[tor-bugs] #13920 [Tor Launcher]: If the ports tor wants to use are already in use, try different ports before freaking out.

[Tor Bug Tracker & Wiki]

#13920: If the ports tor wants to use are already in use, try different ports
before freaking out.
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 Reporter:  StrangeCharm  |          Owner:  brade
     Type:  defect        |         Status:  new
 Priority:  minor         |      Milestone:
Component:  Tor Launcher  |        Version:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
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 A user story:
 Imagine that you want to run two instances of Torbrowser at the same time.
 Perhaps you want to use one site in one instance and another site with the
 other, but who knows? You download the Torbrowser tarball and extract it
 twice — into two different directories. Now you launch one of the
 Torbrowsers. So far so good. You go to launch the other one, and… oh no,
 “Tor unexpectedly exited.”. Now you're sad.

 Tor didn't launch properly because the ports it wants to use are already
 in use by the other Torbrowser's tor. You could fiddle with the config
 files to manually fix this. But it'd be nicer if Tor Launcher figured this
 out on its own. If tor didn't start properly, was it because the ports it
 wanted were already in use? If we just increment them all by one and try
 again, does it work? If so, let's just do that.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13920>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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