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Problem Report 0343 Details

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Report 0343 Actions

    Problem Report Number 0343
    Submitter's Classification Specification problem
    State Resolved
    Resolution Permanent Interpretation (PIN)
    Problem Resolution ID PIN.X.0059
    Raised 1997-09-16 08:00
    Updated 2003-03-13 08:00
    Published 1997-09-23 08:00
    Product Standard Internationalised System Calls and Libraries (XPG4)
    Certification Program The Open Brand certification program
    Test Suite VSX4 version 4.3.6
    Test Identification XPG4.hdr/misc/shm 2
    Specification System Interfaces and Headers Issue 4
    Location in Spec See Problem Text
    Problem Summary PIN4.059 We believe that this failure is similar to PIN4.057 except for the following: The tests are being run on a 64-bit system where the shm_segsz type is defined as a size_t. On our implementation size_t i...
    Problem Text
    We believe that this failure is similar to PIN4.057 except for the following:

    The tests are being run on a 64-bit system where the shm_segsz type is defined
    as a size_t. On our implementation size_t is defined in our 64-bit system as
    a long (i.e. the shared memory segment size on a 64-bit system is a long).

    References: XPG5,
    ogtgbase archive 2628,
    http://www.rdg.opengroup.org/unix/version2/whatsnew/datasize.html

    Test Output
    200|708 2 16:05:15|TP Start
    520|708 2 8559 4 1|Feature test macros: -D_XOPEN_SOURCE
    520|708 2 8559 4 2|Compiler or run-time messages or results:
    520|708 2 8559 4 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 4 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 4 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 4 6|should be: 4
    520|708 2 8559 7 1|Feature test macros: -D_XOPEN_SOURCE -D_POSIX_SOURCE
    520|708 2 8559 7 2|Compiler or run-time messages or results:
    520|708 2 8559 7 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 7 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 7 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 7 6|should be: 4
    520|708 2 8559 10 1|Feature test macros: -D_XOPEN_SOURCE -D_POSIX_C_SOURCE=1
    520|708 2 8559 10 2|Compiler or run-time messages or results:
    520|708 2 8559 10 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 10 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 10 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 10 6|should be: 4
    520|708 2 8559 13 1|Feature test macros: -D_XOPEN_SOURCE -D_POSIX_C_SOURCE=2
    520|708 2 8559 13 2|Compiler or run-time messages or results:
    520|708 2 8559 13 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 13 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 13 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 13 6|should be: 4
    520|708 2 8559 16 1|Feature test macros: -D_XOPEN_SOURCE -D_POSIX_SOURCE
    -D_POSIX_C_SOURCE=1
    520|708 2 8559 16 2|Compiler or run-time messages or results:
    520|708 2 8559 16 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 16 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 16 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 16 6|should be: 4
    520|708 2 8559 19 1|Feature test macros: -D_XOPEN_SOURCE -D_POSIX_SOURCE
    -D_POSIX_C_SOURCE=2
    520|708 2 8559 19 2|Compiler or run-time messages or results:
    520|708 2 8559 19 3|cc: "cc02es.c", line 44: warning 728: Assignment converts
    long* to int* "shm_segszp".
    520|708 2 8559 19 4|Incorrect type: shm.shm_segsz
    520|708 2 8559 19 5|sizeof( shm.shm_segsz ): 8
    520|708 2 8559 19 6|should be: 4
    220|708 2 1 16:05:23|FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    This request relates to a change in the type associated with the
    shm_segsz member of the shm structure between issues XSH4.2 and XSH5.
    There was an inconsistency in XSH4.2 which was pointed out in PIN4.057,
    whereby the prototype for shmget() used a field of type size_t to source
    data into the shm_segsz member. This problem is exacerbated in a 64-bit
    system where the type size_t is likely to differ in size from an int.

    This is not a fault in the test suite, as claimed, but a discrepency in
    the XSH4.2 specification. The problem in question should not affect the
    portability of source code applications, and it is recommended that a
    Permanent Interpretation be granted.

    The problem should not arise in XSH5, where the anomaly has been resolved
    by changing the size of shm_segsz to size_t.

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

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