rn 4.3 patch #22

[Larry Wall]

System: rn version 4.3
Patch #: 22
Priority: MEDIUM
Subject: Patch #14 causes malloc mixups on "rn -c"
From: dsp at ptsfa.UUCP (David St. Pierre), landauer at drivax.UUCP (Doug Landauer)

Description:
	Patch #14 attempted to speed up "rn -c" by using a static buffer
	instead of an malloc'ed one.  Unfortunately, buried deep down in
	a routine called checkexpired there was an unguarded call to free().
	This can confuse malloc if there is more than one newsgroup with
	expired articles to account for.

Fix:	From rn, say "| patch -d DIR", where DIR is your rn 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 file to find out what has or
	has not been applied.  In any event, don't continue with the patch.

Index: patchlevel
Prereq: 21
1c1
< Patch #: 21
---
> Patch #: 22

Index: rcln.c
Prereq: 4.3
*** rcln.c.old	Tue Jul 23 17:40:30 1985
--- rcln.c	Tue Jul 23 17:40:33 1985
***************
*** 1,4
! /* $Header: rcln.c,v 4.3 85/05/01 11:45:36 lwall Exp $
   *
   * $Log:	rcln.c,v $
   * Revision 4.3  85/05/01  11:45:36  lwall

--- 1,4 -----
! /* $Header: rcln.c,v 4.3.1.2 85/07/23 17:39:08 lwall Exp $
   *
   * $Log:	rcln.c,v $
   * Revision 4.3.1.2  85/07/23  17:39:08  lwall
***************
*** 1,6
  /* $Header: rcln.c,v 4.3 85/05/01 11:45:36 lwall Exp $
   *
   * $Log:	rcln.c,v $
   * Revision 4.3  85/05/01  11:45:36  lwall
   * Baseline for release with 4.3bsd.
   * 

--- 1,12 -----
  /* $Header: rcln.c,v 4.3.1.2 85/07/23 17:39:08 lwall Exp $
   *
   * $Log:	rcln.c,v $
+  * Revision 4.3.1.2  85/07/23  17:39:08  lwall
+  * Oops, was freeing a static buf on -c in checkexpired.
+  * 
+  * Revision 4.3.1.1  85/05/10  11:37:08  lwall
+  * Branch for patches.
+  * 
   * Revision 4.3  85/05/01  11:45:36  lwall
   * Baseline for release with 4.3bsd.
   * 
***************
*** 426,432
  	    (MEM_SIZE)(rcnums[ngnum] + strlen(newnum) + 1));
      }
      else {
! 	free(rcline[ngnum]);
  	rcline[ngnum] = mbuf;
      }
  

--- 432,439 -----
  	    (MEM_SIZE)(rcnums[ngnum] + strlen(newnum) + 1));
      }
      else {
! 	if (!checkflag)
! 	    free(rcline[ngnum]);
  	rcline[ngnum] = mbuf;
      }