--- gzip-1.3.5/zgrep.in.orig	2005-05-19 15:05:49 +0000
+++ gzip-1.3.5/zgrep.in	2005-05-19 15:25:30 +0000
@@ -92,23 +92,28 @@ if test $# -eq 0; then
 fi
 
 res=0
+trap break PIPE
 for i do
   gzip -cdfq "$i" |
     if test $files_with_matches -eq 1; then
-      $grep $opt "$pat" > /dev/null && echo $i
+      $grep -q $opt "$pat" && printf '%s\n' "$i"
     elif test $files_without_matches -eq 1; then
-      $grep $opt "$pat" > /dev/null || echo $i
+      $grep -q $opt "$pat" || printf '%s\n' "$i"
     elif test $with_filename -eq 0 && { test $# -eq 1 || test $no_filename -eq 1; }; then
       $grep $opt "$pat"
     else
+      i="$(printf %s "$i" |tr '\n' ' ' |sed -e 's/[\\|&]/\\&/g')"
       if test $with_filename -eq 1; then
 	sed_script="s|^[^:]*:|${i}:|"
       else
 	sed_script="s|^|${i}:|"
       fi
-      $grep $opt "$pat" | sed "$sed_script"
+      $grep $opt "$pat" | sed -e "$sed_script"
     fi
   r=$?
   test $res -lt $r && res=$r
+  # signo + 128
+  test "$r" -gt 128 && exit $res
 done
+trap - PIPE
 exit $res