1*4a5d661aSToomas Soome /*-
2*4a5d661aSToomas Soome * Copyright (c) 1990, 1993
3*4a5d661aSToomas Soome * The Regents of the University of California. All rights reserved.
4*4a5d661aSToomas Soome *
5*4a5d661aSToomas Soome * This code is derived from software contributed to Berkeley by
6*4a5d661aSToomas Soome * Chris Torek.
7*4a5d661aSToomas Soome *
8*4a5d661aSToomas Soome * Redistribution and use in source and binary forms, with or without
9*4a5d661aSToomas Soome * modification, are permitted provided that the following conditions
10*4a5d661aSToomas Soome * are met:
11*4a5d661aSToomas Soome * 1. Redistributions of source code must retain the above copyright
12*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer.
13*4a5d661aSToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
14*4a5d661aSToomas Soome * notice, this list of conditions and the following disclaimer in the
15*4a5d661aSToomas Soome * documentation and/or other materials provided with the distribution.
16*4a5d661aSToomas Soome * 3. Neither the name of the University nor the names of its contributors
17*4a5d661aSToomas Soome * may be used to endorse or promote products derived from this software
18*4a5d661aSToomas Soome * without specific prior written permission.
19*4a5d661aSToomas Soome *
20*4a5d661aSToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21*4a5d661aSToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22*4a5d661aSToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23*4a5d661aSToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24*4a5d661aSToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25*4a5d661aSToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26*4a5d661aSToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27*4a5d661aSToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28*4a5d661aSToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29*4a5d661aSToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30*4a5d661aSToomas Soome * SUCH DAMAGE.
31*4a5d661aSToomas Soome */
32*4a5d661aSToomas Soome
33*4a5d661aSToomas Soome #if defined(LIBC_SCCS) && !defined(lint)
34*4a5d661aSToomas Soome static char sccsid[] = "@(#)strncpy.c 8.1 (Berkeley) 6/4/93";
35*4a5d661aSToomas Soome #endif /* LIBC_SCCS and not lint */
36*4a5d661aSToomas Soome #include <sys/cdefs.h>
37*4a5d661aSToomas Soome __FBSDID("$FreeBSD$");
38*4a5d661aSToomas Soome
39*4a5d661aSToomas Soome #include <string.h>
40*4a5d661aSToomas Soome
41*4a5d661aSToomas Soome /*
42*4a5d661aSToomas Soome * Copy src to dst, truncating or null-padding to always copy n bytes.
43*4a5d661aSToomas Soome * Return dst.
44*4a5d661aSToomas Soome */
45*4a5d661aSToomas Soome char *
strncpy(char * __restrict dst,const char * __restrict src,size_t n)46*4a5d661aSToomas Soome strncpy(char * __restrict dst, const char * __restrict src, size_t n)
47*4a5d661aSToomas Soome {
48*4a5d661aSToomas Soome if (n != 0) {
49*4a5d661aSToomas Soome char *d = dst;
50*4a5d661aSToomas Soome const char *s = src;
51*4a5d661aSToomas Soome
52*4a5d661aSToomas Soome do {
53*4a5d661aSToomas Soome if ((*d++ = *s++) == '\0') {
54*4a5d661aSToomas Soome /* NUL pad the remaining n-1 bytes */
55*4a5d661aSToomas Soome while (--n != 0)
56*4a5d661aSToomas Soome *d++ = '\0';
57*4a5d661aSToomas Soome break;
58*4a5d661aSToomas Soome }
59*4a5d661aSToomas Soome } while (--n != 0);
60*4a5d661aSToomas Soome }
61*4a5d661aSToomas Soome return (dst);
62*4a5d661aSToomas Soome }
63