[tor-bugs] #4952 [Tor Bridge]: managed proxies: "[notice] Failed to terminate process with PID '%d'" when doing Ctrl-c from terminal

["Tor Bug Tracker & Wiki" <torproject-admin@xxxxxxxxxxxxxx>]

#4952: managed proxies: "[notice] Failed to terminate process with PID '%d'" when
doing Ctrl-c from terminal
------------------------+---------------------------------------------------
 Reporter:  asn         |          Owner:                  
     Type:  defect      |         Status:  new             
 Priority:  minor       |      Milestone:  Tor: unspecified
Component:  Tor Bridge  |        Version:                  
 Keywords:              |         Parent:                  
   Points:              |   Actualpoints:                  
------------------------+---------------------------------------------------
 I noticed the following in my logs:
 {{{
 "[notice] Failed to terminate process with PID '%d'"
 }}}
 while I was testing managed proxies.

 This happened because I terminate tor by doing Ctrl-c in a terminal, which
 sends a SIGINT to the whole process group (including obfpsroxy). This
 kills obfsproxy. Then, when I kill tor with a second Ctrl-c, tor tries to
 terminate all the managed proxies which are already dead. This prints the
 above line.

 Maybe this is not even a bug, but I think it could be a good idea to tone
 down the log severity to info, when errno is `ESRCH`.

 In any case, we should print the errno string along with the error
 message.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4952>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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