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Problem Report 1593 Details

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Report 1593 Actions

    Problem Report Number 1593
    Submitter's Classification Specification problem
    State Resolved
    Resolution Permanent Interpretation (PIN)
    Problem Resolution ID PIN.X.0150
    Raised 1995-12-10 08:00
    Updated 2003-03-13 08:00
    Published 1995-12-20 08:00
    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 CAPI.hdr/misc/poll 4
    Specification System Interfaces and Libraries Issue 4 Version 2
    Location in Spec See Problem Text
    Problem Summary PIN4U.00016 This test may fail on all implementations. BR 1170/138 ruled the part of the XSH specification this test is verifying is in error.
    Problem Text
    This test may fail on all implementations. BR 1170/138 ruled the
    part of the XSH specification this test is verifying is in error.

    The X/Open Base Working Group Resolution 1170/138 declares this
    part of the XSH4 V2 specification to be in error. The resolution
    is attached.

    Resolution text:

    We have a resolution request about a VSU failure which looking at
    the specification seems to be caused by a specification problem.
    For poll.h header test:

    TEST PURPOSE #4
    The symbolic constant POLLIN shall be defined in
    poll.h and have the same value as POLLRDNORM or-ed with POLLRDBAND.
    ERROR: Expected POLLIN = 0xc0 (0x40 OR 0x80), value is 0x1.
    4 FAIL

    This is specified in the XSH4.2 specification but we feel that this
    will break many (if not all) implementations. On all implemntations
    we have checked we have seen the following definition:

    #define POLLIN 0x0001 /* fd is readable */
    #define POLLRDNORM 0x0040 /* normal data is readable */
    #define POLLRDBAND 0x0080 /* priority band data is readable */

    We think the specification is confusing "value" with "effect". POLLIN
    should indeed have the same effect as (POLLRDNORM|POLLRDBAND). It
    would be nice to have it being the same value, but that would break
    historical implementations since POLLIN has always been 0x0001.

    [Request text ends]

    [Resolution response]

    This is a defect.

    POLLIN should have the same effect as (POLLRDNORM | POLLRDBAND),
    not the same value. P1003.1g specifies that all the values
    are bitwise distinct.

    The description on poll.h for POLLIN
    should be updated to say "the same effect as" and not "the same
    value as".
    Test Output
    15|1 1.10 1|TCM Start
    400|1 4 1 06:22:57|IC Start
    200|1 1 06:22:57|TP Start
    520|1 1 19689 1 1|SPEC1170TESTSUITE CASE 4
    520|1 1 19689 1 2|The symbolic constant POLLIN shall be defined in
    520|1 1 19689 1 3|poll.h and have the same value as POLLRDNORM or-ed with POLLRDBAND.
    520|1 1 19689 1 4|ERROR: Expected POLLIN = 0xc0 (0x40 OR 0x80), value is 0x1.
    220|1 1 1 06:22:57|FAIL
    410|1 4 1 06:22:57|IC End
    80|1 0 06:22:57|TC End

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    Based on BR 1170/138 which ruled this issue to be a defect in the
    standard, a permanent interpretation is recommended.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Permanent Interpretation (PIN)
    Review Conclusion
    A Permanent Interpretation is granted.

    Problem Reporting System Options:

     

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