View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000683 | 1003.1(2013)/Issue7+TC1 | System Interfaces | public | 2013-04-24 22:16 | 2019-06-10 08:55 |
| Reporter | philip-guenther | Assigned To | |||
| Priority | normal | Severity | Editorial | Type | Clarification Requested |
| Status | Closed | Resolution | Accepted | ||
| Name | Philip Guenther | ||||
| Organization | OpenBSD | ||||
| User Reference | |||||
| Section | poll() | ||||
| Page Number | 1417 | ||||
| Line Number | 46793-46795 | ||||
| Interp Status | --- | ||||
| Final Accepted Text | |||||
| Summary | 0000683: return value of poll() unclear when multiple pollfds have the same fd | ||||
| Description | What should poll() return if multiple pollfd structures passed to it have the same 'fd' value and more than one of those has a non-zero revents on return? First off, it should be noted that nothing in the description bans such a call, so I don't think an error return is permitted for that cause. The RETURN VALUE section of the poll() page states: Upon successful completion, poll() shall return a non-negative value. A positive value indicates the total number of file descriptors that have been selected (that is, file descriptors for which the revents member is non-zero). Saying that it's a count of the "file descriptors" would seem to mean that no matter how many pollfds reference the given fd, the return value must only be incremented by one. However, the systems I've tested (Solaris 10, FreeBSD 8, Linux 2.6.18, OpenBSD 5.2) all return the total number of pollfd structures that have revents non-zero. | ||||
| Desired Action | Change this: Upon successful completion, poll() shall return a non-negative value. A positive value indicates the total number of file descriptors that have been selected (that is, file descriptors for which the revents member is non-zero). to something like this: Upon successful completion, poll() shall return a non-negative value. A positive value indicates the total number of pollfd structures that have selected events (that is, those for which the revents member is non-zero). | ||||
| Tags | tc2-2008 | ||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2013-04-24 22:16 | philip-guenther | New Issue | |
| 2013-04-24 22:16 | philip-guenther | Name | => Philip Guenther |
| 2013-04-24 22:16 | philip-guenther | Organization | => OpenBSD |
| 2013-04-24 22:16 | philip-guenther | Section | => poll() |
| 2013-04-24 22:16 | philip-guenther | Page Number | => 1417 |
| 2013-04-24 22:16 | philip-guenther | Line Number | => 46793-46795 |
| 2013-04-25 16:11 |
|
Interp Status | => --- |
| 2013-04-25 16:11 |
|
Status | New => Resolved |
| 2013-04-25 16:11 |
|
Resolution | Open => Accepted |
| 2013-04-25 16:11 |
|
Tag Attached: tc2-2008 | |
| 2019-06-10 08:55 | agadmin | Status | Resolved => Closed |
