Parameter 'stdout' is not working

[bessarabov]

I've installed ubic from ppa to ubuntu 12.04.

Then I've created file /etc/ubic/service/tmp:

    use Ubic::Service::SimpleDaemon;

    my $service = Ubic::Service::SimpleDaemon->new(

        bin => qq/perl -e 'while (1) { print time . "\n"; sleep 1; }'/,

        stdout => "/tmp/tmp-out.log",

        stderr => "/tmp/tmp-err.log",

        ubic_log => "/tmp/tmp-ubic.log",

    );

Afther I ran `sudo ubic start tmp` the file '/tmp/tmp-out.log' is created, but I has no content.

If I change the bin command to:

    bin => qq/perl -e 'while (1) { warn time . "\n"; sleep 1; }'/,

And restart service, then I get what I expect in the file "/tmp/tmp-err.log".

Can you please help me with this behaviour.

[Vyacheslav Matyukhin]

That's because of buffering policies in perl: stderr is never buffered, stdout is buffered only if the output is not a terminal.

perl -e 'STDOUT->autoflush(1); ...' should fix this issue. (With additional 'use IO::Handle' if you care about compatibility with older perl versions.)

 

19.03.2014, 09:55, "bessarabov" <ivanbes...@gmail.com>:

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[Иван Бессарабов]

Thank you for your explanation!