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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1990 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * Concatenate s2 on the end of s1. S1's space must be large enough.
31 * At most n characters are moved.
32 * Return s1.
33 */
34
35 char *
strncat(char * s1,char * s2,int n)36 strncat(char *s1, char *s2, int n)
37 {
38 char *os1;
39
40 os1 = s1;
41 while (*s1++)
42 ;
43 --s1;
44 while (*s1++ = *s2++)
45 if (--n < 0) {
46 *--s1 = '\0';
47 break;
48 }
49 return (os1);
50 }
51