From: Yaser Sulaiman <yaserbuntu@...>
Date: 2010-07-21T00:33:27+09:00
Subject: Re: Adding to the Errno module

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Hi Matt.

I think you need to define Errno::EFTYPE::Errno and assign it an integer.

module Errno
  class EFTYPE < SystemCallError
    Errno = 42
  end
end

Now in IRB, you'll get something like the following:

irb(main):014:0> raise Errno::EFTYPE, "trying to raise an error here"
Errno::EILSEQ: Illegal byte sequence - trying to raise an error here
from (irb):14

Notice that 42 is the "integer operating system error number corresponding
to" [1] Errno::EILSEQ. You may want to select a different (the
appropriate?) value.

HTH,
Yaser

[1]: http://ruby-doc.org/docs/ProgrammingRuby/html/ref_m_errno.html

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