A NOTE has been added to this issue. ====================================================================== https://austingroupbugs.net/view.php?id=1457 ====================================================================== Reported By: steffen Assigned To: ajosey ====================================================================== Project: 1003.1(2016/18)/Issue7+TC2 Issue ID: 1457 Category: Shell and Utilities Type: Enhancement Request Severity: Editorial Priority: normal Status: Under Review Name: Steffen Nurpmeso Organization: User Reference: Section: Vol. 3: Shell and Utilities. Page Number: (page or range of pages) Line Number: (Line or range of lines) Interp Status: --- Final Accepted Text: ====================================================================== Date Submitted: 2021-03-09 21:21 UTC Last Modified: 2022-02-25 21:24 UTC ====================================================================== Summary: Add readlink(1) utility ======================================================================
---------------------------------------------------------------------- (0005721) mirabilos (reporter) - 2022-02-25 21:24 https://austingroupbugs.net/view.php?id=1457#c5721 ---------------------------------------------------------------------- mksh has a realpath builtin, please don’t add an incompatible requirement if you do ;-) It takes an optional first argument "--" (skipped) and a mandatory second argument (file); no options, and any other arguments cause an error message as well. I’ve recently learnt about some differences between BSD and POSIX realpath on the C level (from reading the OpenSSH mailing list). The realpath in mksh is specified to allow referring to nōnexistant files in existing directories, which I understand is very much not a POSIX thing. Without that, though, I’d consider it good as useless (one can always add a test -e afterwards). https://github.com/MirBSD/mksh/blob/5d135a8ee38d84c5a4f6c175b9a831d5acbc641b/misc.c#L1886 in case of interest. I understand other OSes have diverging realpath utilities. mksh has a mode where a utility can call the builtin or an external one depending on the existence of the latter and, optionally, presence of flags. The latter is implemented for realpath, so “realpath -h” calls coreutils’ realpath on my GNU system, but not on the BSD system without an external realpath utility. This is a compromise. “readlink” is important. I’d argue for standardised readlink without and with -f but not adding realpath (unless the latter can be done in a way that doesn’t blow up (remember the story of cat(1) that went out and came back waving flags) mksh or, worse, make its implementation incompatible). Issue History Date Modified Username Field Change ====================================================================== 2021-03-09 21:21 steffen New Issue 2021-03-09 21:21 steffen Status New => Under Review 2021-03-09 21:21 steffen Assigned To => ajosey 2021-03-09 21:21 steffen Name => Steffen Nurpmeso 2021-03-09 21:21 steffen Section => Vol. 3: Shell and Utilities. 2021-03-09 21:21 steffen Page Number => (page or range of pages) 2021-03-09 21:21 steffen Line Number => (Line or range of lines) 2021-03-10 04:11 emaste Issue Monitored: emaste 2022-02-22 15:58 geoffclare Note Added: 0005700 2022-02-22 16:01 geoffclare Note Edited: 0005700 2022-02-22 16:09 geoffclare Note Edited: 0005700 2022-02-22 16:11 geoffclare Project 1003.1(2008)/Issue 7 => 1003.1(2016/18)/Issue7+TC2 2022-02-22 16:13 geoffclare Note Edited: 0005700 2022-02-22 21:39 emaste Note Added: 0005701 2022-02-22 21:41 emaste Note Deleted: 0005701 2022-02-22 22:19 steffen Note Added: 0005702 2022-02-22 22:34 calestyo Issue Monitored: calestyo 2022-02-23 08:32 geoffclare Note Added: 0005703 2022-02-23 13:31 emaste Note Added: 0005704 2022-02-23 13:38 calestyo Note Added: 0005705 2022-02-24 09:28 geoffclare Note Added: 0005706 2022-02-24 09:32 geoffclare Note Edited: 0005700 2022-02-24 09:34 geoffclare Note Edited: 0005700 2022-02-24 09:36 geoffclare Note Edited: 0005703 2022-02-25 21:24 mirabilos Note Added: 0005721 ======================================================================
