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36 * @(#)signal.h 8.4 (Berkeley) 5/4/95
39 #ifndef _SYS_SIGNAL_H_
40 #define _SYS_SIGNAL_H_
42 #include <sys/cdefs.h>
43 #include <sys/_types.h>
44 #include <sys/_sigset.h>
46 #include <machine/_limits.h> /* __MINSIGSTKSZ */
47 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
49 #if __POSIX_VISIBLE >= 200809
51 #include <sys/_pthreadtypes.h>
52 #include <sys/_timespec.h>
54 #ifndef _SIZE_T_DECLARED
55 typedef __size_t size_t;
56 #define _SIZE_T_DECLARED
59 #ifndef _UID_T_DECLARED
60 typedef __uid_t uid_t;
61 #define _UID_T_DECLARED
64 #endif /* __POSIX_VISIBLE >= 200809 */
67 * System defined signals.
69 #if __POSIX_VISIBLE || __XSI_VISIBLE
70 #define SIGHUP 1 /* hangup */
72 #define SIGINT 2 /* interrupt */
73 #if __POSIX_VISIBLE || __XSI_VISIBLE
74 #define SIGQUIT 3 /* quit */
76 #define SIGILL 4 /* illegal instr. (not reset when caught) */
78 #define SIGTRAP 5 /* trace trap (not reset when caught) */
80 #define SIGABRT 6 /* abort() */
82 #define SIGIOT SIGABRT /* compatibility */
83 #define SIGEMT 7 /* EMT instruction */
85 #define SIGFPE 8 /* floating point exception */
86 #if __POSIX_VISIBLE || __XSI_VISIBLE
87 #define SIGKILL 9 /* kill (cannot be caught or ignored) */
89 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
90 #define SIGBUS 10 /* bus error */
92 #define SIGSEGV 11 /* segmentation violation */
93 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
94 #define SIGSYS 12 /* non-existent system call invoked */
96 #if __POSIX_VISIBLE || __XSI_VISIBLE
97 #define SIGPIPE 13 /* write on a pipe with no one to read it */
98 #define SIGALRM 14 /* alarm clock */
100 #define SIGTERM 15 /* software termination signal from kill */
101 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
102 #define SIGURG 16 /* urgent condition on IO channel */
104 #if __POSIX_VISIBLE || __XSI_VISIBLE
105 #define SIGSTOP 17 /* sendable stop signal not from tty */
106 #define SIGTSTP 18 /* stop signal from tty */
107 #define SIGCONT 19 /* continue a stopped process */
108 #define SIGCHLD 20 /* to parent on child stop or exit */
109 #define SIGTTIN 21 /* to readers pgrp upon background tty read */
110 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */
113 #define SIGIO 23 /* input/output possible signal */
116 #define SIGXCPU 24 /* exceeded CPU time limit */
117 #define SIGXFSZ 25 /* exceeded file size limit */
118 #define SIGVTALRM 26 /* virtual time alarm */
119 #define SIGPROF 27 /* profiling time alarm */
122 #define SIGWINCH 28 /* window size changes */
123 #define SIGINFO 29 /* information request */
125 #if __POSIX_VISIBLE || __XSI_VISIBLE
126 #define SIGUSR1 30 /* user defined signal 1 */
127 #define SIGUSR2 31 /* user defined signal 2 */
130 #define SIGTHR 32 /* reserved by thread library. */
131 #define SIGLWP SIGTHR
132 #define SIGLIBRT 33 /* reserved by real-time library. */
138 #define SIG_DFL ((__sighandler_t *)0)
139 #define SIG_IGN ((__sighandler_t *)1)
140 #define SIG_ERR ((__sighandler_t *)-1)
141 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */
142 #define SIG_HOLD ((__sighandler_t *)3)
145 * Type of a signal handling function.
147 * Language spec sez signal handlers take exactly one arg, even though we
148 * actually supply three. Ugh!
150 * We don't try to hide the difference by leaving out the args because
151 * that would cause warnings about conformant programs. Nonconformant
152 * programs can avoid the warnings by casting to (__sighandler_t *) or
153 * sig_t before calling signal() or assigning to sa_handler or sv_handler.
155 * The kernel should reverse the cast before calling the function. It
156 * has no way to do this, but on most machines 1-arg and 3-arg functions
157 * have the same calling protocol so there is no problem in practice.
158 * A bit in sa_flags could be used to specify the number of args.
