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37 #ifndef _SYS_SIGNAL_H_
38 #define _SYS_SIGNAL_H_
40 #include <sys/cdefs.h>
41 #include <sys/_types.h>
42 #include <sys/_sigset.h>
44 #include <machine/_limits.h> /* __MINSIGSTKSZ */
45 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
47 #if __POSIX_VISIBLE >= 200809
49 #include <sys/_pthreadtypes.h>
50 #include <sys/_timespec.h>
52 #ifndef _SIZE_T_DECLARED
53 typedef __size_t size_t;
54 #define _SIZE_T_DECLARED
57 #ifndef _UID_T_DECLARED
58 typedef __uid_t uid_t;
59 #define _UID_T_DECLARED
62 #endif /* __POSIX_VISIBLE >= 200809 */
65 * System defined signals.
67 #if __POSIX_VISIBLE || __XSI_VISIBLE
68 #define SIGHUP 1 /* hangup */
70 #define SIGINT 2 /* interrupt */
71 #if __POSIX_VISIBLE || __XSI_VISIBLE
72 #define SIGQUIT 3 /* quit */
74 #define SIGILL 4 /* illegal instr. (not reset when caught) */
76 #define SIGTRAP 5 /* trace trap (not reset when caught) */
78 #define SIGABRT 6 /* abort() */
80 #define SIGIOT SIGABRT /* compatibility */
81 #define SIGEMT 7 /* EMT instruction */
83 #define SIGFPE 8 /* floating point exception */
84 #if __POSIX_VISIBLE || __XSI_VISIBLE
85 #define SIGKILL 9 /* kill (cannot be caught or ignored) */
87 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
88 #define SIGBUS 10 /* bus error */
90 #define SIGSEGV 11 /* segmentation violation */
91 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
92 #define SIGSYS 12 /* non-existent system call invoked */
94 #if __POSIX_VISIBLE || __XSI_VISIBLE
95 #define SIGPIPE 13 /* write on a pipe with no one to read it */
96 #define SIGALRM 14 /* alarm clock */
98 #define SIGTERM 15 /* software termination signal from kill */
99 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
100 #define SIGURG 16 /* urgent condition on IO channel */
102 #if __POSIX_VISIBLE || __XSI_VISIBLE
103 #define SIGSTOP 17 /* sendable stop signal not from tty */
104 #define SIGTSTP 18 /* stop signal from tty */
105 #define SIGCONT 19 /* continue a stopped process */
106 #define SIGCHLD 20 /* to parent on child stop or exit */
107 #define SIGTTIN 21 /* to readers pgrp upon background tty read */
108 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */
111 #define SIGIO 23 /* input/output possible signal */
114 #define SIGXCPU 24 /* exceeded CPU time limit */
115 #define SIGXFSZ 25 /* exceeded file size limit */
116 #define SIGVTALRM 26 /* virtual time alarm */
117 #define SIGPROF 27 /* profiling time alarm */
120 #define SIGWINCH 28 /* window size changes */
121 #define SIGINFO 29 /* information request */
123 #if __POSIX_VISIBLE || __XSI_VISIBLE
124 #define SIGUSR1 30 /* user defined signal 1 */
125 #define SIGUSR2 31 /* user defined signal 2 */
128 #define SIGTHR 32 /* reserved by thread library. */
129 #define SIGLWP SIGTHR
130 #define SIGLIBRT 33 /* reserved by real-time library. */
136 #define SIG_DFL ((__sighandler_t *)0)
137 #define SIG_IGN ((__sighandler_t *)1)
138 #define SIG_ERR ((__sighandler_t *)-1)
139 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */
140 #define SIG_HOLD ((__sighandler_t *)3)
143 * Type of a signal handling function.
145 * Language spec sez signal handlers take exactly one arg, even though we
146 * actually supply three. Ugh!
148 * We don't try to hide the difference by leaving out the args because
149 * that would cause warnings about conformant programs. Nonconformant
150 * programs can avoid the warnings by casting to (__sighandler_t *) or
151 * sig_t before calling signal() or assigning to sa_handler or sv_handler.
153 * The kernel should reverse the cast before calling the function. It
154 * has no way to do this, but on most machines 1-arg and 3-arg functions
155 * have the same calling protocol so there is no problem in practice.
156 * A bit in sa_flags could be used to specify the number of args.
