[tor-bugs] #2191 [Tor Client]: Send all error-level log messages to controllers

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#2191: Send all error-level log messages to controllers
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 Reporter:  rransom             |        Type:  defect    
   Status:  new                 |    Priority:  major     
Milestone:  Tor: 0.2.2.x-final  |   Component:  Tor Client
  Version:                      |    Keywords:            
   Parent:                      |  
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Comment(by rransom):

 Replying to [comment:1 nickm]:
 > We should consider some kind of fast-path for sending error logs to
 controllers: we could bypass the whole buffered network IO layer and just
 call send() on the log message.

 Sending the pattern CRLF "." CRLF "421 " Message CRLF on the control
 connection, then closing the connection, would unambiguously deliver a
 message to the controller, but is likely to confuse and/or crash existing
 controllers before they even read the message.  I think that's the least
 bad option for reporting a fatal error at the moment, but it'll need to be
 explicitly requested with USEFEATURE.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2191#comment:2>
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