View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001124 | 1003.1(2008)/Issue 7 | System Interfaces | public | 2017-03-05 02:46 | 2018-08-16 15:49 |
| Reporter | dannyniu | Assigned To | ajosey | ||
| Priority | normal | Severity | Editorial | Type | Enhancement Request |
| Status | Closed | Resolution | Rejected | ||
| Name | DannyNiu/NJF | ||||
| Organization | |||||
| User Reference | |||||
| Section | System Interfaces - write() | ||||
| Page Number | Informative section | ||||
| Line Number | Rationales | ||||
| Interp Status | --- | ||||
| Final Accepted Text | |||||
| Summary | 0001124: Mention different IO semantics of pipe and FIFO. | ||||
| Description | In the rationale section for the write() function, we've taken note of the fact that, some systems allows a write of length zero to indicate end-of-file to the other end of a pipe. In my opinion, this feature is the by-product of some systems using the message-nondiscard IO semantics for pipe, such as 8th edition we've noted in the text. And I think it's reasonable, that we further note such semantics, by mentioning on such systems, read() from a pipe, will return the content of at most one write() call. | ||||
| Desired Action | Add to after the text: Also, some existing systems ... permit a write of zero bytes ... indicates a successful write of an end-of-file indication. The following: On such systems, a read() from a pipe or a FIFO, may return at most the content of one write() call. Applications should not assume the system would provide either semantics unless otherwise configured through implementation-defined method. | ||||
| Tags | No tags attached. | ||||
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This behavior was provided by UNIX Version 8 for pipes only and is a documented feature of STREAMS devices running in message nondiscard mode. STREAMS processing in POSIX has been made obsolescent and is expected to be removed from a future version of the standard. Therefore, this change request is rejected. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2017-03-05 02:46 | dannyniu | New Issue | |
| 2017-03-05 02:46 | dannyniu | Status | New => Under Review |
| 2017-03-05 02:46 | dannyniu | Assigned To | => ajosey |
| 2017-03-05 02:46 | dannyniu | Name | => DannyNiu/NJF |
| 2017-03-05 02:46 | dannyniu | Section | => System Interfaces - write() |
| 2017-03-05 02:46 | dannyniu | Page Number | => Informative section |
| 2017-03-05 02:46 | dannyniu | Line Number | => Rationales |
| 2017-03-05 06:10 | dannyniu | Desired Action Updated | |
| 2018-08-16 15:48 | Don Cragun | Note Added: 0004083 | |
| 2018-08-16 15:49 | Don Cragun | Interp Status | => --- |
| 2018-08-16 15:49 | Don Cragun | Status | Under Review => Closed |
| 2018-08-16 15:49 | Don Cragun | Resolution | Open => Rejected |
