How do I fork a new process and get back its PID in Perl?

Question

My issue is related to using fork() within Perl code. I wish to fork a new process and capture its PID and return it back to the callee program. Is there some command in Perl which would make this possible?

Answer 1

yes, fork

Quoting from that page:

It returns the child pid to the parent process, 0 to the child process, or undef if the fork is unsuccessful.

Answer 2

Well, Perl's fork function returns PID of child to parent and 0 to child, isn't that what you want?

Answer 3

fork returns child pid to the parent and 0 to the child.

Answer 4

my $pid = fork();
if ($pid == 0)
{
    # We are the child.
}
elsif defined($pid)
{
    # We are the parent of child with PID=pid
}
else
{
    # The fork failed
}