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/* Copyright (C) 2006-2022 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 <sys/select.h>
#include <sysdep-cancel.h>
static int
pselect64_syscall (int nfds, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, const struct __timespec64 *timeout,
const sigset_t *sigmask)
{
#ifndef __NR_pselect6_time64
# define __NR_pselect6_time64 __NR_pselect6
#endif
/* NB: This is required by ARGIFY used in x32 internal_syscallN. */
__syscall_ulong_t data[2] =
{
(uintptr_t) sigmask, __NSIG_BYTES
};
return SYSCALL_CANCEL (pselect6_time64, nfds, readfds, writefds, exceptfds,
timeout, data);
}
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. */
#ifdef __ASSUME_TIME64_SYSCALLS
return pselect64_syscall (nfds, readfds, writefds, exceptfds, timeout,
sigmask);
#else
bool need_time64 = timeout != NULL && !in_time_t_range (timeout->tv_sec);
if (need_time64)
{
int r = pselect64_syscall (nfds, readfds, writefds, exceptfds, timeout,
sigmask);
if (r == 0 || errno != ENOSYS)
return r;
__set_errno (EOVERFLOW);
return -1;
}
return __pselect32 (nfds, readfds, writefds, exceptfds, timeout, sigmask);
#endif
}
#if __TIMESIZE != 64
libc_hidden_def (__pselect64)
int
__pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
const struct timespec *timeout, const sigset_t *sigmask)
{
struct __timespec64 ts64, *pts64 = NULL;
if (timeout != NULL)
{
ts64 = valid_timespec_to_timespec64 (*timeout);
pts64 = &ts64;
}
return __pselect64 (nfds, readfds, writefds, exceptfds, pts64, sigmask);
}
#endif
#ifndef __pselect
weak_alias (__pselect, pselect)
#endif
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