xref: /illumos-gate/usr/src/lib/libc/port/gen/strlcpy.c (revision 03100a6332bd4edc7a53091fcf7c9a7131bcdaa7)
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 2004 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 "synonyms.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