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94a83d8667
The syscall __NR_sigtimedwait_time64 (for 32-bit) or __NR_sigtimedwait (for 64-bit) is used as default. The 32-bit fallback is used iff __ASSUME_TIME64_SYSCALLS is not defined, which assumes the kernel ABI provides either __NR_rt_sigtimedwait (32-bit time_t). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 <signal.h>
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#include <sysdep.h>
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int
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__sigtimedwait64 (const sigset_t *set, siginfo_t *info,
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const struct __timespec64 *timeout)
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{
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#ifndef __NR_rt_sigtimedwait_time64
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# define __NR_rt_sigtimedwait_time64 __NR_rt_sigtimedwait
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#endif
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int result = SYSCALL_CANCEL (rt_sigtimedwait_time64, set, info, timeout,
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__NSIG_BYTES);
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#ifndef __ASSUME_TIME64_SYSCALLS
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if (result != 0 && errno == ENOSYS)
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{
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struct timespec ts32, *pts32 = NULL;
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if (timeout != NULL)
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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 (EINVAL);
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return -1;
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}
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ts32 = valid_timespec64_to_timespec (*timeout);
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pts32 = &ts32;
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}
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result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, pts32,
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__NSIG_BYTES);
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}
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#endif
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/* The kernel generates a SI_TKILL code in si_code in case tkill is
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used. tkill is transparently used in raise(). Since having
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SI_TKILL as a code is useful in general we fold the results
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here. */
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if (result != -1 && info != NULL && info->si_code == SI_TKILL)
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info->si_code = SI_USER;
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return result;
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__sigtimedwait64)
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int
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__sigtimedwait (const sigset_t *set, siginfo_t *info,
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const struct timespec *timeout)
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{
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struct __timespec64 ts64, *pts64 = NULL;
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if (timeout != NULL)
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{
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ts64 = valid_timespec_to_timespec64 (*timeout);
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pts64 = &ts64;
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}
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return __sigtimedwait64 (set, info, pts64);
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}
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#endif
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libc_hidden_def (__sigtimedwait)
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weak_alias (__sigtimedwait, sigtimedwait)
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