| /* $OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $ */ |
| |
| /* |
| * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static char *rcsid = "$OpenBSD: strlcpy.c,v 1.5 2001/05/13 15:40:16 deraadt Exp $"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| #include <sys/types.h> |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif /* HAVE_CONFIG_H */ |
| |
| #ifndef HAVE_STRLCPY |
| #include "strlcpy-internal.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 |
| _event_strlcpy(dst, src, siz) |
| char *dst; |
| const char *src; |
| size_t siz; |
| { |
| register char *d = dst; |
| register const char *s = src; |
| register 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 */ |
| } |
| #endif |