158 typedef void __sighandler_t(int);
160 #if __POSIX_VISIBLE || __XSI_VISIBLE
161 #ifndef _SIGSET_T_DECLARED
162 #define _SIGSET_T_DECLARED
163 typedef __sigset_t sigset_t;
167 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500
169 /* Members as suggested by Annex C of POSIX 1003.1b. */
172 /* 6.0 compatibility */
177 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__))
181 /* 6.0 compatibility */
188 #if __POSIX_VISIBLE >= 199309
193 int sigev_notify; /* Notification type */
194 int sigev_signo; /* Signal number */
195 union sigval sigev_value; /* Signal value */
199 void (*_function)(union sigval);
200 struct pthread_attr **_attribute;
202 unsigned short _kevent_flags;
208 #define sigev_notify_kqueue sigev_signo
209 #define sigev_notify_kevent_flags _sigev_un._kevent_flags
210 #define sigev_notify_thread_id _sigev_un._threadid
212 #define sigev_notify_function _sigev_un._sigev_thread._function
213 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
215 #define SIGEV_NONE 0 /* No async notification. */
216 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */
217 #define SIGEV_THREAD 2 /* Call back from another pthread. */
219 #define SIGEV_KEVENT 3 /* Generate a kevent. */
220 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */
223 #endif /* __POSIX_VISIBLE >= 199309 */
225 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE
226 typedef struct __siginfo {
227 int si_signo; /* signal number */
228 int si_errno; /* errno association */
230 * Cause of signal, one of the SI_ macros or signal-specific
231 * values, i.e. one of the FPE_... values for SIGFPE. This
232 * value is equivalent to the second argument to an old-style
233 * FreeBSD signal handler.
235 int si_code; /* signal code */
236 __pid_t si_pid; /* sending process */
237 __uid_t si_uid; /* sender's ruid */
238 int si_status; /* exit value */
239 void *si_addr; /* faulting instruction */
240 union sigval si_value; /* signal value */
243 int _trapno;/* machine specific trap code */
253 long _band; /* band event for SIGPOLL */
254 } _poll; /* was this ever used ? */
256 int _syscall; /* Syscall number for signals
257 * delivered as a result of
258 * system calls denied by
268 #define si_trapno _reason._fault._trapno
269 #define si_timerid _reason._timer._timerid
270 #define si_overrun _reason._timer._overrun
271 #define si_mqd _reason._mesgq._mqd
272 #define si_band _reason._poll._band
273 #define si_syscall _reason._capsicum._syscall
275 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__))
277 int si_signo; /* signal number */
278 int si_errno; /* errno association */
279 int si_code; /* signal code */
280 __pid_t si_pid; /* sending process */
281 __uid_t si_uid; /* sender's ruid */
282 int si_status; /* exit value */
283 uint32_t si_addr; /* faulting instruction */
284 union sigval32 si_value; /* signal value */
287 int _trapno;/* machine specific trap code */
297 int32_t _band; /* band event for SIGPOLL */
298 } _poll; /* was this ever used ? */
308 /* codes for SIGILL */
309 #define ILL_ILLOPC 1 /* Illegal opcode. */
310 #define ILL_ILLOPN 2 /* Illegal operand. */
311 #define ILL_ILLADR 3 /* Illegal addressing mode. */
312 #define ILL_ILLTRP 4 /* Illegal trap. */
313 #define ILL_PRVOPC 5 /* Privileged opcode. */
314 #define ILL_PRVREG 6 /* Privileged register. */
315 #define ILL_COPROC 7 /* Coprocessor error. */
316 #define ILL_BADSTK 8 /* Internal stack error. */
318 /* codes for SIGBUS */
319 #define BUS_ADRALN 1 /* Invalid address alignment. */
320 #define BUS_ADRERR 2 /* Nonexistent physical address. */
321 #define BUS_OBJERR 3 /* Object-specific hardware error. */
322 #define BUS_OOMERR 100 /* Non-standard: No memory. */
324 /* codes for SIGSEGV */
325 #define SEGV_MAPERR 1 /* Address not mapped to object. */
326 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */
328 #define SEGV_PKUERR 100 /* x86: PKU violation */
330 /* codes for SIGFPE */
331 #define FPE_INTOVF 1 /* Integer overflow. */
332 #define FPE_INTDIV 2 /* Integer divide by zero. */
333 #define FPE_FLTDIV 3 /* Floating point divide by zero. */
334 #define FPE_FLTOVF 4 /* Floating point overflow. */
335 #define FPE_FLTUND 5 /* Floating point underflow. */
336 #define FPE_FLTRES 6 /* Floating point inexact result. */
337 #define FPE_FLTINV 7 /* Invalid floating point operation. */
338 #define FPE_FLTSUB 8 /* Subscript out of range. */
339 #define FPE_FLTIDO 9 /* Input denormal operation */
341 /* codes for SIGTRAP */
342 #define TRAP_BRKPT 1 /* Process breakpoint. */
343 #define TRAP_TRACE 2 /* Process trace trap. */
344 #define TRAP_DTRACE 3 /* DTrace induced trap. */
345 #define TRAP_CAP 4 /* Capabilities protective trap. */
347 /* codes for SIGCHLD */
348 #define CLD_EXITED 1 /* Child has exited */
349 #define CLD_KILLED 2 /* Child has terminated abnormally but */
350 /* did not create a core file */
351 #define CLD_DUMPED 3 /* Child has terminated abnormally and */
352 /* created a core file */
353 #define CLD_TRAPPED 4 /* Traced child has trapped */
354 #define CLD_STOPPED 5 /* Child has stopped */
355 #define CLD_CONTINUED 6 /* Stopped child has continued */
357 /* codes for SIGPOLL */
358 #define POLL_IN 1 /* Data input available */
359 #define POLL_OUT 2 /* Output buffers available */
360 #define POLL_MSG 3 /* Input message available */
361 #define POLL_ERR 4 /* I/O Error */
362 #define POLL_PRI 5 /* High priority input available */
363 #define POLL_HUP 6 /* Device disconnected */
367 #if __POSIX_VISIBLE || __XSI_VISIBLE
371 * Signal vector "template" used in sigaction call.
