[tor-bugs] #9781 [Tor]: Tor with port forwarding shows "Failed to terminate process" messages

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#9781: Tor with port forwarding shows "Failed to terminate process" messages
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     Reporter:           |      Owner:
  mgorbach               |     Status:  needs_review
         Type:  defect   |  Milestone:  Tor: 0.2.5.x-final
     Priority:  normal   |    Version:
    Component:  Tor      |   Keywords:  tor-relay tor-fw-helper 025-triaged
   Resolution:           |  Parent ID:
Actual Points:           |
       Points:           |
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Comment (by nickm):

 Out of those, I most suspect cd05f35d2cdf50.

 Here's a fun mismatch it introduced:
 {{{
 // In the child process:
         nbytes = write(STDOUT_FILENO, error_message,
 error_message_length);

 // In the parent:
     stderr_status = log_from_pipe(child_handle->stderr_handle,
                                   LOG_INFO, filename, &retval);
 }}}

 Note that stdout != stderr.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9781#comment:9>
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