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Problem Report 0822 Details

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Report 0822 Actions

    Problem Report Number 0822
    Submitter's Classification Specification problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0337
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1996-03-19 08:00
    Product Standard Commands and Utilities V2 (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSC version 4.1.5
    Test Identification POSIX.cmd/read 18
    Problem Summary TSD4C.00174 The request claims that trying to assign values to readonly environment variables via the read command is not a mandated error.
    Problem Text
    The request claims that trying to assign values to readonly environment
    variables via the read command is not a mandated error.

    Test purpose read, assertion 18 is testing for non-required XPG4
    behavior. The assertion is testing the effect of using a readonly
    variable in a read statement. The assertion is expecting failure
    in specific manner. However, XPG4 V2 XCU read section, pages 601-603,
    does not mention readonly variables at all. In particular the spec
    does not state that using readonly variables in a read statement is
    an error. Thus the testcase cannot assume that the exit status should
    be >0 or that processing of other variables on the read statement will
    be completed.

    This assertion needs to be removed and an interpretation submitted
    to the 1003.2 working group to remove this grey area.
    Test Output
    ***********************************************************************
    /tset/POSIX.cmd/read/read.ex 1 Failed


    Test Information:
    Assertion #18 (A):
    second variable set to '', expecting '2'

    ***********************************************************************


    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    We recommend this request be refused.

    We believe the test is correct.

    Although the read utility does not specifically refer to readonly
    variables, the default Consequences of Errors states the requirements
    when the requested action cannot be performed on an operand, in this
    case, a readonly variable. The standard states on page 17,

    If the requested action cannot be performed on an operand
    representing a file, directory, user, process, etc., the
    utility will issue a diagnostic message to standard error and
    continue processing the next operand in sequence, but the
    final exit status is returned as non-zero.

    It is clearly not possible to perform a write operation onto a
    readonly variable. As a result, the test correctly expects the
    behavior described above.

    Review Type Expert Group Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution No Resolution Given
    Review Conclusion
    The Base WG response for this item is:

    req.4.C.00330: The specification is correct. However, since the
    "Consequences of Errors" section for read is defined as "Default", and this
    states that any changes to the environment are unspecified, the test suite
    cannot test that the second value is assigned to the second variable. It can
    only test that the assignment to the readonly variable fails in the
    appropriate manner. The confusion arises because read exists solely to
    modify the environment.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Test Suite Deficiency (TSD)
    Review Conclusion
    This is an agreed Test Suite Deficiency.

    Problem Reporting System Options:

     

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