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60a2e28b34
It avoid continuing issue the __NR_ppoll_time64 syscall once the kernel advertise it does not support it. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* Copyright (C) 2006-2020 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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<https://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 <sysdep-cancel.h>
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#include <kernel-features.h>
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#include <time64-support.h>
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int
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__ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout,
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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 __timespec64 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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int ret;
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if (supports_time64 ())
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{
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#ifndef __NR_ppoll_time64
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# define __NR_ppoll_time64 __NR_ppoll
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#endif
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ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask,
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__NSIG_BYTES);
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if (ret == 0 || errno != ENOSYS)
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return ret;
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mark_time64_unsupported ();
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}
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#ifndef __ASSUME_TIME64_SYSCALLS
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struct timespec ts32;
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if (timeout)
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{
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if (! in_time_t_range (timeout->tv_sec))
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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ts32 = valid_timespec64_to_timespec (*timeout);
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}
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ret = SYSCALL_CANCEL (ppoll, fds, nfds, timeout ? &ts32 : NULL, sigmask,
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__NSIG_BYTES);
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#endif
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return ret;
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__ppoll64)
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int
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__ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
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const sigset_t *sigmask)
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{
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struct __timespec64 ts64;
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if (timeout)
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ts64 = valid_timespec_to_timespec64 (*timeout);
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return __ppoll64 (fds, nfds, timeout ? &ts64 : NULL, sigmask);
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}
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#endif
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strong_alias (__ppoll, ppoll)
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libc_hidden_def (ppoll)
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