View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000521 | 1003.1(2008)/Issue 7 | Shell and Utilities | public | 2011-11-30 10:46 | 2019-06-10 08:55 |
| Reporter | geoffclare | Assigned To | ajosey | ||
| Priority | normal | Severity | Objection | Type | Error |
| Status | Closed | Resolution | Accepted | ||
| Name | Geoff Clare | ||||
| Organization | The Open Group | ||||
| User Reference | |||||
| Section | 2.9.2 Pipelines | ||||
| Page Number | 2318 | ||||
| Line Number | 73179 | ||||
| Interp Status | Approved | ||||
| Final Accepted Text | see 0000521:0001082 | ||||
| Summary | 0000521: Behaviour of !(command) should not be specified | ||||
| Description | Currently section 2.9.2, in combination with the tokenisation rules and grammar, requires that !(command) is treated as a pipeline beginning with the reserved word ! and containing a subshell command. However, in ksh88 this was treated as a negated pathname expansion !(pattern), not a negated subshell command. Since the POSIX shell description was based on ksh88, specifying negated pipelines in a way that made ksh88 non-conforming was clearly not intended. | ||||
| Desired Action | After: [!] command1 [ | command2 ...] add a new paragraph: If the pipeline begins with the reserved word ! and command1 is a subshell command, the application shall ensure that the ( operator at the beginning of command1 is separated from the ! by one or more <blank> characters. The behavior of the reserved word ! immediately followed by the ( operator is unspecified. Cross-volume change to XRAT... At page 3665 line 124711 section C.2.9.2 after: The reserved word ! allows more flexible testing using AND and OR lists. append this to the sentence: The behavior of !( is unspecified because in the Korn Shell this introduces a negated pathname expansion. Portable applications need to separate the ! and ( to ensure the command is treated as a negated subshell. | ||||
| Tags | tc2-2008 | ||||
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Interpretation response ------------------------ The standard states that !(command) shall be a negated subshell, and conforming implementations must conform to this. However, concerns have been raised about this which are being referred to the sponsor. Rationale: ------------- Requiring a negated subshell conflicts with shells that provide an extension of negated pathname expansion. Notes to the Editor (not part of this interpretation): ------------------------------------------------------- See Desired Action |
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Interpretation proposed 29 June 2012 for final 45 day review |
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Interpretation approved 30 Aug 2012 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2011-11-30 10:46 | geoffclare | New Issue | |
| 2011-11-30 10:46 | geoffclare | Status | New => Under Review |
| 2011-11-30 10:46 | geoffclare | Assigned To | => ajosey |
| 2011-11-30 10:46 | geoffclare | Name | => Geoff Clare |
| 2011-11-30 10:46 | geoffclare | Organization | => The Open Group |
| 2011-11-30 10:46 | geoffclare | Section | => 2.9.2 Pipelines |
| 2011-11-30 10:46 | geoffclare | Page Number | => 2318 |
| 2011-11-30 10:46 | geoffclare | Line Number | => 73179 |
| 2011-11-30 10:46 | geoffclare | Interp Status | => --- |
| 2011-12-15 17:27 | eblake | Note Added: 0001082 | |
| 2011-12-15 17:27 | eblake | Status | Under Review => Interpretation Required |
| 2011-12-15 17:27 | eblake | Resolution | Open => Accepted |
| 2011-12-15 17:27 | eblake | Interp Status | --- => Pending |
| 2011-12-15 17:27 | eblake | Final Accepted Text | => see 0000521:0001082 |
| 2011-12-15 17:28 | eblake | Tag Attached: tc2-2008 | |
| 2011-12-15 17:29 | eblake | Note Edited: 0001082 | |
| 2012-06-29 16:16 | ajosey | Interp Status | Pending => Proposed |
| 2012-06-29 16:16 | ajosey | Note Added: 0001292 | |
| 2012-08-30 09:15 | ajosey | Interp Status | Proposed => Approved |
| 2012-08-30 09:15 | ajosey | Note Added: 0001355 | |
| 2019-06-10 08:55 | agadmin | Status | Interpretation Required => Closed |
