1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 #include "lint.h"
31 #include <string.h>
32 #include <sys/types.h>
33
34 /*
35 * Concatenate s2 on the end of s1. S1's space must be large enough.
36 * At most n characters are moved.
37 * Return s1.
38 */
39 char *
strncat(char * s1,const char * s2,size_t n)40 strncat(char *s1, const char *s2, size_t n)
41 {
42 char *os1 = s1;
43
44 n++;
45 while (*s1++)
46 ;
47 --s1;
48 while (*s1++ = *s2++)
49 if (--n == 0) {
50 s1[-1] = '\0';
51 break;
52 }
53 return (os1);
54 }
55