+/* Exit statuses for GNU programs that exec other programs. */
+enum
+{
+ EXIT_CANCELED = 125, /* Internal error prior to exec attempt. */
+ EXIT_CANNOT_INVOKE = 126, /* Program located, but not usable. */
+ EXIT_ENOENT = 127 /* Could not find program to exec. */
+};
+
+/* Defined in callproc.c. */
+
+extern void block_child_signal (void);
+extern void unblock_child_signal (void);
+extern Lisp_Object encode_current_directory (void);
+extern void record_kill_process (struct Lisp_Process *, Lisp_Object);
+
+/* Defined in sysdep.c. */
+