375 void (*__sa_handler)(int);
376 void (*__sa_sigaction)(int, struct __siginfo *, void *);
377 } __sigaction_u; /* signal handler */
378 int sa_flags; /* see signal options below */
379 sigset_t sa_mask; /* signal mask to apply */
382 #define sa_handler __sigaction_u.__sa_handler
386 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */
387 #define sa_sigaction __sigaction_u.__sa_sigaction
390 #if __POSIX_VISIBLE || __XSI_VISIBLE
391 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
392 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */
395 #define SA_ONSTACK 0x0001 /* take signal on signal stack */
396 #define SA_RESTART 0x0002 /* restart system call on signal return */
397 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
398 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
399 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
400 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
404 #define NSIG 32 /* number of old signals (counting 0) */
407 #if __POSIX_VISIBLE || __XSI_VISIBLE
408 #define SI_NOINFO 0 /* No signal info besides si_signo. */
409 #define SI_USER 0x10001 /* Signal sent by kill(). */
410 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */
411 #define SI_TIMER 0x10003 /* Signal generated by expiration of */
412 /* a timer set by timer_settime(). */
413 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */
414 /* an asynchronous I/O request.*/
415 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */
416 /* message on an empty message queue. */
417 #define SI_KERNEL 0x10006
418 #define SI_LWP 0x10007 /* Signal sent by thr_kill */
421 #define SI_UNDEFINED 0
425 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
426 typedef void __siginfohandler_t(int, struct __siginfo *, void *);
431 #define __stack_t sigaltstack
433 typedef struct __stack_t stack_t;
435 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */
436 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
437 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */
438 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
442 * Structure used in sigaltstack call. Its definition is always
443 * needed for __ucontext. If __BSD_VISIBLE is defined, the structure
444 * tag is actually sigaltstack.
447 void *ss_sp; /* signal stack base */
448 __size_t ss_size; /* signal stack length */
449 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
455 * Signal vector "template" used in sigvec call.
458 __sighandler_t *sv_handler; /* signal handler */
459 int sv_mask; /* signal mask to apply */
460 int sv_flags; /* see signal options below */
463 #define SV_ONSTACK SA_ONSTACK
464 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
465 #define SV_RESETHAND SA_RESETHAND
466 #define SV_NODEFER SA_NODEFER
467 #define SV_NOCLDSTOP SA_NOCLDSTOP
468 #define SV_SIGINFO SA_SIGINFO
469 #define sv_onstack sv_flags /* isn't compatibility wonderful! */
472 /* Keep this in one place only */
473 #if defined(_KERNEL) && defined(COMPAT_43) && \
482 * Structure used in sigstack call.
485 void *ss_sp; /* signal stack pointer */
486 int ss_onstack; /* current status */
490 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112
492 * Macro for converting signal number to a mask suitable for
495 #define sigmask(m) (1 << ((m)-1))
499 #define BADSIG SIG_ERR
502 #if __POSIX_VISIBLE || __XSI_VISIBLE
504 * Flags for sigprocmask:
506 #define SIG_BLOCK 1 /* block specified signal set */
507 #define SIG_UNBLOCK 2 /* unblock specified signal set */
508 #define SIG_SETMASK 3 /* set specified signal set */
512 * For historical reasons; programs expect signal's return value to be
513 * defined by <sys/signal.h>.
516 __sighandler_t *signal(int, __sighandler_t *);
519 #endif /* !_SYS_SIGNAL_H_ */