[Bug 134971] Clarify kill(2) man-page for permission to "send" signal 0

https://bugzilla.kernel.org/show_bug.cgi?id=134971

--- Comment #2 from John Wiersba <jrw32982-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> ---

Thanks, Michael!  That does make it clearer!



      From: "bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r@public.gmane.org"
[off-list ref]
 To: jrw32982-/E1597aS9LQAvxtiuMwx3w@public.gmane.org 
 Sent: Saturday, July 16, 2016 6:24 AM
 Subject: [Bug 134971] Clarify kill(2) man-page for permission to "send" signal
0

https://bugzilla.kernel.org/show_bug.cgi?id=134971

Michael Kerrisk [off-list ref] changed:

          What    |Removed                    |Added
----------------------------------------------------------------------------
            Status|NEW                        |RESOLVED
                CC|                            |mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        Resolution|---                        |CODE_FIX

--- Comment #1 from Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---

Hello John,

I agree the page could be clearer. What I did was change the paragraph
describing sig==0 to:

      If sig is 0, then no signal is sent, but existence and  permission
      checks  are  still  performed;  this  can be used to check for the
      existence of a process ID or process group ID that the  caller  is
      permitted to signal.

I believe that makes the point clear, so I'll close this for now. Please reopen
if you think there's still a problem.

Thanks,

Michael

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