root/pcntl/test-pcntl.php

DEFINITIONS

1. alarm_handle
2. usr1_handle

#!../../php -q
<?

declare(ticks=1);

function alarm_handle($signal){
         if ($signal==SIGALRM) print "Child: Caught SIGALRM!!!\n";
}

function usr1_handle($signal){
        if ($signal==SIGUSR1) print "Child: Caught SIGUSR1!!!\n";
}

print "This test will demonstrate a fork followed by ipc via signals.\n";

$pid=pcntl_fork();
if ($pid==0) {
        pcntl_signal(SIGUSR1, "usr1_handle");
        pcntl_signal(SIGALRM, "alarm_handle");
        print "Child: Waiting for alarm.....\n";
        sleep(100);
        print "Child: Waiting for usr1......\n";
        sleep(100);
        print "Child: Resetting Alarm handler to Ignore....\n";
        pcntl_signal(SIGALRM, SIG_IGN);
        print "Child: sleeping for 10 seconds....\n";
        sleep(10);
        print "Done\n";
} else {
        print "Parent: Waiting 10 seconds....\n";
        sleep(10);
        print "Parent: Sending SIGALRM to Child\n";
        posix_kill($pid,SIGALRM);
        sleep(1);
        print "Parent: Senging SIGUSR1 to Child\n";
        posix_kill($pid,SIGUSR1);
        sleep(2);
        print "Parent: Sending SIGALRM to Child\n";
        pcntl_waitpid($pid, &$status, $options);
}