1: /* $Header: warn.c,v 1.2 85/03/25 12:36:56 nicklin Exp $ */
   2: 
   3: /*
   4:  * Author: Peter J. Nicklin
   5:  */
   6: 
   7: /*
   8:  * warn() places an error message on the standard error output stream
   9:  * stderr.
  10:  */
  11: #include <stdio.h>
  12: #include "null.h"
  13: 
  14: extern char *PGN;           /* program name */
  15: 
  16: warn(m)
  17:     char *m;            /* warning message */
  18: {
  19:     if (PGN != NULL && *PGN != '\0')
  20:         fprintf(stderr, "%s: ", PGN);
  21:     fprintf(stderr, "%s\n", m);
  22: }
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