xref: /illumos-gate/usr/src/lib/libc/port/gen/strlcpy.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 #include "lint.h"
28 #include <string.h>
29 #include <sys/types.h>
30 
31 /*
32  * Copies src to the dstsize buffer at dst. The copy will never
33  * overflow the destination buffer and the buffer will always be null
34  * terminated.
35  */
36 
37 size_t
38 strlcpy(char *dst, const char *src, size_t len)
39 {
40 	size_t slen = strlen(src);
41 	size_t copied;
42 
43 	if (len == 0)
44 		return (slen);
45 
46 	if (slen >= len)
47 		copied = len - 1;
48 	else
49 		copied = slen;
50 	(void) memcpy(dst, src, copied);
51 	dst[copied] = '\0';
52 	return (slen);
53 }
54