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Problem Report 1256 Details

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Report 1256 Actions

    Problem Report Number 1256
    Submitter's Classification Specification problem
    State Resolved
    Resolution Rejected (REJ)
    Problem Resolution ID REJ.X.0458
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published null
    Product Standard Internationalised System Calls and Libraries Extended (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSU version 4.1.0
    Test Identification Base/signals 4
    Problem Summary PG4U.00007 We object to the default action for the SIGPOLL signal being a termination of the process.
    Problem Text
    We object to the default action for the SIGPOLL signal being a
    termination of the process. While we acknowledge that this action is
    correct according to the SVID it is not correct for all of the BSD
    based systems. Under BSD the SIGPOLL signal is mapped to be the same
    as SIGIO; defined as input/output possible or completed. As the
    intention of the two signals is identical in all respects except as to
    the default handling we request that the specification be modified to
    define the default condition as undefined. As developers would
    instantiate signal handlers so as to get precisely the desired
    behavior, this change would not cause any hardships.
    Test Output
    TEST CASE: signals

    TEST PURPOSE #4
    The default action for the signal SIGPOLL, shall be
    process termination with all the consequences of
    _exit() except that the status made available shall
    indicate abnormal termination by that signal.
    TEST: wait notified of termination
    TEST: Status indicates abnormal termination with signal
    PREP: Set SIGPOLL exception handler to SIG_DFL
    TEST: SIGPOLL exits
    ERROR: SIGPOLL exception did not exit
    4 FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    This request isn't really a grey area in the spec; it clearly
    mandates that the default action for SIGPOLL is abnormal
    termination of of the process.

    We believe the submitter is correct in stating that developers
    using functionality relying on SIGPOLL would create their own
    signal handlers to get precsely the desired behavior. There
    would be little historical or future hardship if this change were
    accepted.

    But the converse of this argument is also true. Leaving the spec
    unchanged will create little historical or future hardship. This
    plus the significant step of adding a new class of default
    actions to the signal spec, plus noting that accepting this
    request would distance the XSH spec from the SVID leads us to
    believe the default action for SIGPOLL should remain unchanged.

    We recommend this request be refused.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Rejected (REJ)
    Review Conclusion
    This request is refused. If wished a Temporary. Waiver may be
    applied for on the grounds of a minor fault on the system being tested.

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