[tor-bugs] #31968 [Applications/Tor Browser]: Use sudo if /proc/cpuinfo isn't readable in the start-tor-browser script

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#31968: Use sudo if /proc/cpuinfo isn't readable in the start-tor-browser script
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 Reporter:  cypherpunks  |          Owner:  tbb-team
     Type:  enhancement  |         Status:  new
 Priority:  Medium       |      Component:  Applications/Tor Browser
  Version:               |       Severity:  Normal
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
 Reviewer:               |        Sponsor:
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 On Linux, the start-tor-browser script checks for SSE2 support by grepping
 /proc/cpuinfo. On some systems, /proc/cpuinfo isn't readable to ordinary
 users (Whonix may implement this) so it will fail with an error saying
 "Tor Browser requires a CPU with SSE2 support.".

 It would be better if the script checked if the file is not readable and
 if it isn't, it tries to grep it with `sudo --noninteractive` so  people
 can add sudoers exceptions for the Tor Browser.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31968>
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