1: /* $Header: badopt.c,v 1.2 85/04/02 07:45:43 nicklin Exp $ */ 2: 3: /* 4: * Author: Peter J. Nicklin 5: */ 6: 7: /* 8: * badopt() places a "bad option" error message on the standard error 9: * output stream stderr. 10: */ 11: #include <stdio.h> 12: #include "null.h" 13: 14: extern char *PGN; /* program name */ 15: 16: badopt(sign, c) 17: char c; /* offending option */ 18: char sign; /* '+' or '-' sign preceding option */ 19: { 20: if (PGN != NULL && *PGN != '\0') 21: fprintf(stderr, "%s: ", PGN); 22: fprintf(stderr, "bad option %c%c\n", sign, c); 23: }