1/* Close a range of file descriptors. Linux version.
2 Copyright (C) 2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdbool.h>
20#include <stdio.h>
21#include <sys/param.h>
22#include <unistd.h>
23
24void
25__closefrom (int lowfd)
26{
27 int l = MAX (0, lowfd);
28
29 int r = __close_range (l, ~0U, 0);
30 if (r == 0)
31 return;
32
33 if (!__closefrom_fallback (l, true))
34 __fortify_fail ("closefrom failed to close a file descriptor");
35}
36weak_alias (__closefrom, closefrom)
37