+#define SIG_HOLD ((void (*)(int)) 2)
+
+#define SIG_BLOCK 0
+#define SIG_UNBLOCK 1
+#define SIG_SETMASK 2
+
+#define SI_ASYNCNL (-60)
+#define SI_TKILL (-6)
+#define SI_SIGIO (-5)
+#define SI_ASYNCIO (-4)
+#define SI_MESGQ (-3)
+#define SI_TIMER (-2)
+#define SI_QUEUE (-1)
+#define SI_USER 0
+#define SI_KERNEL 128
+
+#define FPE_INTDIV 1
+#define FPE_INTOVF 2
+#define FPE_FLTDIV 3
+#define FPE_FLTOVF 4
+#define FPE_FLTUND 5
+#define FPE_FLTRES 6
+#define FPE_FLTINV 7
+#define FPE_FLTSUB 8
+
+#define ILL_ILLOPC 1
+#define ILL_ILLOPN 2
+#define ILL_ILLADR 3
+#define ILL_ILLTRP 4
+#define ILL_PRVOPC 5
+#define ILL_PRVREG 6
+#define ILL_COPROC 7
+#define ILL_BADSTK 8
+
+#define SEGV_MAPERR 1
+#define SEGV_ACCERR 2
+
+#define BUS_ADRALN 1
+#define BUS_ADRERR 2
+#define BUS_OBJERR 3
+
+#define CLD_EXITED 1
+#define CLD_KILLED 2
+#define CLD_DUMPED 3
+#define CLD_TRAPPED 4
+#define CLD_STOPPED 5
+#define CLD_CONTINUED 6
+
+typedef struct sigaltstack {
+ void *ss_sp;
+ int ss_flags;
+ size_t ss_size;
+} stack_t;
+
+union sigval {
+ int sival_int;
+ void *sival_ptr;
+};
+
+typedef struct {
+ int si_signo, si_errno, si_code;
+ union {
+ char __pad[128 - 2*sizeof(int) - sizeof(long)];
+ struct {
+ pid_t si_pid;
+ uid_t si_uid;
+ union sigval si_sigval;
+ } __rt;
+ struct {
+ unsigned int si_timer1, si_timer2;
+ } __timer;
+ struct {
+ pid_t si_pid;
+ uid_t si_uid;
+ int si_status;
+ clock_t si_utime, si_stime;
+ } __sigchld;
+ struct {
+ void *si_addr;
+ } __sigfault;
+ struct {
+ long si_band;
+ int si_fd;
+ } __sigpoll;
+ } __si_fields;
+} siginfo_t;
+#define si_pid __si_fields.__sigchld.si_pid
+#define si_uid __si_fields.__sigchld.si_uid
+#define si_status __si_fields.__sigchld.si_status
+#define si_utime __si_fields.__sigchld.si_utime
+#define si_stime __si_fields.__sigchld.si_stime
+#define si_value __si_fields.__rt.si_sigval
+#define si_addr __si_fields.__sigfault.si_addr
+#define si_band __si_fields.__sigpoll.si_band
+#define si_fd __si_fields.__sigpoll.si_fd
+#define si_timer1 __si_fields.__timer.si_timer1
+#define si_timer2 __si_fields.__timer.si_timer2
+#define si_ptr __si_fields.__rt.si_sigval.sival_ptr
+#define si_int __si_fields.__rt.si_sigval.sival_int
+
+struct sigaction {