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Problem Report 0374 Details

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Report 0374 Actions

    Problem Report Number 0374
    Submitter's Classification Minor System Fault
    State Resolved
    Resolution Minor System Fault (MSF)
    Problem Resolution ID MSF.X.0015
    Raised 1994-12-01 08:00
    Updated 2003-03-13 08:00
    Published 1994-12-08 08:00
    Expiry Date 1994-12-07
    Product Standard Internationalised System Calls and Libraries (XPG4)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.3.2
    Test Identification POSIX.os/ioprim/write 2
    Linked Problem Reports MSF4.013, (in, old, system)
    Problem Summary MSF4.015 This problem is investigated and fixed in the next release.
    Problem Text
    This problem is investigated and fixed in the next release.
    Test Output
    ************************************************************************
    /tset/POSIX.os/ioprim/write/T.write 2 Failed

    Test Description:
    When nbytes is equal to zero then the file pointer is not moved, zero
    is returned and the st_atime, st_ctime and st_mtime fields are not
    updated. This happens whether the file is created using creat() or
    open() with O_APPEND set.
    Posix Ref: Component WRITE Assertion 6.4.2.2-05(A)

    Test Strategy:
    CREATE new file using creat()
    SAVE timestamps using fsavtimes()
    VERIFY write(fd, buf, 0) returns zero
    VERIFY that the timestamps have not been updated using fchktimes()
    VERIFY lseek(fd, 0, SEEK_END) returns zero
    CLOSE file descriptor using close()
    OPEN file using open() with O_APPEND set
    WRITE some data to file
    REWIND file using lseek(fd, 0, SEEK_SET)
    SAVE timestamps using fsavtimes()
    VERIFY write(fd, buf, 0) returns zero
    VERIFY that the timestamps have not been updated using fchktimes()
    VERIFY lseek(fd, 0, SEEK_CUR) returns zero
    CLOSE file descriptor using close()
    UNLINK file

    Test Information:
    write(fd, buf, 0) with O_APPEND set moved the file pointer from 0 to 26
    ************************************************************************

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    This is known problem in a number of releases which has resulted from a
    negative interpretation request by the IEEE. It is recommended that a
    temporary waiver is granted since this behaviour has been exhibited by
    various systems for a lengthy period of time without adversely affecting
    application portability.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Minor System Fault (MSF)
    Review Conclusion
    A Temporary Waiver is granted.

    Problem Reporting System Options:

     

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