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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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*** Mandos Server
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    + GnuTLS 3.3          https://www.gnutls.org/
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      (but not 3.6.0 or later, until 3.6.6, which works)
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    + Avahi 0.6.16        http://www.avahi.org/
 
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    + Avahi 0.6.16        https://www.avahi.org/
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    + Python 2.7          https://www.python.org/
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    + dbus-python 0.82.4 https://dbus.freedesktop.org/doc/dbus-python/
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    + PyGObject 3.7.1     https://wiki.gnome.org/Projects/PyGObject
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    fping ssh-client
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*** Mandos Client
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    + GNU C Library 2.16 https://gnu.org/software/libc/
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    + initramfs-tools 0.85i
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                        https://tracker.debian.org/pkg/initramfs-tools
 
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    + GNU C Library 2.17 https://gnu.org/software/libc/
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    + GnuTLS 3.3        https://www.gnutls.org/
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      (but not 3.6.0 or later, until 3.6.6 which works)
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    + Avahi 0.6.16      http://www.avahi.org/
 
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    + Avahi 0.6.16      https://www.avahi.org/
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    + GnuPG 1.4.9       https://www.gnupg.org/
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    + GPGME 1.1.6       https://www.gnupg.org/related_software/gpgme/
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    + pkg-config https://www.freedesktop.org/wiki/Software/pkg-config/
 
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    + libnl-route 3     https://www.infradead.org/~tgr/libnl/
 
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    + GLib 2.40         http://www.gtk.org/
 
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    One of:
 
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    + initramfs-tools 0.85i
 
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                        https://tracker.debian.org/pkg/initramfs-tools
 
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    + dracut 044+241
 
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         http://www.kernel.org/pub/linux/utils/boot/dracut/dracut.html
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    Strongly recommended:
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    + OpenSSH           http://www.openssh.com/
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    Package names:
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    initramfs-tools libgnutls-dev gnutls-bin libavahi-core-dev gnupg
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    libgpgme11-dev pkg-config ssh
 
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    initramfs-tools dracut libgnutls-dev gnutls-bin libavahi-core-dev
 
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    gnupg libgpgme11-dev pkg-config ssh libnl-route-3-dev
 
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    libglib2.0-dev
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* Installing the Mandos server
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