• be friendlier to AT&T ksh: use only signed (standard) integers

‣ now, a “ksh93” just requires ‘function precmd { :; }; set -o emacs’
    afterwards to get rid of the annoying error messages
  ‣ I could lose that with the following idiom:
    - PS1='$(precmd)…
    + PS1='$(typeset -i e=$?; typeset -f precmd >&- && { (return $e); precmd })…
    but it didn’t seem worthwhile to me
• remove explicit licence blah, normal ./copyright applies

dot.mkshrc

@@ -1,41 +1,18 @@
-# $MirOS: src/bin/mksh/dot.mkshrc,v 1.32 2008/04/19 22:03:19 tg Stab $
+# $MirOS: src/bin/mksh/dot.mkshrc,v 1.33 2008/04/22 13:48:15 tg Rel $
 #-
-# Copyright (c) 2007, 2008
+# ~/.mkshrc: mksh initialisation file for interactive shells
-#	Thorsten “mirabilos” Glaser <tg@mirbsd.de>
-#
-# Provided that these terms and disclaimer and all copyright notices
-# are retained or reproduced in an accompanying document, permission
-# is granted to deal in this work without restriction, including un-
-# limited rights to use, publicly perform, distribute, sell, modify,
-# merge, give away, or sublicence.
-#
-# Advertising materials mentioning features or use of this work must
-# display the following acknowledgement:
-#	This product includes material provided by Thorsten Glaser.
-#
-# This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
-# the utmost extent permitted by applicable law, neither express nor
-# implied; without malicious intent or gross negligence. In no event
-# may a licensor, author or contributor be held liable for indirect,
-# direct, other damage, loss, or other issues arising in any way out
-# of dealing in the work, even if advised of the possibility of such
-# damage or existence of a defect, except proven that it results out
-# of said person's immediate fault when using the work as intended.
-#-
-# sample mksh initialisation file for interactive shells; install as
-# /etc/skel/.mkshrc (as root, for new accounts) or copy to ~/.mkshrc
 
 : ${EDITOR:=/bin/ed} ${TERM:=vt100} ${HOSTNAME:=$(ulimit -c 0;hostname -s 2>&-)}
 [[ $HOSTNAME = @(localhost|*([	 ])) ]] && HOSTNAME=$(ulimit -c 0;hostname 2>&-)
 : ${HOSTNAME:=nil}; PS1='#'; [[ "$(ulimit -c 0; id -u 2>&-)" -eq 0 ]] || PS1='$'
 function precmd {
-	typeset -Ui10 e=$?
+	typeset -i e=$?
 
 	(( e )) && print -n "$e|"
 }
 PS1='$(precmd)${USER:=$(ulimit -c 0;id -un 2>&- || print \?)}@${HOSTNAME%%.*}:$(
 	typeset pfx=~ wd=${PWD:-?}
-	typeset -Ui n=${COLUMNS:-80}/3; (( n = n < 7 ? 7 : n ))
+	typeset -i n=${COLUMNS:-80}/3; (( n = n < 7 ? 7 : n ))
 	wd=${wd/#$pfx/~}
 	pfx=; while (( (${#pfx} + ${#wd}) > n )); do
 		if [[ $wd = */* ]]; then