+#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
+
+typedef struct sigaltstack stack_t;
+
+#endif
+
+#include <bits/signal.h>
+
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
+
+#define SIG_HOLD ((void (*)(int)) 2)
+
+#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 SEGV_BNDERR 3
+#define SEGV_PKUERR 4
+#define SEGV_MTEAERR 8
+#define SEGV_MTESERR 9
+
+#define BUS_ADRALN 1
+#define BUS_ADRERR 2
+#define BUS_OBJERR 3
+#define BUS_MCEERR_AR 4
+#define BUS_MCEERR_AO 5
+
+#define CLD_EXITED 1
+#define CLD_KILLED 2
+#define CLD_DUMPED 3
+#define CLD_TRAPPED 4
+#define CLD_STOPPED 5
+#define CLD_CONTINUED 6
+
+union sigval {
+ int sival_int;
+ void *sival_ptr;
+};
+
+typedef struct {
+#ifdef __SI_SWAP_ERRNO_CODE
+ int si_signo, si_code, si_errno;
+#else
+ int si_signo, si_errno, si_code;
+#endif
+ union {
+ char __pad[128 - 2*sizeof(int) - sizeof(long)];
+ struct {
+ union {
+ struct {
+ pid_t si_pid;
+ uid_t si_uid;
+ } __piduid;
+ struct {
+ int si_timerid;
+ int si_overrun;
+ } __timer;
+ } __first;
+ union {
+ union sigval si_value;
+ struct {
+ int si_status;
+ clock_t si_utime, si_stime;
+ } __sigchld;
+ } __second;
+ } __si_common;
+ struct {
+ void *si_addr;
+ short si_addr_lsb;
+ union {
+ struct {
+ void *si_lower;
+ void *si_upper;
+ } __addr_bnd;
+ unsigned si_pkey;
+ } __first;
+ } __sigfault;
+ struct {
+ long si_band;
+ int si_fd;
+ } __sigpoll;
+ struct {
+ void *si_call_addr;
+ int si_syscall;
+ unsigned si_arch;
+ } __sigsys;
+ } __si_fields;
+} siginfo_t;
+#define si_pid __si_fields.__si_common.__first.__piduid.si_pid
+#define si_uid __si_fields.__si_common.__first.__piduid.si_uid
+#define si_status __si_fields.__si_common.__second.__sigchld.si_status
+#define si_utime __si_fields.__si_common.__second.__sigchld.si_utime
+#define si_stime __si_fields.__si_common.__second.__sigchld.si_stime
+#define si_value __si_fields.__si_common.__second.si_value
+#define si_addr __si_fields.__sigfault.si_addr
+#define si_addr_lsb __si_fields.__sigfault.si_addr_lsb
+#define si_lower __si_fields.__sigfault.__first.__addr_bnd.si_lower
+#define si_upper __si_fields.__sigfault.__first.__addr_bnd.si_upper
+#define si_pkey __si_fields.__sigfault.__first.si_pkey
+#define si_band __si_fields.__sigpoll.si_band
+#define si_fd __si_fields.__sigpoll.si_fd
+#define si_timerid __si_fields.__si_common.__first.__timer.si_timerid
+#define si_overrun __si_fields.__si_common.__first.__timer.si_overrun
+#define si_ptr si_value.sival_ptr
+#define si_int si_value.sival_int
+#define si_call_addr __si_fields.__sigsys.si_call_addr
+#define si_syscall __si_fields.__sigsys.si_syscall
+#define si_arch __si_fields.__sigsys.si_arch
+
+struct sigaction {