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[tor-bugs] #15593 [Pluggable transport]: Bring sanity to the tor side of the PT shutdown process.
#15593: Bring sanity to the tor side of the PT shutdown process.
---------------------------------+------------------------------------
Reporter: yawning | Owner: asn
Type: enhancement | Status: new
Priority: normal | Milestone: Tor: 0.2.7.x-final
Component: Pluggable transport | Version:
Keywords: pt-wants | Actual Points:
Parent ID: | Points:
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This is the final phase of my great PT shutdown process cleanup as a
follow up to #15545.
Now that there's a portable mechanism to signal termination to PTs (close
the stdin), we should change the PT shutdown process to allow graceful
termination to look like this:
1. Close stdin (and on U*IX, send a SIGTERM, PT behavior here is
equivalent).
2. Wait for a grace period (~1 sec?)
3. If the child still is not dead, send a SIGKILL/TerminateProcess().
(Failsafe)
This fixes #9330 in that, PTs that wish to trap a graceful shutdown on
Windows have a way to do so, despite the final stage of the process
killing the PT in the most violent way possible as a failsafe
(realistically, PTs should exit shortly after step 1).
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15593>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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