Does there exist standard way to run external program in Common Lisp?

Question

In clisp, the following code works:

(defun hit-history () (shell \"tail ssqHitNum.txt\"))

However, in Clozure CL, the shell fu

Answer 1

(defun dot->png (fname thunk)
   (with-open-file (*standard-output*
       fname
       :direction :output
       :if-exists :superseded)
     (funcall thunk))
   (ccl:run-program "dot" (list "-Tpng -O" fname))
)

i run success in ccl(clozure),when study land of lisp p123