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ID | Category | Severity | Type | Date Submitted | Last Update | ||
0001511 | [Issue 8 drafts] Shell and Utilities | Editorial | Enhancement Request | 2021-08-11 16:51 | 2024-06-11 09:12 | ||
Reporter | kre | View Status | public | ||||
Assigned To | |||||||
Priority | normal | Resolution | Accepted As Marked | ||||
Status | Closed | Product Version | Draft 2 | ||||
Name | Robert Elz | ||||||
Organization | |||||||
User Reference | |||||||
Section | XCU 2.5.3 | ||||||
Page Number | 2315 | ||||||
Line Number | 74583-9 | ||||||
Final Accepted Text | Note: 0005438 | ||||||
Summary | 0001511: LINENO description claims to be a User Portability Utilities option var, but has no margin tag or shading | ||||||
Description |
The description of the variable LINENO in XCU 2.5.3 concludes with the sentence: This volume of POSIX.1-202x specifies the effects of the variable only for systems supporting the User Portability Utilities option. (lines 74587-9) but there is no shading, nor a UP margin tag, unlike, for example the description of PS1 just below (lines 74598 and following) and others. If anyone feels the need, the description of what LINENO actually does or how it works is singularly useless, for example, it says (paraphrasing) "counts lines from 1 within a script or function" which is fine except when the function is in a script, and it isn't clear if LINENO starts from 1 inside the function, or continues counting from 1 in the script. Nor is it clear when the "current sequentlial line number" is determined exactly for example if the script contains (with the echo word being on line 1) echo ${LINENO} \ ${LINENO} printf done One could say that when the echo command is executed, the current sequential line number is 3, as the shell has read past the \n at the end of the continuation line of the echo command (but not yet parsed the printf command), it must have done to know that the echo command has finished, which it needs to know before it can be executed. But is printing 3 twice useful? And does any shell actually do that? If not that, should it print 1, or 2 (twice) or both 1 and 2 (once each) (which is what the NetBSD shell does, where $LINENO gives the line number on which it appears, and it is very precisely spefified just what that is for all of the weird cases - including when LINENO has been exported). But all of this is a giant can of worms, definitely not just editorial, and not really part of this report (just documented here for posterity). |
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Desired Action |
Not sure what the correct way to deal with this one is (nor how to specify what should be done) - that is, it isn't clear if the intent is that LINENO not be specified as existing at all if UP isn't included, or that it is intended to exist, but it just isn't specified how it behaves in that case. |
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Tags | tc3-2008 | ||||||
Attached Files | |||||||
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Notes | |
(0005438) geoffclare (manager) 2021-08-12 09:30 |
In Issue 7 (C181) the effect of UP on PS1/2/4 is described the same way as for LINENO. It was changed in the Issue 8 drafts as part of the overhaul of PS1/2/4 in bug 0001006. Therefore I think LINENO should be updated the same way, and since bug 1006 was tagged tc3-2008 so should this bug. On 2018 edition page 2352 line 74935 section 2.5.3, add a new first paragraph: [UP]The processing of the LINENO shell variable shall be supported if the system supports the User Portability Utilities option.[/UP] On 2018 edition page 2352 line 74939 section 2.5.3, delete:
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Issue History | |||
Date Modified | Username | Field | Change |
2021-08-11 16:51 | kre | New Issue | |
2021-08-11 16:51 | kre | Name | => Robert Elz |
2021-08-11 16:51 | kre | Section | => XCU 2.5.3 |
2021-08-11 16:51 | kre | Page Number | => 2315 |
2021-08-11 16:51 | kre | Line Number | => 74583-9 |
2021-08-12 09:30 | geoffclare | Note Added: 0005438 | |
2021-08-12 09:32 | geoffclare | Relationship added | related to 0001006 |
2021-12-16 16:07 | geoffclare | Final Accepted Text | => Note: 0005438 |
2021-12-16 16:07 | geoffclare | Status | New => Resolved |
2021-12-16 16:07 | geoffclare | Resolution | Open => Accepted As Marked |
2021-12-16 16:07 | geoffclare | Tag Attached: tc3-2008 | |
2022-01-11 11:35 | geoffclare | Status | Resolved => Applied |
2024-06-11 09:12 | agadmin | Status | Applied => Closed |
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