xref: /illumos-gate/usr/src/lib/libc/port/gen/strlcpy.c (revision 6e375c8351497b82ffa4f33cbf61d712999b4605)
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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include "lint.h"
30 #include <string.h>
31 #include <sys/types.h>
32 
33 /*
34  * Copies src to the dstsize buffer at dst. The copy will never
35  * overflow the destination buffer and the buffer will always be null
36  * terminated.
37  */
38 
39 size_t
40 strlcpy(char *dst, const char *src, size_t len)
41 {
42 	size_t slen = strlen(src);
43 	size_t copied;
44 
45 	if (len == 0)
46 		return (slen);
47 
48 	if (slen >= len)
49 		copied = len - 1;
50 	else
51 		copied = slen;
52 	(void) memcpy(dst, src, copied);
53 	dst[copied] = '\0';
54 	return (slen);
55 }
56