How do you check if the child process is alive in perl?

Answer 1

In Perl, you can check if a child process is alive by using the kill function with a signal of 0. This does not actually send a signal but checks if the process with the specified PID exists. If the process is alive, kill will return a true value; otherwise, it will return false. Here's a simple example:

my $pid = fork();
if ($pid) {
    # Parent process
    if (kill 0, $pid) {
        print "Child process is alive.\n";
    } else {
        print "Child process is not alive.\n";
    }
}