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

The Open Brand -- Problem Reporting and Interpretations System

Problem Report 1628 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 1628.

Report 1628 Actions

    Problem Report Number 1628
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Permanent Interpretation (PIN)
    Problem Resolution ID PIN.X.0185
    Raised 1998-02-17 08:00
    Updated 2003-03-13 08:00
    Published 1998-03-20 08:00
    Product Standard Internationalised System Calls and Libraries Extended V2 (UNIX 98)
    Certification Program The Open Brand certification program
    Test Suite VSU version 5.0.2
    Test Identification CAPI.hdr/misc/netdb 18
    Specification System Interfaces and Headers Issue 5
    Location in Spec See Problem Text
    Problem Summary PIN4U.00051 This IR claims that macro definition is allowable in lieu of a declaration.
    Problem Text

    The XPG5 XNS spec states the following in the netdb.h section on
    page 211:

    "<netdb.h> header provides a declaration a declaration of h_errno
    as a modififiable l-value of type int. For example:

    extern int h_errno; "

    The testcase is being too strict in it's interpretation of the
    requirements of the spec.

    Our implementation defines in netdb.h, the following code:

    extern void *h_errno_which(void);
    #define h_errno (*(int *)h_errno_which())

    This defines h_errno to be a dereferenced int pointer, which is both
    a modifiable l-value and type int. To verify this, review the
    following test program:

    #include <netdb.h>
    int
    main()
    {
    h_errno = 5;
    h_errno = 7;
    }

    This compiles and runs without error, indicating that "h_errno"
    is modifiable and an l-value. The compilation line is:

    c89 -D_XOPEN_SOURCE=500 herrnotest.c -o herrnotest

    The last sentence of the "DESCRIPTION" section above explicitly
    allows this, and in our opinion shows the expectation of such a
    definition.

    Test Output
    TEST CASE: netdb.h

    TEST PURPOSE #18
    The variable h_errno shall be declared in netdb.h.
    ERROR: h_errno not defined
    18 FAIL

    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.

    The text of the standard specifies a declaration of h_errno, and not a
    macro definition. Although this may be consistent with the intent of
    the spec, it is not consistent with the text. Since the spec
    specifies a declaration we believe the test is correct in requiring a
    variable be declared. A macro definition does not fulfill that
    requirement.

    If the standard is believe to be too strict, then a change in the spec
    is needed to properly reflect the actual intent. To allow this
    behavior the spec must be changed to allow a macro definition, and a
    PIN should be applied for with the associated review.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution No Resolution Given
    Review Conclusion
    This request should go for a 14 day review.

    Review Type Expert Group Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution No Resolution Given
    Review Conclusion
    It was always intended that the specification of h_errno in XNS5 should
    allow it to be defined as a macro. The use of the word "declaration"
    rather than "definition" appears to introduce some confusion, but it is
    nevertheless reasonably clear that a macro definition is allowable. The
    request should be granted.

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

    Problem Reporting System Options:

     

    Back   

Contact the Certification Authority