From: ts <decoux@...>
Date: 2001-01-21T18:53:39+09:00
Subject: [ruby-talk:9641] Re: Non-blocking I/O?

>>>>> "M" == Michael Schuerig <schuerig@acm.org> writes:

M> Sounds good, but poses another problem: How to find out the number of
M> available bytes? If I call sysread with a number exceeding the number of
M> available bytes, it runs into EOF an throws an exception. Unix read(2)
M> behaves differently, it only reads at most the number of bytes specified
M> and returns the actual number read.

 #sysread use internally read(2). Just catch IO::EOFError

	    begin
	       s = f.sysread(4);
	       puts "-> Reading"
	       puts s
	    rescue IO::EOFError
	       puts "-> Sleeping"
	       sleep(5)
	    end

M> Yes, thanks. I tried to find that thread, but without success. I
M> wouldn't be able to read it in japanese anyway...

 You have a translator, see

  http://www.ruby-lang.org/en/ml.html#japanlist


Guy Decoux