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How do I open a file without blocking?

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How do I open a file without blocking?

You need to use the O_NDELAY or O_NONBLOCK flag from the Fcntl module in conjunction with sysopen():

    use Fcntl;
    sysopen(FH, "/tmp/somefile", O_WRONLY|O_NDELAY|O_CREAT, 0644)
    or die "can't open /tmp/somefile: $!":


Source: Perl FAQ: Files and Formats
Copyright: Copyright (c) 1997 Tom Christiansen and Nathan Torkington.
Next: How do I create a file only if it doesn't exist?

Previous: How can I tell if there's a character waiting on a filehandle?



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