+/* ErrCode.c
+ *
+ * Copyright (C) 2001 Simone Piccardi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
/****************************************************************
*
* Program ErrCode.c:
*
* Usage: errcode -h give all info's
*
- * $Id: ErrCode.c,v 1.1 2001/09/09 17:39:15 piccardi Exp $
+ * $Id: ErrCode.c,v 1.8 2003/07/27 14:28:19 piccardi Exp $
*
****************************************************************/
/*
#include <unistd.h> /* unix standard library */
#include <stdio.h> /* standard I/O library */
#include <string.h> /* string functions */
+#include <limits.h> /* system limits values */
/* Help printing routine */
void usage(void);
if (optind == argc) {
usage();
}
- err = atoi(argv[optind]);
+ /* convert string to number */
+ err = strtol(argv[optind], NULL, 10);
+ /* testing error condition on conversion */
+ if (err==LONG_MIN) {
+ perror("Underflow on error code");
+ return 1;
+ } else if (err==LONG_MIN) {
+ perror("Overflow on error code");
+ return 1;
+ }
+ /* conversion is fine */
if (message) {
printf("Error message for %d is %s\n", err, strerror(err));
}
void usage(void) {
printf("Print error code message or macro label \n");
printf("Usage:\n");
- printf(" daytime [-h] [-l] [-m] error code \n");
+ printf(" errcode [-h] [-l] [-m] error code \n");
printf(" -m print error messages\n");
printf(" -l print error code label\n");
printf(" -h print this help\n");