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Use waitpid to iterate over all exited child processes. Fixes #116. Closes #117.

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This commit is contained in:
Sönke Ludwig 2019-08-21 16:18:30 +02:00
parent e1c6d99798
commit 507fb5a0c9
1 changed files with 15 additions and 6 deletions
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21
source/eventcore/drivers/posix/processes.d
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@ -258,17 +258,26 @@ final class SignalEventDriverProcesses(Loop : PosixEventLoop) : EventDriverProce
private void onSignal(FD fd)
{
import core.sys.posix.sys.wait : WNOHANG, WEXITSTATUS, waitpid;
SignalListenID lid = cast(SignalListenID)fd;
// drain the signalfd - note that multiple signals can be combined into
// a single value, so that individual siginfo results are useless for
// us
signalfd_siginfo nfo;
do {
auto ret = () @trusted { return read(cast(int)fd, &nfo, nfo.sizeof); } ();
while (() @trusted { return read(cast(int)fd, &nfo, nfo.sizeof); } () == nfo.sizeof)
{
}
if (ret == -1 && errno.among!(EAGAIN, EINPROGRESS) || ret != nfo.sizeof)
return;
// instead, use waitpid to determine all exited processes
while (true) {
int status;
auto ret = () @trusted { return waitpid(-1, &status, WNOHANG); } ();
if (ret <= 0) break;
onProcessExit(nfo.ssi_pid, nfo.ssi_status);
} while (true);
onProcessExit(ret, () @trusted { return WEXITSTATUS(status); } ());
}
}
private void onProcessExit(int system_pid, int exitCode)