25b73e6327
abort_handler_s() currently simply calls abort(), though the standard specifies more: "Writes an implementation-defined message to stderr which must include the string pointed to by msg and calls abort()." memset_s() is missing error condition "n > smax", and does not invoke the constraint handler after filling the buffer: "following errors are detected at runtime and call the currently installed constraint handler function after storing ch in every location of the destination range [dest, dest+destsz) if dest and destsz are themselves valid", one of the errors is "n > smax" itself. Submitted by: Yuri Pankov <yuripv@gmx.com> MFC after: 1 week Differential revision: https://reviews.freebsd.org/D11991
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*-
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* Copyright (c) 2017 Juniper Networks. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include "libc_private.h"
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/* ISO/IEC 9899:2011 K.3.7.4.1 */
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errno_t
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memset_s(void *s, rsize_t smax, int c, rsize_t n)
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{
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errno_t ret;
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rsize_t lim;
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unsigned char v;
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volatile unsigned char *dst;
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ret = EINVAL;
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lim = n < smax ? n : smax;
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v = (unsigned char)c;
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dst = (unsigned char *)s;
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if (s == NULL) {
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__throw_constraint_handler_s("memset_s : s is NULL", ret);
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} else if (smax > RSIZE_MAX) {
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__throw_constraint_handler_s("memset_s : smax > RSIZE_MAX",
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ret);
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} else if (n > RSIZE_MAX) {
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__throw_constraint_handler_s("memset_s : n > RSIZE_MAX", ret);
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} else {
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while (lim > 0)
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dst[--lim] = v;
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if (n > smax) {
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__throw_constraint_handler_s("memset_s : n > smax",
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ret);
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} else {
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ret = 0;
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}
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}
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return (ret);
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}
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