A NOTE has been added to this issue. ====================================================================== http://austingroupbugs.net/view.php?id=1039 ====================================================================== Reported By: kre Assigned To: ====================================================================== Project: 1003.1(2013)/Issue7+TC1 Issue ID: 1039 Category: Shell and Utilities Type: Clarification Requested Severity: Editorial Priority: normal Status: Interpretation Required Name: Robert Elz Organization: User Reference: Section: 2.5.2 Page Number: 2324 Line Number: 73759-73761 Interp Status: Pending Final Accepted Text: http://austingroupbugs.net/view.php?id=1039#c3617 ====================================================================== Date Submitted: 2016-03-26 07:30 UTC Last Modified: 2018-04-26 11:44 UTC ====================================================================== Summary: Which option flags should appear in $- ? ======================================================================
---------------------------------------------------------------------- (0004002) McDutchie (reporter) - 2018-04-26 11:44 http://austingroupbugs.net/view.php?id=1039#c4002 ---------------------------------------------------------------------- kre, I don't think you're going to get a guarantee that the 'set -$-' workaround is a no-op, because in fact it fails on most current and historical shells. Historical: $ sh -c 'set -$-' # Bourne shell, Xenix (1988) sh: -s: bad option(s) $ sh -c 'set -$-' # Bourne shell, Solaris 10.3 (2010) sh: -s: bad option(s) $ ksh -c 'set -$-' # ksh88, Solaris 10.3 (2010) ksh: -shc: bad option(s) Presumably it works on the historical ash (Almquist shell) as it does on all current derivatives, but I don't have any historical ash I can test. Current: $ ksh -c 'set -$-' # ksh93 ksh: set: -c: unknown option Usage: set [-sabefhkmnprtuvxBCGH] [-A name] [-o[option]] [arg ...] $ ksh -c 'set -$-' # NetBSD ksh (pdksh) ksh: set: -c: unknown option ksh: set: $ ksh -c 'set -$-' # OpenBSD sh and ksh (pdksh) ksh: set: -c: unknown option $ mksh -c 'set -$-' mksh: set: -c: unknown option $ bash -c 'set -$-' bash: line 0: set: -c: invalid option set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...] $ yash -c 'set -$-' set: the cmdline option cannot be changed once the shell has been initialized It only works on: - NetBSD sh (of course) - FreeBSD sh - dash - Busybox ash - zsh ...so basically on Almquist derivatives plus zsh. That minority is nowhere close to establishing de facto standard behaviour. Issue History Date Modified Username Field Change ====================================================================== 2016-03-26 07:30 kre New Issue 2016-03-26 07:30 kre Name => Robert Elz 2016-03-26 07:30 kre Section => 2.5.2 2016-03-26 07:30 kre Page Number => unknown 2016-03-26 07:30 kre Line Number => unknown 2016-03-26 08:12 Don Cragun Page Number unknown => 2324 2016-03-26 08:12 Don Cragun Line Number unknown => 73759-73761 2016-03-26 08:12 Don Cragun Interp Status => --- 2017-03-16 16:22 geoffclare Note Added: 0003617 2017-03-16 16:23 geoffclare Interp Status --- => Pending 2017-03-16 16:23 geoffclare Final Accepted Text => http://austingroupbugs.net/view.php?id=1039#c3617 2017-03-16 16:23 geoffclare Status New => Interpretation Required 2017-03-16 16:23 geoffclare Resolution Open => Accepted As Marked 2017-03-16 16:23 geoffclare Tag Attached: tc3-2008 2017-03-16 17:16 kre Note Added: 0003618 2017-03-16 17:31 joerg Note Added: 0003619 2017-03-16 17:38 joerg Note Edited: 0003619 2017-03-16 18:07 kre Note Added: 0003620 2017-03-17 09:09 geoffclare Note Added: 0003622 2017-03-17 10:46 kre Note Added: 0003624 2017-03-17 10:54 joerg Note Added: 0003625 2017-03-17 12:07 kre Note Added: 0003630 2017-03-17 12:51 joerg Note Added: 0003634 2017-03-17 13:05 kre Note Added: 0003636 2018-04-26 11:44 McDutchie Note Added: 0004002 ======================================================================
