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simple-init Bug Fix For Aug 2016

Journal by cafebabe

A problematic bug in simple-init can be resolved by eliminating one variable. Specifically, change:-

$wait=60*60*24;
while($active&& $running) {
  (undef,$wait)=select(undef,undef,undef,$wait);
}

to:-

while($active&& $running) {
  select(undef,undef,undef,60*60*24);
}

or suchlike. This change eliminates the case where the variable is zero and a busy wait on select() ensues.

Minor bugs remain. Regardless, simple-init is now suitable for deployment on systems which do not require suspend.

 

Reply to: Re:Wha?

    (Score: 2) by Knowledge Troll on Friday August 19 2016, @01:45AM

    by Knowledge Troll (5948) on Friday August 19 2016, @01:45AM (#389832) Homepage

    For downward compatibility, the code was intended to run on Perl4.

    Whoa uhm ok.

    It is preferable to keep dependencies down - especially in an init system.

    Time::HiRes is in Core so it is already everywhere perl 5 is. Perl 4 I dunno. It even looks like strict depends on Time::HiRes so I would assume it has already even been loaded. But then Perl 4. *shrug*

    And you should still find an algorithm for sleeping and ensuring the right sleep duration happened then either faulting or gracefully recovering from it.

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