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Problem Report 2519 Details

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Report 2519 Actions

    Problem Report Number 2519
    Submitter's Classification Specification problem
    State Resolved
    Resolution Temporary Interpretation (TIN)
    Problem Resolution ID TIN.X.0129
    Raised 2006-07-31 14:02
    Updated 2006-08-04 02:49
    Published 2006-08-04 02:49
    Product Standard Commands and Utilities V4 (UNIX 03)
    Certification Program The Open Brand certification program
    Test Suite VSC version 5.2.8
    Test Identification /tset/POSIX.shell/shell/sh_05.ex.352
    Specification Shell and Utilities Issue 6
    Location in Spec XCU 2.6.3
    Problem Summary shell command substitution not implemented by historical systems
    Problem Text A recent change to the test suite has shown up a problem in
    the handling of command substitution by many existing shells.
    Although this has been a bug for many years, systems that have
    had this bug have not received any customer complaints related
    to this issue.

    This is a request to issue an intepretation to permit
    existing behavior.

    Although requested against UNIX 03, this also applies to
    XPG4, UNIX 95 and UNIX 98.


    Proposed wording for a future revision of the standard to
    document this matter.
    On XCU p40, change lines 1677-1679 to:

    With the $(command) form, all characters following the open parenthesis
    to the matching closing parenthesis constitute the command. Any valid
    shell script can be used for command, except:
    + a script consisting solely of redirections
    + a script containing unbalanced parentheses used as control
    operators (see Case Conditional Construct on page 53)
    which produce unspecified results.

    On p53, add after 2166:

    When used in a command-substitution $(), the open parenthesis in front
    of pattern is not optional.

    Note that changes would also be needed to sections of the rationale
    corresponding to this text.
    Test Output /tset/POSIX.shell/shell/sh_05.ex 352 Failed
    Test Information:
    Assertion #352 (A): All characters within the parentheses of the
    command substitution expression constitute the command
    Expected exit code = 0; Received 2
    Standard output isn't the same as file 'sh_352.eso'
    diff of "out.stdout" and "sh_352.eso":
    *** out.stdout (Date Deleted)
    --- sh_352.eso (Date Deleted)
    ***************
    *** 25,27 ****
    --- 25,30 ----
    sh_352.23
    sh_352.24
    sh_352.25a sh_352.25b
    + sh_352.26
    + sh_352.27 ) ) )
    + sh_352.28 )
    Standard error isn't empty
    Contents of out.stderr:
    sh_352.sh[41]: Syntax error at line 41 : `case' is not matched.

    Review Information

    Review Type SA Review
    Start Date 2006-07-31 14:02
    Last Updated 2006-08-04 02:00
    Completed 2006-08-04 02:00
    Status Complete
    Review Resolution Temporary Interpretation (TIN)
    Review Conclusion This PR represents an agreed Temporary Interpretation

    Problem Reporting System Options:

     

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