/* Written  6:24 pm  Oct 29, 1986 by lwall@sdcrdcf.UUCP in mirror:net.sources.bu */
/* ---------- "patch 2.0 patch #1" ---------- */
System: patch version 2.0
Patch #: 1
Priority: MEDIUM
Subject: Backwards scan for place to insert hunk can give up prematurely
From: dorab@ucla-cs.uucp (Dorab Patel)

Description:
	Under certain circumstances patch can fail to find the correct
	location to install a hunk.  If the proper place to insert a hunk
	is more lines backwards than the number of lines left in the input
	file from the place it first starts searching from, patch gives up
	because of a more-or-less typographical error.

Fix:	From rn, say "| patch -d DIR", where DIR is your patch source
	directory.  Outside of rn, say "cd DIR; patch <thisarticle".
	If you don't have the patch program, apply the following by hand,
	or get patch.

	If patch indicates that patchlevel is the wrong version, you may need
	to apply one or more previous patches, or the patch may already
	have been applied.  See the patchlevel.h file to find out what has or
	has not been applied.  In any event, don't continue with the patch.

Index: patchlevel.h
Prereq: 0
1c1
< #define PATCHLEVEL 0
---
> #define PATCHLEVEL 1
 
Index: patch.c
Prereq: 2.0
*** patch.c.old	Wed Oct 29 13:50:40 1986
*** patch.c	Wed Oct 29 13:50:45 1986
***************
*** 1,5
  char rcsid[] =
! 	"$Header: patch.c,v 2.0 86/09/17 15:37:32 lwall Exp $";
  
  /* patch - a program to apply diffs to original files
   *

--- 1,5 -----
  char rcsid[] =
! 	"$Header: patch.c,v 2.0.1.1 86/10/29 13:10:22 lwall Exp $";
  
  /* patch - a program to apply diffs to original files
   *
***************
*** 9,14
   * money off of it, or pretend that you wrote it.
   *
   * $Log:	patch.c,v $
   * Revision 2.0  86/09/17  15:37:32  lwall
   * Baseline for netwide release.
   * 

--- 9,17 -----
   * money off of it, or pretend that you wrote it.
   *
   * $Log:	patch.c,v $
+  * Revision 2.0.1.1  86/10/29  13:10:22  lwall
+  * Backwards search could terminate prematurely.
+  * 
   * Revision 2.0  86/09/17  15:37:32  lwall
   * Baseline for netwide release.
   * 
***************
*** 454,460
  	return first_guess;
      for (offset = 1; ; offset++) {
  	Reg5 bool check_after = (offset <= max_pos_offset);
! 	Reg6 bool check_before = (offset <= max_pos_offset);
  
  	if (check_after && patch_match(first_guess, offset, fuzz)) {
  #ifdef DEBUGGING

--- 457,463 -----
  	return first_guess;
      for (offset = 1; ; offset++) {
  	Reg5 bool check_after = (offset <= max_pos_offset);
! 	Reg6 bool check_before = (offset <= max_neg_offset);
  
  	if (check_after && patch_match(first_guess, offset, fuzz)) {
  #ifdef DEBUGGING
/* End of text from mirror:net.sources.bu */