strndup.c revision 203391
1185690Skib/* $NetBSD: strndup.c,v 1.3 2007/01/14 23:41:24 cbiere Exp $ */ 2185690Skib 3185690Skib/* 4185690Skib * Copyright (c) 1988, 1993 5185690Skib * The Regents of the University of California. All rights reserved. 6185690Skib * 7185690Skib * Redistribution and use in source and binary forms, with or without 8185690Skib * modification, are permitted provided that the following conditions 9185690Skib * are met: 10185690Skib * 1. Redistributions of source code must retain the above copyright 11185690Skib * notice, this list of conditions and the following disclaimer. 12185690Skib * 2. Redistributions in binary form must reproduce the above copyright 13185690Skib * notice, this list of conditions and the following disclaimer in the 14185690Skib * documentation and/or other materials provided with the distribution. 15185690Skib * 4. Neither the name of the University nor the names of its contributors 16185690Skib * may be used to endorse or promote products derived from this software 17185690Skib * without specific prior written permission. 18185690Skib * 19185690Skib * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20185690Skib * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21185690Skib * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22185690Skib * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23185690Skib * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24185690Skib * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25185690Skib * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26185690Skib * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27185690Skib * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28185690Skib * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29185690Skib * SUCH DAMAGE. 30185690Skib */ 31185690Skib 32185690Skib#include <sys/cdefs.h> 33185690Skib__FBSDID("$FreeBSD: head/lib/libc/string/strndup.c 203391 2010-02-02 19:02:08Z ed $"); 34185690Skib 35185690Skib#include <stddef.h> 36185690Skib#include <stdlib.h> 37185690Skib#include <string.h> 38185690Skib 39185690Skibchar * 40185690Skibstrndup(const char *str, size_t n) 41185690Skib{ 42185690Skib size_t len; 43185690Skib char *copy; 44185690Skib 45203391Sed len = strnlen(str, n); 46185690Skib if ((copy = malloc(len + 1)) == NULL) 47185690Skib return (NULL); 48185690Skib memcpy(copy, str, len); 49185690Skib copy[len] = '\0'; 50185690Skib return (copy); 51185690Skib} 52