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  • Committer: Teddy Hogeborn
  • Date: 2019-07-30 17:03:57 UTC
  • Revision ID: teddy@recompile.se-20190730170357-jte0piul5mq7j5pr
Server: Reap zombies created by multiprocessing.Process()

When creating checkers as multiprocessing.Process() objects, the
multiprocessing module also creates a parent process (for the
call_pipe() function) to call the actual checker process, but this
parent process is not reaped.  This is not a huge problem, since the
zombie is always reaped automatically the next time the multiprocess
starts a new process, but the zombies can be up to as many as there
have ever been simultaneous checker processes.  To fix this, the
process object must be join():ed when they report completion of the
child checker process.

* mandos (Client): Fix doc string to correctly state that
                   Client.checker is a multiprocess.Process() and not
                   a subprocess.Popen() object.
  (Client.checker_callback): After the returncode of the checker
                             process has been read, wait for the
                             self.checker Process object to finish by
                             calling join() on it.

Reported-by: Peter Palfrader <weasel@debian.org>

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   | Name                    | Type | Access     | clients.conf        |
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   |-------------------------+------+------------+---------------------|
 
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   | ApprovedByDefault       | b    | Read/Write | approved_by_default |
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   | ApprovalDelay (a)       | t    | Read/Write | approval_delay      |
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   | ApprovalDuration (a)    | t    | Read/Write | approval_duration   |
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   | ApprovalPending (b)     | b    | Read       | N/A                 |
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   | ApprovedByDefault       | b    | Read/Write | approved_by_default |
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   | Checker                 | s    | Read/Write | checker             |
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   | CheckerRunning (c)      | b    | Read/Write | N/A                 |
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   | Created (d)             | s    | Read       | N/A                 |
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   | Expires (f)             | s    | Read       | N/A                 |
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   | ExtendedTimeout (a)     | t    | Read/Write | extended_timeout    |
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   | Fingerprint             | s    | Read       | fingerprint         |
 
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   | KeyID                   | s    | Read       | key_id              |
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   | Host                    | s    | Read/Write | host                |
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   | Interval (a)            | t    | Read/Write | interval            |
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   | KeyID                   | s    | Read       | key_id              |
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   | LastApprovalRequest (g) | s    | Read       | N/A                 |
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   | LastCheckedOK (h)       | s    | Read/Write | N/A                 |
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   | LastCheckerStatus (i)   | n    | Read       | N/A                 |