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EBITS is for error filehandles. The select builtin is a thin layer over the underlying select(2) system call so familiarity with that can help (see your OS' manual pages or a tome like e.g. Stevens, Advanced Programming in the UNIX Environment). Unless you've got a burning desire to program that close to the metal as it were you may be better served using IO::Select (or stepping even further back and using an event loop like Mojo::IOLoop, AnyEvent, or POE). Edit: And I just bothered to pull my copy off the shelf and skim and I'm a bit vague still. That's filehandles which you want to know if/when they have errors or exception conditions present.
The cake is a lie. In reply to Re: select RBITS,WBITS,EBITS,TIMEOUT. The meaning of all the *BITS
by Fletch
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