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lib/libc/string/strerror_s.c
- This file was added.
| /* | |||||
| * Copyright (c) 2017 Juniper Networks. 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. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. | |||||
| */ | |||||
| #include <sys/cdefs.h> | |||||
| __FBSDID("$FreeBSD$"); | |||||
| #include <errno.h> | |||||
| #include <stdint.h> | |||||
| #include <string.h> | |||||
| #include "libc_private.h" | |||||
| /* ISO/IEC 9899:2011 K.3.7.4.2 */ | |||||
| errno_t strerror_s(char *s, rsize_t maxsize, errno_t errnum) | |||||
| { | |||||
| errno_t ret; | |||||
| size_t err_len; | |||||
| char *err_str; | |||||
| char *e = "..."; | |||||
| ret = EINVAL; | |||||
| if (s == NULL) { | |||||
| __throw_constraint_handler_s("strerror_s : s is NULL", ret); | |||||
| } else if (maxsize > RSIZE_MAX) { | |||||
| __throw_constraint_handler_s( | |||||
| "strerror_s : maxsize > RSIZE_MAX", ret); | |||||
| } else if (maxsize == 0) { | |||||
| __throw_constraint_handler_s("strerror_s : maxsize == 0", ret); | |||||
| } else { | |||||
| err_len = strerrorlen_s(errnum)+1; | |||||
| err_str = strerror(errnum); | |||||
| if (err_len <= maxsize) { | |||||
| strcpy_s(s, err_len, err_str); | |||||
| ret = 0; | |||||
| } else { | |||||
| if (maxsize < 5) { | |||||
| strcpy_s(s, maxsize, &e[4-maxsize]); | |||||
| } else { | |||||
| /* | |||||
| * err_str is going to be truncated | |||||
| * use normal call | |||||
| */ | |||||
| strncpy(s, err_str, maxsize - 4); | |||||
| /* | |||||
| * strncpy does not null terminate | |||||
| * so advance to end | |||||
| */ | |||||
| strcpy_s(&s[maxsize - 4], 4, e); | |||||
| } | |||||
| } | |||||
| } | |||||
| return (ret); | |||||
| } | |||||