| /* $OpenBSD: strlcpy.c,v 1.13 2015/08/31 02:53:57 guenther Exp $ */ |
| |
| /* |
| * Copyright (c) 1998, 2015 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 THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 <string.h> |
| #include <sys/types.h> |
| |
| /* |
| * Copy string src to buffer dst of size dsize. At most dsize-1 |
| * chars will be copied. Always NUL terminates (unless dsize == 0). |
| * Returns strlen(src); if retval >= dsize, truncation occurred. |
| */ |
| size_t __strlcpy(char *dst, const char *src, size_t dsize) |
| { |
| const char *osrc = src; |
| size_t nleft = dsize; |
| |
| /* Copy as many bytes as will fit. */ |
| if (nleft != 0) { |
| while (--nleft != 0) { |
| *dst++ = *src; |
| if (*src++ == '\0') |
| break; |
| } |
| } |
| |
| /* Not enough room in dst, add NUL and traverse rest of src. */ |
| if (nleft == 0) { |
| if (dsize != 0) |
| *dst = '\0'; /* NUL-terminate dst */ |
| while (*src++) |
| ; |
| } |
| |
| return (src - osrc - 1); /* count does not include NUL */ |
| } |
| weak_alias(__strlcpy, strlcpy) |