160 typedef void __sighandler_t(int);
162 #if __POSIX_VISIBLE || __XSI_VISIBLE
163 #ifndef _SIGSET_T_DECLARED
164 #define _SIGSET_T_DECLARED
165 typedef __sigset_t sigset_t;
169 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500
171 /* Members as suggested by Annex C of POSIX 1003.1b. */
174 /* 6.0 compatibility */
179 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__))
183 /* 6.0 compatibility */
190 #if __POSIX_VISIBLE >= 199309
195 int sigev_notify; /* Notification type */
196 int sigev_signo; /* Signal number */
197 union sigval sigev_value; /* Signal value */
201 void (*_function)(union sigval);
202 struct pthread_attr **_attribute;
204 unsigned short _kevent_flags;
210 #define sigev_notify_kqueue sigev_signo
211 #define sigev_notify_kevent_flags _sigev_un._kevent_flags
212 #define sigev_notify_thread_id _sigev_un._threadid
214 #define sigev_notify_function _sigev_un._sigev_thread._function
215 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
217 #define SIGEV_NONE 0 /* No async notification. */
218 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */
219 #define SIGEV_THREAD 2 /* Call back from another pthread. */
221 #define SIGEV_KEVENT 3 /* Generate a kevent. */
222 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */
225 #endif /* __POSIX_VISIBLE >= 199309 */
227 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE
228 typedef struct __siginfo {
229 int si_signo; /* signal number */
230 int si_errno; /* errno association */
232 * Cause of signal, one of the SI_ macros or signal-specific
233 * values, i.e. one of the FPE_... values for SIGFPE. This
234 * value is equivalent to the second argument to an old-style
235 * FreeBSD signal handler.
237 int si_code; /* signal code */
238 __pid_t si_pid; /* sending process */
239 __uid_t si_uid; /* sender's ruid */
240 int si_status; /* exit value */
241 void *si_addr; /* faulting instruction */
242 union sigval si_value; /* signal value */
245 int _trapno;/* machine specific trap code */
255 long _band; /* band event for SIGPOLL */
256 } _poll; /* was this ever used ? */
258 int _syscall; /* Syscall number for signals
259 * delivered as a result of
260 * system calls denied by
270 #define si_trapno _reason._fault._trapno
271 #define si_timerid _reason._timer._timerid
272 #define si_overrun _reason._timer._overrun
273 #define si_mqd _reason._mesgq._mqd
274 #define si_band _reason._poll._band
275 #define si_syscall _reason._capsicum._syscall
277 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__))
279 int si_signo; /* signal number */
280 int si_errno; /* errno association */
281 int si_code; /* signal code */
282 __pid_t si_pid; /* sending process */
283 __uid_t si_uid; /* sender's ruid */
284 int si_status; /* exit value */
285 uint32_t si_addr; /* faulting instruction */
286 union sigval32 si_value; /* signal value */
289 int _trapno;/* machine specific trap code */
299 int32_t _band; /* band event for SIGPOLL */
300 } _poll; /* was this ever used ? */
310 /* codes for SIGILL */
311 #define ILL_ILLOPC 1 /* Illegal opcode. */
312 #define ILL_ILLOPN 2 /* Illegal operand. */
313 #define ILL_ILLADR 3 /* Illegal addressing mode. */
314 #define ILL_ILLTRP 4 /* Illegal trap. */
315 #define ILL_PRVOPC 5 /* Privileged opcode. */
316 #define ILL_PRVREG 6 /* Privileged register. */
317 #define ILL_COPROC 7 /* Coprocessor error. */
318 #define ILL_BADSTK 8 /* Internal stack error. */
320 /* codes for SIGBUS */
321 #define BUS_ADRALN 1 /* Invalid address alignment. */
322 #define BUS_ADRERR 2 /* Nonexistent physical address. */
323 #define BUS_OBJERR 3 /* Object-specific hardware error. */
324 #define BUS_OOMERR 100 /* Non-standard: No memory. */
326 /* codes for SIGSEGV */
327 #define SEGV_MAPERR 1 /* Address not mapped to object. */
328 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */
330 #define SEGV_PKUERR 100 /* x86: PKU violation */
332 /* codes for SIGFPE */
333 #define FPE_INTOVF 1 /* Integer overflow. */
334 #define FPE_INTDIV 2 /* Integer divide by zero. */
335 #define FPE_FLTDIV 3 /* Floating point divide by zero. */
336 #define FPE_FLTOVF 4 /* Floating point overflow. */
337 #define FPE_FLTUND 5 /* Floating point underflow. */
338 #define FPE_FLTRES 6 /* Floating point inexact result. */
339 #define FPE_FLTINV 7 /* Invalid floating point operation. */
340 #define FPE_FLTSUB 8 /* Subscript out of range. */
341 #define FPE_FLTIDO 9 /* Input denormal operation */
343 /* codes for SIGTRAP */
344 #define TRAP_BRKPT 1 /* Process breakpoint. */
345 #define TRAP_TRACE 2 /* Process trace trap. */
346 #define TRAP_DTRACE 3 /* DTrace induced trap. */
347 #define TRAP_CAP 4 /* Capabilities protective trap. */
349 /* codes for SIGCHLD */
350 #define CLD_EXITED 1 /* Child has exited */
351 #define CLD_KILLED 2 /* Child has terminated abnormally but */
352 /* did not create a core file */
353 #define CLD_DUMPED 3 /* Child has terminated abnormally and */
354 /* created a core file */
355 #define CLD_TRAPPED 4 /* Traced child has trapped */
356 #define CLD_STOPPED 5 /* Child has stopped */
357 #define CLD_CONTINUED 6 /* Stopped child has continued */
359 /* codes for SIGPOLL */
360 #define POLL_IN 1 /* Data input available */
361 #define POLL_OUT 2 /* Output buffers available */
362 #define POLL_MSG 3 /* Input message available */
363 #define POLL_ERR 4 /* I/O Error */
364 #define POLL_PRI 5 /* High priority input available */
365 #define POLL_HUP 6 /* Device disconnected */
369 #if __POSIX_VISIBLE || __XSI_VISIBLE
373 * Signal vector "template" used in sigaction call.
