Module Name: src Committed By: martin Date: Fri Dec 7 13:23:49 UTC 2018
Modified Files: src/bin/sh [netbsd-8]: sh.1 var.c var.h Log Message: Pull up following revision(s) (requested by kre in ticket #1127): bin/sh/var.h: revision 1.38 (via patch) bin/sh/var.c: revision 1.72 bin/sh/sh.1: revision 1.211 (via patch) Alter a design botch when magic (self modifying) variables were added to sh ... in other shells, setting such a variable (for most of them) causes it to lose its special properties, and act the same as any other variable. I had assumed that was just implementor laziness... I was wrong. >From now on the NetBSD shell will act like the others, and if vars like HOSTNAME (and SECONDS, etc) are used as variables in a script or whatever, they will act just like normal variables (and unless this happens when they have been made local, or as a variable-assignment as a prefix to a command, the special properties they would have had otherwise are lost for the remainder of the life of the (sub-)shell in which the variables were set). Importing a value from the environment counts as setting the value for this purpose (so if HOSTNAME is set in the environment, the value there will be the value $HOSTNAME expands to). The two exceptions to this are LINENO and RANDOM. RANDOM needs to be able to be set to (re-)set its seed. LINENO needs to be able to be set (at least in the "local" command) to achieve the desired functionality. It is unlikely that any (sane) script is going to want to use those two as normal vars however. While here, fix a minor bug in popping local vars (fn return) that need to notify the shell of changes in value (like PATH). Change sh(1) to reflect this alteration. Also add doc of the (forgotten) magic var EUSER (which has been there since the others were added), and add a few more vars (which are documented in other places in sh(1) - like ENV) into the defined or used variable list (as well as wherever else they appear). XXX pullup -8 To generate a diff of this commit: cvs rdiff -u -r1.146.2.5 -r1.146.2.6 src/bin/sh/sh.1 cvs rdiff -u -r1.55.2.3 -r1.55.2.4 src/bin/sh/var.c cvs rdiff -u -r1.28.8.1 -r1.28.8.2 src/bin/sh/var.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.