Home • About Us • A-Z Index • Search * Contact Us • Register • Login • Press • Shop

The Open Brand -- Problem Reporting and Interpretations System

Problem Report 0195 Details

Help Show help | Quick Search | Submit a Test Suite Support Request | Click here to view your privileges

This page provides all information on Problem Report 0195.

Report 0195 Actions

    Problem Report Number 0195
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Test Suite Deficiency (TSD)
    Problem Resolution ID TSD.X.0195
    Raised 1994-10-17 08:00
    Updated 2003-03-13 08:00
    Published 1994-10-27 08:00
    Product Standard Internationalised System Calls and Libraries (XPG4)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.3.4
    Test Identification ANSI.os/streamio/fflush 8 (and others listed below)
    Problem Summary TSD4.195 The VSX suite is expecting fflush() to set the error indicator but according the the XPG4 standard it is not required to do so. Page 112 of CAE Specification System Interfaces and Headers, Issue 4, un...
    Problem Text

    The VSX suite is expecting fflush() to set the error indicator but
    according the the XPG4 standard it is not required to do so.
    Page 112 of CAE Specification System Interfaces and Headers, Issue 4,
    under section RETURN VALUE, states:

    "Upon successful completion, the fflush() function returns 0.
    Otherwise, it returns EOF and sets errno to indicate the error."

    Nowhere in the section for fflush() is there any mention that the
    error indicator must be set. The ANSI C standard, also, does not
    require that fflush() set the error indicator.

    This problem also exists in the following test cases:

    /tset/ANSI.os/streamio/fflush/T.fflush 5 Failed
    /tset/ANSI.os/streamio/fflush/T.fflush 6 Failed
    /tset/ANSI.os/streamio/fflush/T.fflush 7 Failed
    /tset/ANSI.os/streamio/fflush/T.fflush 8 Failed
    /tset/ANSI.os/streamio/fflush/T.fflush 9 Unresolved
    /tset/ANSI.os/streamio/fflush/T.fflush 10 Failed
    /tset/ANSI.os/streamio/fflush/T.fflush 11 Failed

    Note: test #9 is included in this list but is "Unresolved" because
    we haven't set VSX_ULIMIT_BLKS yet. If we were to set
    VSX_ULIMIT_BLKS, we believe the error would exist in test 9 as well
    since tests 5 through 11 all share the same code.
    Test Output
    /tset/ANSI.os/streamio/fflush/T.fflush 5 Failed

    Test Description:
    For the XNFS specification:
    Not in use.
    For the XSH specification:
    EAGAIN in errno and a return value of EOF when fflush() is called
    and the underlying file descriptor references a pipe with the
    O_NONBLOCK flag set and there is insufficient capacity in the pipe
    to accept the data.
    Posix Ref: Component FFLUSH Assertion 8.2.3.11-07(C)

    Test Strategy:
    CREATE a write on a pipe with O_NONBLOCK set using do_ferr() -
    (tsetlib)
    VERIFY that EOF has been returned and that errno has been set to
    EAGAIN

    Test Information:
    fflush() failed to set error indicator when testing for errno
    112(EAGAIN)

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    All of the other stream related functions which produce errors set the
    stream indicator, but fflush() is not specified as producing this behaviour.
    This is slightly strange and may be caused by a problem in the XPG specification
    or have been a conscious decision of the working group.

    It is accepted that this is a test suite deficiency and it is recommended
    that a waiver is granted.

    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:

     

    Back   

Contact the Certification Authority