Initial revision

which

@@ -0,0 +1,11 @@
+#!/bin/sh
+arg=$1
+for d in `echo $PATH | sed -e 's/:/ /g'`
+do
+	if [ -x $d/$arg ]; then
+		echo $d/$arg
+		exit 0
+	fi
+done
+echo "${arg}: Command not found."
+exit 1