View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000818 | 1003.1(2013)/Issue7+TC1 | Shell and Utilities | public | 2014-01-30 04:04 | 2019-06-10 08:54 |
| Reporter | eblake | Assigned To | |||
| Priority | normal | Severity | Objection | Type | Error |
| Status | Closed | Resolution | Accepted As Marked | ||
| Name | Eric Blake | ||||
| Organization | Red Hat | ||||
| User Reference | ebb.fmemopen | ||||
| Section | fmemopen | ||||
| Page Number | 873 | ||||
| Line Number | 29196 | ||||
| Interp Status | --- | ||||
| Final Accepted Text | See 0000818:0002184 | ||||
| Summary | 0000818: fmemopen should allow 0-size buffer | ||||
| Description | The ERRORS section of fmemopen is clear that it shall fail for a buffer length of 0; however, the DESCRIPTION text does not describe this scenario, and a more useful behavior is to treat it as a valid file that reaches EOF on first read (similar to /dev/null). Furthermore, fmemopen was standardized based on the pre-existing behavior of glibc, and glibc originally implemented fmemopen to allow a 0-length buffer for reads (the fmemopen succeeds, and read() hits EOF immediately; rather than fmemopen failing) and for writes (if the buffer is growable, it will grow on first write; otherwise it behaves like a full device). See this glibc bug for more details on pre-standardized behavior: https://sourceware.org/bugzilla/show_bug.cgi?id=11216 | ||||
| Desired Action | Delete line 29196 [fmemopen ERRORS]:[EINVAL] The size argument specifies a buffer size of zero. | ||||
| Tags | C11, tc2-2008 | ||||
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Please note that the fmemopen interface is also included in ISO/IEC TR 24731-2:2010. Thus, any issues with that interface (including any others previously addressed or in the process of being addressed) should be coordinated with WG14 (presumably through the existing liaison) so that TR 24731-2 can remain consistent with POSIX, if not already coordinated. (That TR also has open_memstream, asprintf, vasprintf, scanf/wscanf %m, getdelim, getline, strdup, strndup, open_wmemstream, aswprintf, vaswprintf, getwdelim and getwline.) |
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Delete line 29196. Add a new paragraph after 29200: [EINVAL] The size argument specifies a buffer size of zero and the implementation does not support this. Add to Future Directions after line 29235 A future revision of this standard may require support of zero length buffer streams explicitly. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-01-30 04:04 | eblake | New Issue | |
| 2014-01-30 04:04 | eblake | Name | => Eric Blake |
| 2014-01-30 04:04 | eblake | Organization | => Red Hat |
| 2014-01-30 04:04 | eblake | User Reference | => ebb.fmemopen |
| 2014-01-30 04:04 | eblake | Section | => fmemopen |
| 2014-01-30 04:04 | eblake | Page Number | => (page or range of pages) |
| 2014-01-30 04:04 | eblake | Line Number | => (Line or range of lines) |
| 2014-01-30 04:04 | eblake | Interp Status | => --- |
| 2014-01-30 04:06 | eblake | Relationship added | related to 0000657 |
| 2014-01-30 04:06 | eblake | Relationship added | related to 0000587 |
| 2014-01-30 15:10 | jsm28 | Note Added: 0002119 | |
| 2014-03-13 16:14 | nick | Tag Attached: C11 | |
| 2014-03-13 16:28 | nick | Page Number | (page or range of pages) => 873 |
| 2014-03-13 16:28 | nick | Line Number | (Line or range of lines) => 29196 |
| 2014-03-13 16:28 | nick | Note Added: 0002184 | |
| 2014-03-13 16:28 | nick | Status | New => Resolved |
| 2014-03-13 16:28 | nick | Resolution | Open => Accepted As Marked |
| 2014-03-13 16:28 | nick | Final Accepted Text | => See 0000818:0002184 |
| 2014-03-13 16:29 | nick | Tag Attached: tc2-2008 | |
| 2019-06-10 08:54 | agadmin | Status | Resolved => Closed |
