grep $opt "$pat" > /dev/null && printf "%s\n" "$i"
+      $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"
+      $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=$(echo "$i" | sed -e 's/[\\|&]/\\&/g')
+      escaped=
+      while :; do
+	case $i in
+	*'
+'*)
+	  char='
+'	  repl='\\n';;
+	*'&'*) char='&' repl='\&';;
+	*'\'*) char='\\' repl='\\';;
+	*'|'*) char='|' repl='\|';;
+	*) break;;
+	esac
+	up_to_first_char="\\([^$char]*\\)"
+	after_first_char="[^$char]*$char\\(.*\\)"
+	escaped=$escaped`expr "X$i" : "X$up_to_first_char"`$repl
+ 	i=`expr "X$i" : "$after_first_char"`
+      done
       if test $with_filename -eq 1; then
-	sed_script="s|^[^:]*:|${i}:|"
+	sed_script="s|[^:]*|$escaped$i|"
       else
-	sed_script="s|^|${i}:|"
+	sed_script="s|^|$escaped$i:|"
       fi
-      # Hack adapted from GPLed code at
-      # http://home.comcast.net/~j.p.h/cus-faq-2
-      # Has the same effect as the following two lines of bash:
-      #
-      # $grep $opt "$pat" | sed "$sed_script"
-      # exit ${PIPESTATUS[0]}
-      #
-      # Inside the `...`, fd4 goes to the pipe whose other end is read
-      # and passed to eval; fd1 is the normal standard output
-      # preserved the line before with exec 3>&1
+
+      # Fail if either grep or sed fails.
+      # Bash has ${PIPESTATUS[0]}, but that's not portable.
       exec 3>&1
-      eval `
-      exec 4>&1 >&3 3>&-
-      {
-       $grep $opt "$pat" 4>&-; echo "r=$?;" >&4
-      } | sed "$sed_script"
-      `
+      r=`
+	exec 4>&1
+	($grep $opt "$pat" 4>&-; echo $? >&4) 3>&- | sed "$sed_script" >&3 4>&-
+      ` &&
       exit $r
     fi
   r=$?