[SCM] Hurd branch, master, updated. v0.9.git20220818-5-g772e292c

[Samuel Thibault]

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- Log -----------------------------------------------------------------
commit 772e292c2d47e9d93455e3c87ae0209a58a3da67
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Tue Aug 23 04:25:54 2022 +0200

    Fix spurious EINTR while exec() within fakeroot
    
    The scenario is:
    
    - process running inside fakeroot exec()s
    - fakeroot forwards the exec call
    - exec starts thrashing the previous process, and notably close its
      ports
    - the send port that pointed to fakeroot is thus closed
    - fakeroot thus receives a no-senders notification
    - its libports thus interrupts the current RPC on it, i.e. the exec(),
      because it thinks that the caller is no more, but that was exactly the
      point of the exec()...
    - exec tries to interrupt its own RPCs, at best the execution will fail,
      at worse the process is already thrashed and there's nothing better
      than burying it for good.
    
    The symptom is processes running inside fakeroot seeming randomly
    crashing with SIGKILL.
    
    Making fakeroot keep a send right avoids the no-senders notification,
    thus the whole interruption (which was meaningless).

-----------------------------------------------------------------------

Summary of changes:
 trans/fakeroot.c | 8 ++++++++
 1 file changed, 8 insertions(+)


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