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Problem Report 0765 Details

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This page provides all information on Problem Report 0765.

Report 0765 Actions

    Problem Report Number 0765
    Submitter's Classification Specification problem
    State Resolved
    Resolution Temporary Interpretation (TIN)
    Problem Resolution ID TIN.X.0056
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1995-08-24 08:00
    Product Standard Commands and Utilities V2 (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSC version 4.1.4
    Test Identification POSIX.cmd/awk 243
    Specification Commands and Utilities Issue 4 Version 2
    Location in Spec See Problem Text
    Problem Summary TIN4C.00005 Test may fail on implementations which implement historical (POSIX 1003.2b) field splitting semantics.
    Problem Text
    This test may fail on implementations that implement hstorical
    (current POSIX.2b draft) field splitting behavior.

    awk test purpose 243 implements field splitting based on the
    current spec, which states

    Execution of the awk program starts by first executing the
    actions associated with all BEGIN patterns in the order they
    occur in the program. Then each file operand (or standard input
    if no files were specified) will be processed in turn by reading
    data from the file until a record separator is seen (a newline
    character by default), ...

    splitting the current record into fields using the current value
    of FS according to the rules in Regular Expressions on page 172,

    ...evaluating each pattern...

    This implies that any change in FS will be used to split the
    next record read following the assignment, not the current record.

    This was also the original POSIX wording, but the 1003.2b draft
    changed this read

    "When the first reference to a field in the record is evaluated, the
    record is split into fields using the current value of FS ..."

    This restores awk field splitting back to historical practice,

    The test depends on the XPG specified behavior and will fail
    on IUTs which implement historical practice.

    We believe the test should allow either behavior in anticipation
    of 1003.2b being approved, the 2003.2 being realigned with it,
    and the tests needing aligned with 2003.2.
    Test Output
    520|1 1 25925 1 1|Assertion #243 (A):
    520|1 1 25925 1 1|Standard output not same as expected standard output.
    520|1 1 25925 1 2|diff of "awk_eso_243" and "awk_out_243":
    520|1 1 25925 1 3|*** awk_eso_243 Mon Aug 7 09:51:19 1995
    520|1 1 25925 1 4|--- awk_out_243 Mon Aug 7 09:51:20 1995
    520|1 1 25925 1 5|***************
    520|1 1 25925 1 6|*** 1,10 ****
    520|1 1 25925 1 7| FS = field 1 = Russia
    520|1 1 25925 1 8| FS = field 1 = Canada
    520|1 1 25925 1 9| FS = field 1 = China
    520|1 1 25925 1 10|! FS = [[:digit:]]{2} field 1 = USA
    520|1 1 25925 1 11| FS = [[:digit:]]{2} field 1 = Brazil
    520|1 1 25925 1 12| FS = [[:digit:]]{2} field 1 = Australia
    520|1 1 25925 1 13| FS = [[:digit:]]{2} field 1 = India
    520|1 1 25925 1 14|! FS = a field 1 = Argentina
    520|1 1 25925 1 15| FS = a field 1 = Sud
    520|1 1 25925 1 16| FS = a field 1 = Algeri
    520|1 1 25925 1 17|--- 1,10 ----
    520|1 1 25925 1 18| FS = field 1 = Russia
    520|1 1 25925 1 19| FS = field 1 = Canada
    520|1 1 25925 1 20| FS = field 1 = China
    520|1 1 25925 1 21|! FS = [[:digit:]]{2} field 1 = USA
    520|1 1 25925 1 22| FS = [[:digit:]]{2} field 1 = Brazil
    520|1 1 25925 1 23| FS = [[:digit:]]{2} field 1 = Australia
    520|1 1 25925 1 24| FS = [[:digit:]]{2} field 1 = India
    520|1 1 25925 1 25|! FS = a field 1 = Argentin
    520|1 1 25925 1 26| FS = a field 1 = Sud
    520|1 1 25925 1 27| FS = a field 1 = Algeri
    220|1 1 1 09:51:27|FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    Anticipating future alignment of the POSIX 2003.2 method(s)
    which the test(s) listed are based on with POSIX 1003.2b,
    a temporary interpretation is recommended.

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

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