1 /* $NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $ */
2 /* $OpenBSD: strlcpy.c,v 1.7 2003/04/12 21:56:39 millert Exp $ */
5 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
12 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
13 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
14 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
16 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
17 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #if defined(LIBC_SCCS) && !defined(lint)
23 __RCSID("$NetBSD: strlcpy.c,v 1.3 2007/06/04 18:19:27 christos Exp $");
24 #endif /* LIBC_SCCS and not lint */
26 #include <sys/types.h>
32 __weak_alias(strlcpy
, _strlcpy
)
38 * Copy src to string dst of size siz. At most siz-1 characters
39 * will be copied. Always NUL terminates (unless siz == 0).
40 * Returns strlen(src); if retval >= siz, truncation occurred.
43 strlcpy(char *dst
, const char *src
, size_t siz
)
49 _DIAGASSERT(dst
!= NULL
);
50 _DIAGASSERT(src
!= NULL
);
52 /* Copy as many bytes as will fit */
53 if (n
!= 0 && --n
!= 0) {
55 if ((*d
++ = *s
++) == 0)
60 /* Not enough room in dst, add NUL and traverse rest of src */
63 *d
= '\0'; /* NUL-terminate dst */
68 return(s
- src
- 1); /* count does not include NUL */