-/* Type of a signal handler. */
-typedef void __signalfn_t(int);
-typedef __signalfn_t __user *__sighandler_t;
-
-typedef void __restorefn_t(void);
-typedef __restorefn_t __user *__sigrestore_t;
-
-#define SIG_DFL ((__sighandler_t)0) /* default signal handling */
-#define SIG_IGN ((__sighandler_t)1) /* ignore signal */
-#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */