Current Perl documentation can be found at perldoc.perl.org.

Here is our local, out-dated (pre-5.6) version:

You can't. You need to imitate the system() call (see the perlipc manpage for sample code) and then have a signal handler for the INT signal that passes the signal on to the subprocess. Or you can check for it:

    $rc = system($cmd);
    if ($rc & 127) { die "signal death" }