52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
|
/* $OpenBSD: strlcpy.c,v 1.7 2003/04/12 21:56:39 millert Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
|
||
|
|
*
|
||
|
|
* Permission to use, copy, modify, and distribute this software for any
|
||
|
|
* purpose with or without fee is hereby granted, provided that the above
|
||
|
|
* copyright notice and this permission notice appear in all copies.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
|
||
|
|
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
||
|
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
|
||
|
|
* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
||
|
|
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
||
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copy src to string dst of size siz. At most siz-1 characters
|
||
|
|
* will be copied. Always NUL terminates (unless siz == 0).
|
||
|
|
* Returns strlen(src); if retval >= siz, truncation occurred.
|
||
|
|
*/
|
||
|
|
size_t
|
||
|
|
strlcpy(char *dst, const char *src, size_t siz)
|
||
|
|
{
|
||
|
|
char *d = dst;
|
||
|
|
const char *s = src;
|
||
|
|
size_t n = siz;
|
||
|
|
|
||
|
|
/* Copy as many bytes as will fit */
|
||
|
|
if (n != 0 && --n != 0) {
|
||
|
|
do {
|
||
|
|
if ((*d++ = *s++) == 0)
|
||
|
|
break;
|
||
|
|
} while (--n != 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Not enough room in dst, add NUL and traverse rest of src */
|
||
|
|
if (n == 0) {
|
||
|
|
if (siz != 0)
|
||
|
|
*d = '\0'; /* NUL-terminate dst */
|
||
|
|
while (*s++)
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(s - src - 1); /* count does not include NUL */
|
||
|
|
}
|