fix more enviroment pollution

rc/bin/juke

@@ -1,7 +1,6 @@
 #!/bin/rc
-
+rfork e
 wide=`{echo $vgasize | sed 's/(.*)x.*x.*/\1 > 240/' | hoc}
-
 debug=0
 tflag=''
 wflag=''

rc/bin/sysinfo

@@ -1,4 +1,6 @@
 #!/bin/rc
+rfork e
+
 fn logprog{ 
         echo % `{echo $"* | sed 's/#/''#''/g'} 
         $* 

rc/bin/sysupdate

@@ -1,24 +1,16 @@
 #!/bin/rc
-
-rfork n
-cd /
-
-incoming=1
-
-switch($1){
-case -h
-	echo usage: sysupdate [-i] >[1=2]
-	exit usage
-case -i
-	incoming=0
-}
-
 rfork n
 cd /
 if(! test -d .hg)
 	bind -ac /dist/plan9front /
-
-if(~ $incoming 1)
-	hg incoming
+while(! ~ $#* 0){
+	switch($1){
+	case -i
+		hg incoming
+	case *
+		echo usage: sysupdate [-i] >[1=2]
+		exit usage
+	}
+	shift
+}
 hg -v pull -u
-

rc/bin/tap

@@ -1,4 +1,5 @@
 #!/bin/rc
+rfork e
 
 v=()
 

sys/src/games/music/juke.rc

@@ -1,7 +1,6 @@
 #!/bin/rc
-
+rfork e
 wide=`{echo $vgasize | sed 's/(.*)x.*x.*/\1 > 240/' | hoc}
-
 debug=0
 tflag=''
 wflag=''