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Problem Report 2570 Details

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Report 2570 Actions

    Problem Report Number 2570
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Minor System Fault (MSF)
    Problem Resolution ID MSF.X.0110
    Raised 2011-11-03 22:51
    Updated 2011-11-04 14:52
    Published 2011-11-04 14:52
    Expiry Date 2012-11-04
    Product Standard Internationalised System Calls and Libraries Extended V3 (UNIX 03)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.7.4
    Test Identification /tset/XOPEN.os/files/dev_tty/T.dev_tty.1
    Specification Base Definitions Issue 6
    Location in Spec N/A.
    Problem Summary /tset/XOPEN.os/files/dev_tty/T.dev_tty 1 fail due to extraneous NULL.
    Problem Text While the test successfully processes (ignores) the SIGINT, in
    termios.c, ptycon(), the SIGINT appears to cause child1 (but not child2)
    to write a NULL into the slave side of the loopback PIPE. This causes
    the subsequent WRITE data to /dev/tty' READ/VERIFY portion of the test
    to fail because the READ string length doesn't match the expected string
    length; it's one greater due to the NULL byte prefixing the test
    string. Examining termios.c, rdwr() and the contents of the
    tty_termios, a 0 length read should always result in a '4' being
    written. The NULL is therefore inexplicable, but it has been confirmed
    that rdwr() wrote it. NOTE: EINTR is an old ernno, from SIGINT.

    At this time, we are requesting a waiver while this issue is investigated.
    Test Output /tset/XOPEN.os/files/dev_tty/T.dev_tty 1 Failed

    Test Description:
    The file /dev/tty is, in each process, a synonym for the controlling
    terminal associated with the process group of that process, if any.

    Test Strategy:
    CREATE child process using cppair()
    INITIALISE the terminal loop-back mechanism using termios_prep()
    SET the signal SIGINT to be caught using sigaction()
    WRITE an interrupt character to the loop terminal
    VERIFY SIGINT is received
    OPEN the file /dev/tty
    WRITE data to /dev/tty
    READ data from loop terminal
    VERIFY correct data was read

    Test Information:
    read() on VSX_TERMIOS_LOOP failed - errno 4 (EINTR)

    Review Information

    Review Type TSMA Review
    Start Date 2011-11-03 22:51
    Last Updated 2011-11-04 09:39
    Completed 2011-11-04 09:39
    Status Complete
    Review Recommendation Minor System Fault (MSF)
    Review Response This failure is caused by a subtle issue relating to pseudo-terminals
    and is not expected to have significant impact on applications.
    Therefore a temporary waiver is recommended.

    Review Type SA Review
    Start Date 2011-11-04 17:39
    Last Updated 2011-11-04 10:31
    Completed 2011-11-04 10:31
    Status Complete
    Review Resolution Minor System Fault (MSF)
    Review Conclusion This issue is not expected to have significant impact on applications.
    Therefore a temporary waiver is granted.

    Problem Reporting System Options:

     

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