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Sync to latest strlcpy() from OpenBSD

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Job Snijders
2021-08-17 11:58:19 +00:00
parent 6f7a8db6aa
commit dee79b0408
1 changed files with 29 additions and 51 deletions
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80
compat/strlcpy.c
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@@ -1,72 +1,50 @@
/* $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $ */ /* $OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $ */
/* /*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
* All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Permission to use, copy, modify, and distribute this software for any
* modification, are permitted provided that the following conditions * purpose with or without fee is hereby granted, provided that the above
* are met: * copyright notice and this permission notice appear in all copies.
* 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, * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* 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 HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef HAVE_STRLCPY
#include <sys/types.h> #include <sys/types.h>
#include <string.h> #include <string.h>
/* /*
* Copy src to string dst of size siz. At most siz-1 characters * Copy string src to buffer dst of size dsize. At most dsize-1
* will be copied. Always NUL terminates (unless siz == 0). * chars will be copied. Always NUL terminates (unless dsize == 0).
* Returns strlen(src); if retval >= siz, truncation occurred. * Returns strlen(src); if retval >= dsize, truncation occurred.
*/ */
size_t size_t
strlcpy(dst, src, siz) strlcpy(char *dst, const char *src, size_t dsize)
char *dst;
const char *src;
size_t siz;
{ {
char *d = dst; const char *osrc = src;
const char *s = src; size_t nleft = dsize;
size_t n = siz;
/* Copy as many bytes as will fit */ /* Copy as many bytes as will fit. */
if (n != 0 && --n != 0) { if (nleft != 0) {
do { while (--nleft != 0) {
if ((*d++ = *s++) == 0) if ((*dst++ = *src++) == '\0')
break; break;
} while (--n != 0); }
} }
/* Not enough room in dst, add NUL and traverse rest of src */ /* Not enough room in dst, add NUL and traverse rest of src. */
if (n == 0) { if (nleft == 0) {
if (siz != 0) if (dsize != 0)
*d = '\0'; /* NUL-terminate dst */ *dst = '\0'; /* NUL-terminate dst */
while (*s++) while (*src++)
; ;
} }
return(s - src - 1); /* count does not include NUL */ return(src - osrc - 1); /* count does not include NUL */
} }
#endif