# This is a patch for SCWRL (Version 2.1   March 17, 1998)
# It modifies util.c to provide error checking during the opening of the
# rotamer library.  Previously, attempts to open non-existant files were
# not caught and various runtime errors resulted.

# To apply this patch:
# $ cd scwrl
# $ patch < this-file
# $ make
# It is sufficient to recompile util.c and relink.

# 1998/06/24 21:06 Reece Kimball Hart <reece@in-machina.com>

*** util.c.~1~	Tue Mar 17 17:20:15 1998
--- util.c	Wed Jun 24 21:34:08 1998
***************
*** 1,5 ****
--- 1,6 ----
  #include "scwrl.h"
  #include "build.h"
+ #include <errno.h>
  
  void
  help()
***************
*** 384,391 ****
  
    /* Open database files */
    sprintf(libfilename,"%s/scwrlbin34.lib",LIBRARY);
!   datafile = fopen(libfilename,"rb");
!   
    for (i = 0;i<nres;i++){
      
      if (conserved[i]){
--- 385,396 ----
  
    /* Open database files */
    sprintf(libfilename,"%s/scwrlbin34.lib",LIBRARY);
!   if (! (datafile = fopen(libfilename,"rb")) )
! 	{
! 	fprintf(stderr, "scwrl: %s: %s\n", libfilename, strerror(errno));
! 	exit(1);
! 	}
! 
    for (i = 0;i<nres;i++){
      
      if (conserved[i]){