377 void (*__sa_handler)(int);
378 void (*__sa_sigaction)(int, struct __siginfo *, void *);
379 } __sigaction_u; /* signal handler */
380 int sa_flags; /* see signal options below */
381 sigset_t sa_mask; /* signal mask to apply */
384 #define sa_handler __sigaction_u.__sa_handler
388 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */
389 #define sa_sigaction __sigaction_u.__sa_sigaction
392 #if __POSIX_VISIBLE || __XSI_VISIBLE
393 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
394 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */
397 #define SA_ONSTACK 0x0001 /* take signal on signal stack */
398 #define SA_RESTART 0x0002 /* restart system call on signal return */
399 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
400 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
401 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
402 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
406 #define NSIG 32 /* number of old signals (counting 0) */
409 #if __POSIX_VISIBLE || __XSI_VISIBLE
410 #define SI_NOINFO 0 /* No signal info besides si_signo. */
411 #define SI_USER 0x10001 /* Signal sent by kill(). */
412 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */
413 #define SI_TIMER 0x10003 /* Signal generated by expiration of */
414 /* a timer set by timer_settime(). */
415 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */
416 /* an asynchronous I/O request.*/
417 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */
418 /* message on an empty message queue. */
419 #define SI_KERNEL 0x10006
420 #define SI_LWP 0x10007 /* Signal sent by thr_kill */
423 #define SI_UNDEFINED 0
427 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
428 typedef void __siginfohandler_t(int, struct __siginfo *, void *);
433 #define __stack_t sigaltstack
435 typedef struct __stack_t stack_t;
437 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */
438 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
439 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */
440 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
444 * Structure used in sigaltstack call. Its definition is always
445 * needed for __ucontext. If __BSD_VISIBLE is defined, the structure
446 * tag is actually sigaltstack.
449 void *ss_sp; /* signal stack base */
450 __size_t ss_size; /* signal stack length */
451 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
457 * Signal vector "template" used in sigvec call.
460 __sighandler_t *sv_handler; /* signal handler */
461 int sv_mask; /* signal mask to apply */
462 int sv_flags; /* see signal options below */
465 #define SV_ONSTACK SA_ONSTACK
466 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
467 #define SV_RESETHAND SA_RESETHAND
468 #define SV_NODEFER SA_NODEFER
469 #define SV_NOCLDSTOP SA_NOCLDSTOP
470 #define SV_SIGINFO SA_SIGINFO
471 #define sv_onstack sv_flags /* isn't compatibility wonderful! */
474 /* Keep this in one place only */
475 #if defined(_KERNEL) && defined(COMPAT_43) && \
484 * Structure used in sigstack call.
487 void *ss_sp; /* signal stack pointer */
488 int ss_onstack; /* current status */
492 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112
494 * Macro for converting signal number to a mask suitable for
497 #define sigmask(m) (1 << ((m)-1))
501 #define BADSIG SIG_ERR
504 #if __POSIX_VISIBLE || __XSI_VISIBLE
506 * Flags for sigprocmask:
508 #define SIG_BLOCK 1 /* block specified signal set */
509 #define SIG_UNBLOCK 2 /* unblock specified signal set */
510 #define SIG_SETMASK 3 /* set specified signal set */
514 * For historical reasons; programs expect signal's return value to be
515 * defined by <sys/signal.h>.
518 __sighandler_t *signal(int, __sighandler_t *);
521 #endif /* !_SYS_SIGNAL_H_ */