2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 2017, 2018
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include "namespace.h"
45 #include "un-namespace.h"
46 #include "libc_private.h"
50 _gets_s(char *buf, rsize_t n)
56 for (s = buf, n--; (c = __sgetc(stdin)) != '\n' && n > 0 ; n--) {
67 * If end of buffer reached, discard until \n or eof.
68 * Then throw an error.
72 while ((c = __sgetc(stdin)) != '\n' && c != EOF);
73 /* throw the error after lock released prior to exit */
74 __throw_constraint_handler_s("gets_s : end of buffer", E2BIG);
81 /* ISO/IEC 9899:2011 K.3.7.4.1 */
83 gets_s(char *buf, rsize_t n)
87 __throw_constraint_handler_s("gets_s : str is NULL", EINVAL);
89 } else if (n > RSIZE_MAX) {
90 __throw_constraint_handler_s("gets_s : n > RSIZE_MAX",
94 __throw_constraint_handler_s("gets_s : n == 0", EINVAL);
98 FLOCKFILE_CANCELSAFE(stdin);
99 ret = _gets_s(buf, n);
100 FUNLOCKFILE_CANCELSAFE();