Fixed issue when child process has signal handlers installed, they where ignored.

[akotulu]

Fixed issue with child process having custom handlers. When signal is called with child process PID, it cancels the sleep but handlers wont be called. Improved default select with stream_select error check.

Simple test, commenting pcntl_async_signals will result sleep disrupted but handler wont be called. Same is with Workerman, it waits for stream_select and when signal is called it breaks the select, but handlers wont be called.

<?php
pcntl_async_signals(true);

function sig_handler(int $signal, mixed $siginfo): void
{
    var_dump($siginfo);
    echo 'Yolo';
    fwrite(STDOUT, "Received singal $signal". PHP_EOL);
    fwrite(STDERR, "Received singal $signal". PHP_EOL);
    fflush(STDOUT);
    fflush(STDERR);
}
// pm2 sends SIGINT as quit signal
pcntl_signal(SIGINT, 'sig_handler');
pcntl_signal(SIGTERM, 'sig_handler');
pcntl_signal(SIGUSR1, 'sig_handler');

while (true) {
    echo 'sleeping 100'. PHP_EOL;
    sleep(100);
    echo 'woke up'. PHP_EOL;
    posix_kill(posix_getpid(), SIGUSR1);
}

In CLI run command kill -s 15 PID

[akotulu]

Oh, sorry about the \t. Forgot to remove them.