[Bug 66571] New: epoll_wait has it wrong about timeout and EINTR

[Bug 66571] New: epoll_wait has it wrong about timeout and EINTR

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=66571

            Bug ID: 66571
           Summary: epoll_wait has it wrong about timeout and EINTR
           Product: Documentation
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: low
          Priority: P1
         Component: man-pages
          Assignee: documentation_man-pages-ztI5WcYan/vQLgFONoPN62D2FQJk+8+b@public.gmane.org
          Reporter: jonas-p4BucIDcVy3iH4Lt12DN6A@public.gmane.org
        Regression: No

The epoll_wait(2) man page says:

"EINTR  The call was interrupted by a signal handler before either any
        of the requested events occurred or the timeout expired; see
        signal(7)."

Looking at the code of the kernel, EINTR is only returned when there is a
pending signal. If the timeout expires, it will simply return without an error.

Simply removing the "or the timeout expired" part should be enough.

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[Bug 66571] epoll_wait has it wrong about timeout and EINTR

[bugzilla-daemon-590EEB7GvNiWaY/ihj7yzEB+6BGkLq7r]

https://bugzilla.kernel.org/show_bug.cgi?id=66571

Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 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> ---
The problem is that the wording is a little ambiguous. The meaning is this:

EINTR  The call was interrupted by a signal handler before either (1) any
       of the requested events occurred or (2) the timeout expired; see
       signal(7).

I've updated the page to have the text as shown above.

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