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Date:      Sat, 9 Feb 2002 19:46:29 +0000
From:      Tony Finch <dot@dotat.at>
To:        fyre@orbital.wiretapped.net
Cc:        "M. Warner Losh" <imp@village.org>, freebsd-standards@FreeBSD.ORG
Subject:   Re: diff problem
Message-ID:  <20020209194629.A11392@chiark.greenend.org.uk>
In-Reply-To: <20020209140259.A51448@descent.robbins.dropbear.id.au>; from tim@robbins.dropbear.id.au on Sat, Feb 09, 2002 at 02:02:59PM %2B1100
References:  <20020209140259.A51448@descent.robbins.dropbear.id.au>

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On Sat, Feb 09, 2002 at 02:02:59PM +1100, Tim Robbins wrote:
> 
> I have absolutely no idea why we have both version 2.5 and version 2.1 of
> patch in the tree. 2.5 lives in /usr/src/contrib/patch, 2.1 lives in
> /usr/src/gnu/usr.bin/patch. Version 2.1 ends up in /usr/bin, version 2.5
> is not installed anywhere I can find.

The reason for this is that versions of `patch` after 2.1 do not correctly
handle the output of `cvs diff`. For example, on FreeBSD-4.5-STABLE, first
using `patch` 2.5 then using `patch` 2.1:

fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 0; cvs diff > patch
cvs diff: Diffing .
cvs diff: Diffing bltin
cvs diff: Diffing funcs
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 1; cat patch
Index: bltin/echo.c
===================================================================
RCS file: /home/ncvs/src/bin/sh/bltin/echo.c,v
retrieving revision 1.9.2.1
diff -u -r1.9.2.1 echo.c
--- bltin/echo.c        29 Jun 2000 20:51:59 -0000      1.9.2.1
+++ bltin/echo.c        9 Feb 2002 19:41:00 -0000
@@ -37,6 +37,8 @@
  * $FreeBSD: src/bin/sh/bltin/echo.c,v 1.9.2.1 2000/06/29 20:51:59 mph Exp $
  */
 
+/* example change */
+
 /*
  * Echo command.
  */
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 0; rm -r bltin
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 0; cvs up
cvs update: Updating .
? patch
? tmp
cvs update: Updating bltin
U bltin/bltin.h
U bltin/echo.1
U bltin/echo.c
cvs update: Updating funcs
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 0; /FreeBSD/releng4/contrib/patch/patch < patch
can't find file to patch at input line 8
Perhaps you should have used the -p or --strip option?
The text leading up to this was:
--------------------------
|Index: bltin/echo.c
|===================================================================
|RCS file: /home/ncvs/src/bin/sh/bltin/echo.c,v
|retrieving revision 1.9.2.1
|diff -u -r1.9.2.1 echo.c
|--- bltin/echo.c       29 Jun 2000 20:51:59 -0000      1.9.2.1
|+++ bltin/echo.c       9 Feb 2002 19:41:00 -0000
--------------------------
File to patch: ^C
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 130; patch < patch
Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|Index: bltin/echo.c
|===================================================================
|RCS file: /home/ncvs/src/bin/sh/bltin/echo.c,v
|retrieving revision 1.9.2.1
|diff -u -r1.9.2.1 echo.c
|--- bltin/echo.c       29 Jun 2000 20:51:59 -0000      1.9.2.1
|+++ bltin/echo.c       9 Feb 2002 19:41:00 -0000
--------------------------
Patching file bltin/echo.c using Plan A...
Hunk #1 succeeded at 37.
done
fanf@hand.dotat.at:/FreeBSD/releng4/bin/sh
: 0; 

Tony.

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