From 6fb1dc428b25ededa4a993ad080ce65dbdfca73c Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 4 Jan 2007 08:03:20 +0000
Subject: [PATCH] * zdiff.in (cmp0): New var. Rewrite test for /dev/fd/3 to
 detect bugs in Solaris 8 /bin/bash 2.03.  Problem reported by Nelson H. F.
 Beebe in <http://lists.gnu.org/archive/html/bug-gzip/2007-01/msg00001.html>.
 Avoid "for file; do", which doesn't work with Solaris 8 /bin/sh.

---
 ChangeLog |  8 ++++++++
 zdiff.in  | 13 +++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b7699b0..2f62ed2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2007-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* zdiff.in (cmp0): New var.
+	Rewrite test for /dev/fd/3 to detect bugs in Solaris 8
+	/bin/bash 2.03.  Problem reported by Nelson H. F. Beebe in
+	<http://lists.gnu.org/archive/html/bug-gzip/2007-01/msg00001.html>.
+	Avoid "for file; do", which doesn't work with Solaris 8 /bin/sh.
+
 2007-01-03  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* zdiff.in: Test /dev//fd/3, not /dev/fd/3, to work around a problem
diff --git a/zdiff.in b/zdiff.in
index 72caacc..b17eafc 100644
--- a/zdiff.in
+++ b/zdiff.in
@@ -14,6 +14,7 @@ case "$0" in
   *cmp) prog=cmp ; cmp='${CMP-cmp}'  ;;
   *)    prog=diff; cmp='${DIFF-diff}';;
 esac
+cmp0=$cmp
 
 version="z$prog (gzip) @VERSION@
 Copyright (C) 2006 Free Software Foundation, Inc.
@@ -45,7 +46,8 @@ while :; do
 done
 cmp="$cmp --"
 
-for file; do
+for file
+do
   test "X$file" = X- || <"$file" || exit 2
 done
 
@@ -65,9 +67,12 @@ elif test $# -eq 2; then
 		*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
 		    if test "$1$2" = --; then
 			gzip -cdfq - | eval "$cmp" - -
-		    # The extra slash in /dev//fd works around a problem with
-		    # Tru64 4.0F ksh M-11/16/88f.
-		    elif test -r /dev//fd/3 3</dev/null; then
+		    elif
+			# Reject Solaris 8's buggy /bin/bash 2.03.
+			echo X |
+			 (echo X | eval "$cmp0" /dev/fd/3 - >/dev/null 2>&1) \
+				3<&0
+		    then
 			gzip -cdfq -- "$1" |
 			  (gzip -cdfq -- "$2" |
 			   eval "$cmp" /dev/fd/3 -) 3<&0
-- 
2.47.2