[Bug 12476] New: fuser does not check for unix sockets

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=12476

            Bug ID: 12476
           Summary: fuser does not check for unix sockets
           Product: Busybox
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned at busybox.net
          Reporter: bhcopnmeha at big6w.anonbox.net
                CC: busybox-cvs at busybox.net
  Target Milestone: ---

Contrary to fuser from psmisc <http://psmisc.sourceforge.net/> busybox fuser
does not check for processes using Unix domain sockets on the file system
specified by file when using the '-m' option.

I noticed this on Alpine Linux where my OpenRC init system, which uses 'fuser
-m', would always output the following during shutdown:

  Unmounting /home ...
    in use but fuser finds nothing

As it turns out my 'gpg-agent' still uses my /home directory as it creates Unix
domain sockets in 'GNUPGHOME'. Unfortunately, 'busybox fuser -m' does not find
the gpg-agent process as it only uses Unix domain sockets in '/home'.ü

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