This works: 

$ perl -le'kill TTOU => 0 or die $!; print "done"'

[1]+  Stopped       perl -le'kill TTOU => 0 or die $!; print "done"'

$ fg
perl -le'kill TTOU => 0 or die $!; print "done"'
done

[download]

Check for an error. If there's no error, it's not a problem sending the signal aka not a Perl problem.

In reply to Re: send SIGTTOU to forked process? by ikegami
in thread send SIGTTOU to forked process? by anna

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