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/* Copyright (C) 2006-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
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 <errno.h>
#include <signal.h>
#include <time.h>
#include <sys/poll.h>
#include <kernel-features.h>
#include <sysdep-cancel.h>
int __pselect64 (int nfds, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, const struct __timespec64 *timeout,
const sigset_t *sigmask)
{
/* The Linux kernel can in some situations update the timeout value.
We do not want that so use a local variable. */
struct __timespec64 tval;
if (timeout != NULL)
{
tval = *timeout;
timeout = &tval;
}
/* Note: the system call expects 7 values but on most architectures
we can only pass in 6 directly. If there is an architecture with
support for more parameters a new version of this file needs to
be created. */
struct
{
__syscall_ulong_t ss;
__syscall_ulong_t ss_len;
} data;
data.ss = (__syscall_ulong_t) (uintptr_t) sigmask;
data.ss_len = _NSIG / 8;
#ifdef __ASSUME_TIME64_SYSCALLS
# ifndef __NR_pselect6_time64
# define __NR_pselect6_time64 __NR_pselect6
# endif
return SYSCALL_CANCEL (pselect6_time64, nfds, readfds, writefds, exceptfds,
timeout, &data);
#else
# ifdef __NR_ppoll_time64
int ret = SYSCALL_CANCEL (pselect6_time64, nfds, readfds, writefds,
exceptfds, timeout, &data);
if (ret >= 0 || errno != ENOSYS)
return ret;
# endif
struct timespec ts32;
if (timeout)
{
if (! in_time_t_range (timeout->tv_sec))
{
__set_errno (EOVERFLOW);
return -1;
}
ts32 = valid_timespec64_to_timespec (*timeout);
}
return SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds,
timeout ? &ts32 : NULL, &data);
#endif /* __ASSUME_TIME64_SYSCALLS */
}
#if __TIMESIZE != 64
int
__pselect (int nfds, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, const struct timespec *timeout,
const sigset_t *sigmask)
{
struct __timespec64 ts64;
if (timeout)
ts64 = valid_timespec_to_timespec64 (*timeout);
return __pselect64 (nfds, readfds, writefds, exceptfds,
timeout ? &ts64 : NULL, sigmask);
}
#endif
#ifndef __pselect
weak_alias (__pselect, pselect)
#endif
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