mtree.sh: reverse last two parameters

This way we can treat DESTDIR like a special case just as the build
system does (i.e., if not set, assume DESTDIR="/").

etc/Makefile

@@ -37,7 +37,7 @@ install: installpw	# installpw needed to bootstrap pw db
 	mkdir -p $(ETC) $(USRLIB)
 	mkdir -p $(ETC)/devmand/scripts
 	@echo "Making hierarchy.."
-	sh mtree.sh mtree/minix.tree ${TOOL_AWK} ${TOOL_STAT} ${DESTDIR} ${MKUNPRIVED}
+	sh mtree.sh mtree/minix.tree ${TOOL_AWK} ${TOOL_STAT} ${MKUNPRIVED} ${DESTDIR};	# DESTDIR must be last; special case!
 	@for f in $(FILES1); do if [ -f $(ETC)/$$f ]; then :; else cp $$f $(ETC)/$$f; chmod 755 $(ETC)/$$f; fi; done
 	@for f in $(USRFILES); do cp usr/$$f $(USR)/$$f; chmod 644 $(USR)/$$f; done
 	@for f in $(FILES3); do if [ -f $(USRETC)/$$f ]; then :; else cp usr/$$f $(USRETC); chmod 755 $(USRETC)/$$f; fi; done

etc/mtree.sh

@@ -1,15 +1,20 @@
 #!/bin/sh
 set -e
 
-if [ $# -ne 5 ]
-then	echo "Usage: $0 mtreefile TOOL_AWK TOOL_STAT DEST_DIR UNPRIV"
+if [ $# -ne 4 -a $# -ne 5 ]
+then	echo "Usage: $0 mtreefile TOOL_AWK TOOL_STAT UNPRIV DESTDIR"
 	exit 1
 fi
 
 AWK=$2
 STAT=$3
-DESTDIR=$4
-UNPRIV=$5
+UNPRIV=$4
+
+if [ $# -eq 5 ]
+then	DESTDIR=$5
+else	DESTDIR="/"	# If not set, default to root (i.e., normal case)
+fi
+
 cat "$1" | while read line
 do
 	NF="`echo $line | ${AWK} '{ print NF }'`"