usage and argument handling for bin/rm* and bin/touch* utilities

bin/rmclassall

@@ -1,2 +1,24 @@
 #!/bin/sh
-find . \( -name '*.class' \) -print | xargs -t rm
+
+# default is pwd
+if [ "$#" -eq 0 ]
+then
+   set -- .
+elif [ "$1" = "-h" -o "$1" = "-help" ]
+then
+   echo "Usage: ${0##*/} [dir1] .. [dirN]"
+   echo "    remove all .class files"
+   exit 1
+fi
+
+for i
+do
+   if [ -d "$i" ]
+   then
+      echo "removing all .class files"
+      find $i -name '*.class' -print | xargs -t rm
+   else
+      echo "no directory: $i"
+   fi
+done
+#------------------------------------------------------------------------------