illustrate creative use of $PS1

requested by Jari Aalto

mksh.1

@@ -1,4 +1,4 @@
-.\" $MirOS: src/bin/mksh/mksh.1,v 1.32 2006/05/08 11:59:41 tg Exp $
+.\" $MirOS: src/bin/mksh/mksh.1,v 1.33 2006/05/08 12:12:36 tg Exp $
 .\" $OpenBSD: ksh.1,v 1.109 2005/12/06 20:40:02 jmc Exp $
 .\" $OpenBSD: sh.1tbl,v 1.53 2004/12/10 01:56:56 jaredy Exp $
 .\"
@@ -1469,6 +1469,26 @@ can be put in the prompt by placing
 in
 .Ev PS1 .
 .Pp
+More advanced settings
+can be found in the file
+.Pa /etc/profile
+on any MirOS system as well as at
+.Pa http://cvs.mirbsd.de/contrib/samples/etc_profile
+or on the website), but you might like the following example
+(note that ${HOSTNAME:-$(hostname -s)} and the
+root-vs-user distinguishing clause are (in this example) executed at
+.Ev PS1
+assignment time, while the $USER and $PWD are escaped
+and thus will be evaluated each time a prompt is displayed):
+.Bd -literal -offset indent
+PS1="\e${USER}@${HOSTNAME:-$(hostname -s)}:\e$PWD $(
+	if [[ $(id -u) -eq 0 ]]; then
+		print '#'
+	else
+		print '$'
+	fi) "
+.Ed
+.Pp
 Note that since the command-line editors try to figure out how long the prompt
 is (so they know how far it is to the edge of the screen), escape codes in
 the prompt tend to mess things up.