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/* Checking macros for poll functions.
Copyright (C) 2012-2020 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/>. */
#ifndef _SYS_POLL_H
# error "Never include <bits/poll2.h> directly; use <sys/poll.h> instead."
#endif
__BEGIN_DECLS
extern int __REDIRECT (__poll_alias, (struct pollfd *__fds, nfds_t __nfds,
int __timeout), poll);
extern int __poll_chk (struct pollfd *__fds, nfds_t __nfds, int __timeout,
__SIZE_TYPE__ __fdslen);
extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
int __timeout, __SIZE_TYPE__ __fdslen),
__poll_chk)
__warnattr ("poll called with fds buffer too small file nfds entries");
__fortify_function int
poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
{
if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
{
if (! __builtin_constant_p (__nfds))
return __poll_chk (__fds, __nfds, __timeout, __glibc_objsize (__fds));
else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
return __poll_chk_warn (__fds, __nfds, __timeout,
__glibc_objsize (__fds));
}
return __poll_alias (__fds, __nfds, __timeout);
}
#ifdef __USE_GNU
extern int __REDIRECT (__ppoll_alias, (struct pollfd *__fds, nfds_t __nfds,
const struct timespec *__timeout,
const __sigset_t *__ss), ppoll);
extern int __ppoll_chk (struct pollfd *__fds, nfds_t __nfds,
const struct timespec *__timeout,
const __sigset_t *__ss, __SIZE_TYPE__ __fdslen);
extern int __REDIRECT (__ppoll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
const struct timespec *__timeout,
const __sigset_t *__ss,
__SIZE_TYPE__ __fdslen),
__ppoll_chk)
__warnattr ("ppoll called with fds buffer too small file nfds entries");
__fortify_function int
ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
const __sigset_t *__ss)
{
if (__glibc_objsize (__fds) != (__SIZE_TYPE__) -1)
{
if (! __builtin_constant_p (__nfds))
return __ppoll_chk (__fds, __nfds, __timeout, __ss,
__glibc_objsize (__fds));
else if (__glibc_objsize (__fds) / sizeof (*__fds) < __nfds)
return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss,
__glibc_objsize (__fds));
}
return __ppoll_alias (__fds, __nfds, __timeout, __ss);
}
#endif
__END_DECLS
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