[MacPorts] #30437: More accurate post-activate logic for fuse4x

[MacPorts]

#30437: More accurate post-activate logic for fuse4x
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 Reporter:  anatol.pomozov@…          |       Owner:  macports-tickets@…                   
     Type:  request                   |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  2.0.0                                
 Keywords:                            |        Port:  fuse4x-kext                          
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 post-activate logic for fuse4x-kext should be following:

  - (Optional step) Check if kext is running: "kextstat -lb
 org.fuse4x.kext.fuse4x". if it is not running - we are done.
  - unload the kext using "sudo kextunload -b org.fuse4x.kext.fuse4x". In
 case if nobody uses kext this operation should be successful.
  - check if the kext is still running. if it is not running - we are done.
  - if previous step shown that the kext is still running - it means that
 somebody still uses it. We need to ask user either to stop all filesystems
 and unload kext manually or restart the computer. The list of mounted
 fuse4x filesystems can be found via "mount -t fuse4x"

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Ticket URL: <https://trac.macports.org/ticket/30437>
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