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| ID | Category | Severity | Type | Date Submitted | Last Update | ||
| 0000987 | [1003.1(2013)/Issue7+TC1] Shell and Utilities | Comment | Enhancement Request | 2015-10-08 03:05 | 2016-07-14 15:18 | ||
| Reporter | dannyniu | View Status | public | ||||
| Assigned To | |||||||
| Priority | normal | Resolution | Rejected | ||||
| Status | Closed | ||||||
| Name | DannyNiu/NJF | ||||||
| Organization | |||||||
| User Reference | |||||||
| Section | 2.2.3 Quoting | ||||||
| Page Number | 2320 | ||||||
| Line Number | 73612-73616 | ||||||
| Interp Status | --- | ||||||
| Final Accepted Text | |||||||
| Summary | 0000987: Add example for quoting within command substitution within double-quotes. | ||||||
| Description |
I ran into some difficulty using command substitution to obtain filenames for a command to execute, mainly because of the <space> characters in the filenames. So I sought to quote them, but in my $(cmd), there's also quoting. I thought I had to use backslash inside, which was ugly. But turns out, `$' has special meaning in double quotes, so I didn't have to quote it again. So I think an example would do a better job explaining this feature. |
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| Desired Action |
Add the following informative text to the end of the section. When the <double-quote> character is needed within a double-quoted string, it should be escaped by a <backslash> character. example: foo="my name is \"bar\"" However, since characters enclosed in command substitutions are not affected by double quotes, <double-quote> characters within command substitutions within double-quoted strings do not need to be escaped. example: myvar="quoted $(command "substitution example")" |
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| Tags | No tags attached. | ||||||
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Notes |
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(0002859) Don Cragun (manager) 2015-10-08 03:43 |
The quoting rules for strings inside the $(...) form of command substitution are clearly stated on P2320, L73612-73616 and the Rationale for this section XRAT C.2.2, on P3677, L125674-125685 already contains examples showing how quoting works inside the $(...) form of command substitutions. |
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Issue History |
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| Date Modified | Username | Field | Change |
| 2015-10-08 03:05 | dannyniu | New Issue | |
| 2015-10-08 03:05 | dannyniu | Name | => DannyNiu/NJF |
| 2015-10-08 03:05 | dannyniu | Section | => "Shell & Utilities" >> "Shell Command Language" >> "Quoting" |
| 2015-10-08 03:05 | dannyniu | Page Number | => new |
| 2015-10-08 03:05 | dannyniu | Line Number | => new |
| 2015-10-08 03:29 | Don Cragun | Project | 2008-TC2 => 1003.1(2013)/Issue7+TC1 |
| 2015-10-08 03:43 | Don Cragun | Section | "Shell & Utilities" >> "Shell Command Language" >> "Quoting" => 2.2.3 Quoting |
| 2015-10-08 03:43 | Don Cragun | Page Number | new => 2320 |
| 2015-10-08 03:43 | Don Cragun | Line Number | new => 73612-73616 |
| 2015-10-08 03:43 | Don Cragun | Interp Status | => --- |
| 2015-10-08 03:43 | Don Cragun | Note Added: 0002859 | |
| 2016-07-14 15:18 | geoffclare | Status | New => Closed |
| 2016-07-14 15:18 | geoffclare | Resolution | Open => Rejected |
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