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ID | Category | Severity | Type | Date Submitted | Last Update | ||
0001171 | [1003.1(2016/18)/Issue7+TC2] Base Definitions and Headers | Objection | Error | 2017-11-22 09:52 | 2019-11-08 10:32 | ||
Reporter | martinr | View Status | public | ||||
Assigned To | |||||||
Priority | normal | Resolution | Accepted As Marked | ||||
Status | Applied | ||||||
Name | Martin Rehak | ||||||
Organization | Oracle Corporation | ||||||
User Reference | |||||||
Section | <sys/time.h> | ||||||
Page Number | 399 | ||||||
Line Number | 13572 | ||||||
Interp Status | --- | ||||||
Final Accepted Text | See Note: 0004242 | ||||||
Summary | 0001171: <sys/select.h> doesn’t allow to include <sys/time.h> namespace anymore | ||||||
Description |
The standard in XPG7 version says for <sys/select.h>: "Inclusion of the <sys/select.h> header may make visible all symbols from the headers <signal.h> and <time.h>." In previous version (XPG6) there was also <sys/time.h> allowed to be included in <sys/select.h>, but we were not able to find out why the change happened. We are just guessing that intention was to do reverse inclusion: The select() was defined in <sys/time.h> in earlier versions of the standard (pre-XPG6). However, with the introduction of pselect() in <sys/select.h> in XPG6, the move was made to define ALL the related definitions for pselect() and select() in <sys/select.h>. As noted on the pselect() page in SUSv4 Rationale section, "Backwards-compatibility to existing XSI implementations is handled by allowing <sys/time.h> to include <sys/select.h>. This is KEY statement. Looking at the <sys/select.h> header, it appears the intent was that <sys/select.h> would now define the timeval structure and it's members. In XPG7, the specification for both <sys/time.h> and <sys/select.h> states that the respective header: "...shall define the timeval structure, which shall include at least the following members: time_t tv_sec Seconds. suseconds_t tv_usec Microseconds." This appears to be a bug. Given that <sys/time.h> further states that "Inclusion of the <sys/time.h> header may make visible all the symbols from the <sys/select.h> header", along with the previously quoted Rationale, it appears the intent was indeed to move the timeval structure definition to <sys/select.h>. Hence, the description in <sys/time.h> should probably read: "The <sys/time.h> header shall define the timeval structure as described in <sys/select.h>. |
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Desired Action |
1) Clarify why the mentioned change happened. 2) If our guessing is right change the <sys/time.h> description (Page 399 / Line: 13572) to: The <sys/time.h> header shall define the timeval structure as described in <sys/select.h>. |
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Tags | tc3-2008 | ||||||
Attached Files | |||||||
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Date Modified | Username | Field | Change |
2017-11-22 09:52 | martinr | New Issue | |
2017-11-22 09:52 | martinr | Name | => Martin Rehak |
2017-11-22 09:52 | martinr | Organization | => Oracle Corporation |
2017-11-22 09:52 | martinr | Section | => <sys/time.h> |
2017-11-22 09:52 | martinr | Page Number | => 399 |
2017-11-22 09:52 | martinr | Line Number | => 13572 |
2019-02-07 16:23 | nick | Note Added: 0004242 | |
2019-02-07 16:24 | nick | Interp Status | => --- |
2019-02-07 16:24 | nick | Final Accepted Text | => See Note: 0004242 |
2019-02-07 16:24 | nick | Status | New => Resolved |
2019-02-07 16:24 | nick | Resolution | Open => Accepted As Marked |
2019-02-07 16:24 | nick | Tag Attached: tc3-2008 | |
2019-11-08 10:32 | geoffclare | Status | Resolved => Applied |
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