blob: bc7e265ce9b2b286abba231b7f1a580600abb4ee [file] [log] [blame]
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
/// @assertion Stream<ProcessSignal> watch()
/// Watch for process signals.
/// The following ProcessSignals can be listened to:
/// - ProcessSignal.sighup.
/// - ProcessSignal.sigint. Signal sent by e.g. CTRL-C.
/// - ProcessSignal.sigterm. Not available on Windows.
/// - ProcessSignal.sigusr1. Not available on Windows.
/// - ProcessSignal.sigusr2. Not available on Windows.
/// - ProcessSignal.sigwinch. Not available on Windows.
///
/// Other signals are disallowed, as they may be used by the VM.
///
/// A signal can be watched multiple times, from multiple isolates, where all
/// callbacks are invoked when signaled, in no specific order.
///
/// @description Checks that mention ProcessSignals can be watched.
/// @author ngl@unipro.ru
import 'dart:convert';
import "dart:io";
import "dart:async";
import "../../../Utils/expect.dart";
check(ProcessSignal signal) {
String executable = Platform.resolvedExecutable;
String eScript = Platform.script.toString();
asyncStart();
Process.start(executable, [
...Platform.executableArguments,
eScript,
signal.toString()
]).then((process) {
process.stdin.close();
process.stderr.drain();
var output = "";
process.stdout.transform(utf8.decoder).listen((str) {
output += str;
if (output == 'done\n') {
process.kill(signal);
}
}, onDone: () {
Expect.equals('done\n$signal\n', output);
});
process.exitCode.then((exitCode) {
Expect.equals(0, exitCode);
asyncEnd();
});
});
}
runMain() {
if (!Platform.isWindows) {
check(ProcessSignal.sighup);
check(ProcessSignal.sigint);
check(ProcessSignal.sigterm);
check(ProcessSignal.sigusr1);
check(ProcessSignal.sigusr2);
check(ProcessSignal.sigwinch);
}
}
runProcess(List<String> args) {
// This process should die if it never receives a signal.
var timeout = new Timer(new Duration(seconds: 5), () => exit(1));
for (var arg in args) {
var signal;
switch (arg) {
case 'SIGHUP':
signal = ProcessSignal.sighup;
break;
case 'SIGINT':
signal = ProcessSignal.sigint;
break;
case 'SIGTERM':
signal = ProcessSignal.sigterm;
break;
case 'SIGUSR1':
signal = ProcessSignal.sigusr1;
break;
case 'SIGUSR2':
signal = ProcessSignal.sigusr2;
break;
case 'SIGWINCH':
signal = ProcessSignal.sigwinch;
break;
}
signal.watch().first.then((s) {
if (signal != s) exit(1);
if (signal.toString() != arg) exit(1);
print(signal);
exit(0);
});
}
print("done");
}
main(List<String> args) {
if (args.length > 0)
runProcess(args);
else {
runMain();
}
}