/* @(#)strncpy.c	1.1 06/08/17 Copyright 2006 J. Schilling */
#ifndef lint
static	char sccsid[] =
	"@(#)strncpy.c	1.1 06/08/17 Copyright 2006 J. Schilling";
#endif
/*
 *	strncpy() to be used if missing on libc
 *
 *	Copyright (c) 2006 J. Schilling
 */
/*
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * See the file CDDL.Schily.txt in this distribution for details.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file CDDL.Schily.txt from this distribution.
 */

#include <mconfig.h>
#include <standard.h>
#include <unixstd.h>
#include <libport.h>

#ifndef	HAVE_STRNCPY

EXPORT char *
strncpy(s1, s2, len)
	register char		*s1;
	register const char	*s2;
	register size_t		len;
{
	char	 *ret	= s1;

	if (++len == 0) {	/* unsigned overflow */
		--len;
		while (len-- > 0 && (*s1++ = *s2++) != '\0')
				;
		len++;
	} else {
		while (--len > 0 && (*s1++ = *s2++) != '\0')
				;
	}
	if (len > 0) {
		while (--len > 0)
			*s1++ = '\0';
	}
	return (ret);
}
#endif	/* HAVE_STRNCPY */
