I think it's because you are intermixing sleep and alarm. Some platforms implement alarm using sleep (or something like that - some tidbit of info I picked up somewhere), so mixing those two together is not good. If you replace your sleep 4; line with select(undef,undef,undef,4); or my $foo = <STDIN>;, it will not work -- you get a success with the select() version and the script 'hangs' waiting for input with the STDIN version (on my system anyhow). Just as if the signal was never received.

In reply to Re^2: SIGALRM and Win32 by Anonymous Monk
in thread SIGALRM and Win32 by Anonymous Monk

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