glibc/debug/fdelt_chk.c

31 lines
1.0 KiB
C

/* Copyright (C) 2011-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <sys/select.h>
long int
__fdelt_chk (long int d)
{
if (d < 0 || d >= FD_SETSIZE)
__fortify_fail ("bit out of range 0 - FD_SETSIZE on fd_set");
return d / __NFDBITS;
}
strong_alias (__fdelt_chk, __fdelt_warn)