From: Tanaka Akira <akr@...17n.org>
Date: 2005-04-15T19:04:01+09:00
Subject: Re: EINTR Error Causing Failure in E-mail Sending Script

In article <425E7EA3.9080801@bengribaudo.com>,
  Ben Gribaudo <rubytalk@bengribaudo.com> writes:

> The impression I received from the ruby-talk archives on how to resolve
> this issue is to catch the Errno::EINTR exception and retry the block
> until the the code succeeds. Like:
>     def mail(message)
>         begin
>             Net::SMTP.start("localhost", 25) do |smtp|
>                 smtp.sendmail(message.to_s, message.from.address,
> message.to.address)
>             end           
>         rescue Errno::EINTR
>             retry
>         end   
>     end
>
> Does this sound like a wise* and re*asonable solution? Can any of you
> shed more light as to why we encounter the EINTR error? Is it a
> threading/signal handling issue in Ruby or something we are doing in our
> application or ... ?

I'm not sure why EINTR.

However I think it's better to restart sysread itself instead of 
Net::SMTP.start.

readpartial can be used instead since 1.8.3.  readpartial doesn't
raise EINTR.
-- 
Tanaka Akira