2 #define SIG_BLOCK 0 /* for blocking signals */
5 #define SIG_UNBLOCK 1 /* for unblocking signals */
8 #define SIG_SETMASK 2 /* for setting the signal mask */
12 typedef void __signalfn_t(int);
13 typedef __signalfn_t __user *__sighandler_t;
15 typedef void __restorefn_t(void);
16 typedef __restorefn_t __user *__sigrestore_t;
18 #define SIG_DFL ((__force __sighandler_t)0) /* default signal handling */
19 #define SIG_IGN ((__force __sighandler_t)1) /* ignore signal */
20 #define SIG_ERR ((__force __sighandler_t)-1) /* error return from signal */