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90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* Copyright (C) 2006-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/poll.h>
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#include <kernel-features.h>
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#include <sysdep-cancel.h>
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#ifdef __NR_pselect6
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# ifndef __ASSUME_PSELECT
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static int __generic_pselect (int nfds, fd_set *readfds, fd_set *writefds,
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fd_set *exceptfds,
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const struct timespec *timeout,
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const sigset_t *sigmask);
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# endif
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int
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__pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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const struct timespec *timeout, const sigset_t *sigmask)
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{
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/* The Linux kernel can in some situations update the timeout value.
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We do not want that so use a local variable. */
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struct timespec tval;
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if (timeout != NULL)
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{
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tval = *timeout;
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timeout = &tval;
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}
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/* Note: the system call expects 7 values but on most architectures
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we can only pass in 6 directly. If there is an architecture with
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support for more parameters a new version of this file needs to
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be created. */
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struct
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{
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__syscall_ulong_t ss;
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__syscall_ulong_t ss_len;
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} data;
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data.ss = (__syscall_ulong_t) (uintptr_t) sigmask;
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data.ss_len = _NSIG / 8;
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int result;
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#ifndef CALL_PSELECT6
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# define CALL_PSELECT6(nfds, readfds, writefds, exceptfds, timeout, data) \
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SYSCALL_CANCEL (pselect6, nfds, readfds, writefds, exceptfds, timeout, data)
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#endif
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result = CALL_PSELECT6 (nfds, readfds, writefds, exceptfds, timeout,
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&data);
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# ifndef __ASSUME_PSELECT
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if (result == -1 && errno == ENOSYS)
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result = __generic_pselect (nfds, readfds, writefds, exceptfds, timeout,
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sigmask);
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# endif
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return result;
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}
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weak_alias (__pselect, pselect)
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# ifndef __ASSUME_PSELECT
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# define __pselect static __generic_pselect
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# endif
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#endif
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#ifndef __ASSUME_PSELECT
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# include <misc/pselect.c>
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#endif
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