mksh/strlcpy.c

55 lines
1.7 KiB
C

/*-
* Copyright (c) 2006, 2007
* Thorsten Glaser <tg@mirbsd.de>
* 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.
*
* This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
* the utmost extent permitted by applicable law, neither express nor
* implied; without malicious intent or gross negligence. In no event
* may a licensor, author or contributor be held liable for indirect,
* direct, other damage, loss, or other issues arising in any way out
* of dealing in the work, even if advised of the possibility of such
* damage or existence of a defect, except proven that it results out
* of said person's immediate fault when using the work as intended.
*/
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/strlcpy.c,v 1.2 2007/04/23 11:33:26 tg Exp $");
__RCSID("$miros: src/lib/libc/string/strlfun.c,v 1.14 2007/01/07 02:11:40 tg Exp $");
/*
* 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)
{
const char *s = src;
if (siz == 0)
goto traverse_src;
/* copy as many chars as will fit */
while (--siz && (*dst++ = *s++))
;
/* not enough room in dst */
if (siz == 0) {
/* safe to NUL-terminate dst since we copied <= siz-1 chars */
*dst = '\0';
traverse_src:
/* traverse rest of src */
while (*s++)
;
}
/* count doesn't include NUL */
return (s - src - 1);
}