/* $MirOS: src/lib/libc/stdlib/rpmatch.c,v 1.1 2007/05/22 15:46:19 tg Exp $ */

/*-
 * Copyright (c) 2007
 *	Thorsten Glaser <tg@mirbsd.de>
 *
 * Provided that these terms and disclaimer and all copyright notices
 * are retained or reproduced in an accompanying document, permission
 * is granted to deal in this work without restriction, including un-
 * limited rights to use, publicly perform, distribute, sell, modify,
 * merge, give away, or sublicence.
 *
 * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
 * the utmost extent permitted by applicable law, neither express nor
 * implied; without malicious intent or gross negligence. In no event
 * may a licensor, author or contributor be held liable for indirect,
 * direct, other damage, loss, or other issues arising in any way out
 * of dealing in the work, even if advised of the possibility of such
 * damage or existence of a defect, except proven that it results out
 * of said person's immediate fault when using the work as intended.
 */

#define _SVID_SOURCE
#include <errno.h>
#include <stdlib.h>

int
rpmatch(const char *response)
{
	errno = 0;

	if (response != NULL)
		switch (response[0]) {
		case 'N':
		case 'n':
			return (0);
		case 'Y':
		case 'y':
			return (1);
		}
	else
		errno = EINVAL;

	return (-1);
}