mirror of
https://github.com/jart/cosmopolitan.git
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70 lines
3.3 KiB
C
70 lines
3.3 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/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/calls/struct/siginfo.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/spinlock.h"
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#include "libc/nt/enum/wait.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/synchronization.h"
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#include "libc/sysv/consts/sa.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/consts/sig.h"
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/**
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* Checks to see if SIGCHLD should be raised on Windows.
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* @return true if a signal was raised
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* @note yoinked by fork-nt.c
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*/
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void _check_sigchld(void) {
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siginfo_t si;
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int pids[64];
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uint32_t i, n;
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int64_t handles[64];
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__fds_lock();
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n = __sample_pids(pids, handles, true);
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__fds_unlock();
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if (!n) return;
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i = WaitForMultipleObjects(n, handles, false, 0);
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if (i == kNtWaitTimeout) return;
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if (i == kNtWaitFailed) {
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STRACE("%s failed %u", "WaitForMultipleObjects", GetLastError());
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return;
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}
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if (__sighandrvas[SIGCHLD] == (intptr_t)SIG_IGN ||
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__sighandrvas[SIGCHLD] == (intptr_t)SIG_DFL) {
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STRACE("new zombie fd=%d handle=%ld", pids[i], handles[i]);
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return;
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}
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if (__sighandflags[SIGCHLD] & SA_NOCLDWAIT) {
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STRACE("SIGCHILD SA_NOCLDWAIT fd=%d handle=%ld", pids[i], handles[i]);
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CloseHandle(handles[i]);
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__releasefd(pids[i]);
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}
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__fds_lock();
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g_fds.p[pids[i]].zombie = true;
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__fds_unlock();
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__sig_add(SIGCHLD, CLD_EXITED);
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}
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