mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-15 18:12:42 +00:00
0d748ad58e
This change fixes Cosmopolitan so it has fewer opinions about compiler warnings. The whole repository had to be cleaned up to be buildable in -Werror -Wall mode. This lets us benefit from things like strict const checking. Some actual bugs might have been caught too.
82 lines
3.9 KiB
C
82 lines
3.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/sigtimedwait.h"
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#include "libc/calls/asan.internal.h"
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#include "libc/calls/cp.internal.h"
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#include "libc/calls/sigtimedwait.internal.h"
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#include "libc/calls/struct/siginfo.internal.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Waits for signal synchronously, w/ timeout.
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*
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* @param set is signals for which we'll be waiting
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* @param info if not null shall receive info about signal
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* @param timeout is relative deadline and null means wait forever
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* @return signal number on success, or -1 w/ errno
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* @raise EINTR if an asynchronous signal was delivered instead
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* @raise ECANCELED if thread was cancelled in masked mode
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* @raise EINVAL if nanoseconds parameter was out of range
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* @raise EAGAIN if deadline expired
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* @raise ENOSYS on Windows, XNU, OpenBSD, Metal
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* @raise EFAULT if invalid memory was supplied
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* @cancellationpoint
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*/
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int sigtimedwait(const sigset_t *set, siginfo_t *info,
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const struct timespec *timeout) {
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int rc;
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char strsig[21];
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struct timespec ts;
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union siginfo_meta si = {0};
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BEGIN_CANCELLATION_POINT;
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(void)strsig;
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if (IsAsan() && (!__asan_is_valid(set, sizeof(*set)) ||
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(info && !__asan_is_valid(info, sizeof(*info))) ||
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(timeout && !__asan_is_valid_timespec(timeout)))) {
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rc = efault();
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} else if (IsLinux() || IsFreebsd() || IsNetbsd()) {
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if (timeout) {
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// 1. Linux needs its size parameter
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// 2. NetBSD modifies timeout argument
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ts = *timeout;
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rc = sys_sigtimedwait(set, &si, &ts, 8);
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} else {
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rc = sys_sigtimedwait(set, &si, 0, 8);
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}
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if (rc != -1 && info) {
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__siginfo2cosmo(info, &si);
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}
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} else {
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rc = enosys();
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}
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END_CANCELLATION_POINT;
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STRACE("sigtimedwait(%s, [%s], %s) → %s% m", DescribeSigset(0, set),
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DescribeSiginfo(rc, info), DescribeTimespec(0, timeout),
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strsignal_r(rc, strsig));
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return rc;
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}
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