@@ -11,10 +11,11 @@
 
 ;;======================================================================
 ;; Process convience utils
 ;;======================================================================
 
+(use regex)
 (declare (unit process))
 (declare (uses common))
 
 (define (conservative-read port)
   (let loop ((res ""))
@@ -147,5 +148,17 @@
    (file-exists? (conc "/proc/" pid))
    (let-values (((rpid exit-type exit-signal)(process-wait pid #t)))
        (and (number? rpid)
 	    (equal? rpid pid)))))
 	 
+(define (process:get-sub-pids pid)
+  (with-input-from-pipe
+   (conc "pstree -A -p " pid) ;; | tr 'a-z\\-+`()\\.' ' ' " pid)
+   (lambda ()
+     (let loop ((inl (read-line))
+		(res '()))
+       (if (eof-object? inl)
+	   (reverse res)
+	   (let ((nums (map string->number
+			    (string-split-fields "\\d+" inl))))
+	     (loop (read-line)
+		   (append res nums))))))))