View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000156 | 1003.1(2008)/Issue 7 | Shell and Utilities | public | 2009-09-22 15:31 | 2013-04-16 13:06 |
| 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 | df | ||||
| Page Number | 2595 | ||||
| Line Number | 83575 | ||||
| Interp Status | Approved | ||||
| Final Accepted Text | 0000156:0000289 | ||||
| Summary | 0000156: df -k and free inodes | ||||
| Description | The description of the df utility states: "The format of the default output from df is unspecified, but all space figures are reported in 512-byte units, unless the -k option is specified. This output shall contain at least the file system names, amount of available space on each of these file systems, [XSI] and the number of free file slots, or inodes, available; when -t is specified, the output shall contain the total allocated space as well.[/XSI]" Since this talks about the file units in the default output with and without -k, it implies that the other requirements on the default output (specifically the XSI requirement to report the number of free inodes) also apply when -k is used. However, current and historical practice on System-V based systems is that the number of free inodes is not reported when -k is used. | ||||
| Desired Action | Change "and the number of free file slots" to "and, if no options other than -t are specified, the number of free file slots" | ||||
| Tags | tc1-2008 | ||||
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Previous resolution was in error, this requires an interpretation. "The standard states the requirement as listed above, and conforming implementations must conform to this. However, concerns have been raised about this which are being referred to the sponsor." While investigating this, we discovered that some XSI-branded implementations do not provide the required inode information, even without the -k option being used. This interpretation request concerns the requirements for the -k case only. The inode information requirement is still in place for the default case. |
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Interpretation response ------------------------ The standard states the requirements for the df utility, and conforming implementations must conform to this. However, concerns have been raised about this which are being referred to the sponsor." Rationale: ------------- None. Notes to the Editor (not part of this interpretation): ------------------------------------------------------- Make the change suggested by the submitter |
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Recommendation: conform to existing practice. Since none of the most common implementation of 'df' return inode information without '-i' perhaps it would be more productive to conform POSIX to standard practice. Standard practice is what systems admins expect, what their scripts reflect, and what POSIX should standardize unless there is a compelling reason to change differ. The default behavior of 'df', whether including '-k' or not is: Filesystem 1K-blocks Used Available Use% MountPoint Neither 512K blocks nor inodes are returned. This is because that information is rarely what users of this utility want. |
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(Response to 0000156:0000292) Currently the only standard way to find out the number of free inodes is to use df without -P or -k. If we remove the requirement for df to output the number of free inodes when invoked this way, we would have to add a -i option so that there is still a way to obtain this information. We cannot add an option in a TC; it would have to wait for the next revision. Therefore I don't believe we can consider making such a change in this interpretation (because we need to fix the -k problem in TC1, but can't add -i). However, we could certainly consider it for the next revision. If you would like to set the ball rolling on that, please submit a new aardvark with the type field set to "Enhancement Request". |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2009-09-22 15:31 | geoffclare | New Issue | |
| 2009-09-22 15:31 | geoffclare | Status | New => Under Review |
| 2009-09-22 15:31 | geoffclare | Assigned To | => ajosey |
| 2009-09-22 15:31 | geoffclare | Name | => Geoff Clare |
| 2009-09-22 15:31 | geoffclare | Organization | => The Open Group |
| 2009-09-22 15:31 | geoffclare | Section | => df |
| 2009-09-22 15:31 | geoffclare | Page Number | => 2595 |
| 2009-09-22 15:31 | geoffclare | Line Number | => 83575 |
| 2009-09-22 15:31 | geoffclare | Interp Status | => --- |
| 2009-09-24 16:09 | msbrown | Status | Under Review => Resolved |
| 2009-09-24 16:09 | msbrown | Resolution | Open => Accepted |
| 2009-09-24 16:17 | msbrown | Interp Status | --- => Pending |
| 2009-09-24 16:17 | msbrown | Note Added: 0000241 | |
| 2009-09-24 16:17 | msbrown | Status | Resolved => Interpretation Required |
| 2009-11-07 07:24 | ajosey | Note Added: 0000289 | |
| 2009-11-07 07:25 | ajosey | Interp Status | Pending => Proposed |
| 2009-11-07 07:25 | ajosey | Final Accepted Text | => 0000156:0000289 |
| 2009-11-08 17:13 | Roger Marquis | Note Added: 0000292 | |
| 2009-11-11 09:40 | geoffclare | Note Added: 0000296 | |
| 2009-12-07 16:55 | ajosey | Interp Status | Proposed => Approved |
| 2010-09-21 11:20 | geoffclare | Tag Attached: tc1-2008 | |
| 2013-04-16 13:06 | ajosey | Status | Interpretation Required => Closed |
