1/* sys/signal.h */
2
3#ifndef _SYS_SIGNAL_H
4#define _SYS_SIGNAL_H
5#ifdef __cplusplus
6extern "C" {
7#endif
8
9#include "_ansi.h"
10#include <sys/features.h>
11#include <sys/types.h>
12
13/* #ifndef __STRICT_ANSI__*/
14
15/* Cygwin defines it's own sigset_t in include/cygwin/signal.h */
16#ifndef __CYGWIN__
17typedef unsigned long sigset_t;
18#endif
19
20#if defined(__rtems__) || defined (__native_client__)
21
22#if defined(_POSIX_REALTIME_SIGNALS)
23
24/* sigev_notify values
25   NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */
26
27#define SIGEV_NONE   1  /* No asynchronous notification shall be delivered */
28                        /*   when the event of interest occurs. */
29#define SIGEV_SIGNAL 2  /* A queued signal, with an application defined */
30                        /*  value, shall be delivered when the event of */
31                        /*  interest occurs. */
32#define SIGEV_THREAD 3  /* A notification function shall be called to */
33                        /*   perform notification. */
34
35/*  Signal Generation and Delivery, P1003.1b-1993, p. 63
36    NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
37          sigev_notify_attributes to the sigevent structure.  */
38
39union sigval {
40  int    sival_int;    /* Integer signal value */
41  void  *sival_ptr;    /* Pointer signal value */
42};
43
44struct sigevent {
45  int              sigev_notify;               /* Notification type */
46  int              sigev_signo;                /* Signal number */
47  union sigval     sigev_value;                /* Signal value */
48
49#if defined(_POSIX_THREADS)
50  void           (*sigev_notify_function)( union sigval );
51                                               /* Notification function */
52  pthread_attr_t  *sigev_notify_attributes;    /* Notification Attributes */
53#endif
54};
55
56/* Signal Actions, P1003.1b-1993, p. 64 */
57/* si_code values, p. 66 */
58
59#define SI_USER    1    /* Sent by a user. kill(), abort(), etc */
60#define SI_QUEUE   2    /* Sent by sigqueue() */
61#define SI_TIMER   3    /* Sent by expiration of a timer_settime() timer */
62#define SI_ASYNCIO 4    /* Indicates completion of asycnhronous IO */
63#define SI_MESGQ   5    /* Indicates arrival of a message at an empty queue */
64
65typedef struct {
66  int          si_signo;    /* Signal number */
67  int          si_code;     /* Cause of the signal */
68  union sigval si_value;    /* Signal value */
69} siginfo_t;
70#endif
71
72/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
73
74#define SA_NOCLDSTOP 1   /* Do not generate SIGCHLD when children stop */
75#define SA_SIGINFO   2   /* Invoke the signal catching function with */
76                         /*   three arguments instead of one. */
77
78/* struct sigaction notes from POSIX:
79 *
80 *  (1) Routines stored in sa_handler should take a single int as
81 *      their argument although the POSIX standard does not require this.
82 *      This is not longer true since at least POSIX.1-2008
83 *  (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
84 *      application should not use both simultaneously.
85 */
86
87typedef void (*_sig_func_ptr)(int);
88
89struct sigaction {
90  int         sa_flags;       /* Special flags to affect behavior of signal */
91  sigset_t    sa_mask;        /* Additional set of signals to be blocked */
92                              /*   during execution of signal-catching */
93                              /*   function. */
94  union {
95    _sig_func_ptr _handler;  /* SIG_DFL, SIG_IGN, or pointer to a function */
96#if defined(_POSIX_REALTIME_SIGNALS)
97    void      (*_sigaction)( int, siginfo_t *, void * );
98#endif
99  } _signal_handlers;
100};
101
102#define sa_handler    _signal_handlers._handler
103#if defined(_POSIX_REALTIME_SIGNALS)
104#define sa_sigaction  _signal_handlers._sigaction
105#endif
106
107#elif defined(__CYGWIN__)
108#include <cygwin/signal.h>
109#else
110#define SA_NOCLDSTOP 1  /* only value supported now for sa_flags */
111
112typedef void (*_sig_func_ptr)(int);
113
114struct sigaction
115{
116	_sig_func_ptr sa_handler;
117	sigset_t sa_mask;
118	int sa_flags;
119};
120#endif /* defined(__rtems__) || defined(__native_client__) */
121
122#define SIG_SETMASK 0	/* set mask with sigprocmask() */
123#define SIG_BLOCK 1	/* set of signals to block */
124#define SIG_UNBLOCK 2	/* set of signals to, well, unblock */
125
126/* These depend upon the type of sigset_t, which right now
127   is always a long.. They're in the POSIX namespace, but
128   are not ANSI. */
129#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
130#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
131#define sigemptyset(what)   (*(what) = 0, 0)
132#define sigfillset(what)    (*(what) = ~(0), 0)
133#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
134
135int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));
136
137#if defined(_POSIX_THREADS)
138int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
139#endif
140
141/* protos for functions found in winsup sources for CYGWIN */
142#if defined(__CYGWIN__) || defined(__rtems__) || defined(__native_client__)
143#undef sigaddset
144#undef sigdelset
145#undef sigemptyset
146#undef sigfillset
147#undef sigismember
148
149#ifdef _COMPILING_NEWLIB
150int _EXFUN(_kill, (pid_t, int));
151#endif
152int _EXFUN(kill, (pid_t, int));
153int _EXFUN(killpg, (pid_t, int));
154int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
155int _EXFUN(sigaddset, (sigset_t *, const int));
156int _EXFUN(sigdelset, (sigset_t *, const int));
157int _EXFUN(sigismember, (const sigset_t *, int));
158int _EXFUN(sigfillset, (sigset_t *));
159int _EXFUN(sigemptyset, (sigset_t *));
160int _EXFUN(sigpending, (sigset_t *));
161int _EXFUN(sigsuspend, (const sigset_t *));
162int _EXFUN(sigpause, (int));
163
164#if defined(_POSIX_THREADS) && !defined(__native_client__)
165#ifdef __CYGWIN__
166#  ifndef _CYGWIN_TYPES_H
167#    error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib.
168#  endif
169#endif
170int _EXFUN(pthread_kill, (pthread_t thread, int sig));
171#endif
172
173#if defined(_POSIX_REALTIME_SIGNALS)
174
175/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
176    NOTE: P1003.1c/D10, p. 39 adds sigwait().  */
177
178int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));
179int _EXFUN(sigtimedwait,
180  (const sigset_t *set, siginfo_t *info, const struct timespec  *timeout)
181);
182int _EXFUN(sigwait, (const sigset_t *set, int *sig));
183
184/*  3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
185int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
186
187#endif /* defined(_POSIX_REALTIME_SIGNALS) */
188
189#endif /* defined(__CYGWIN__) || defined(__rtems__) */
190
191/* #endif __STRICT_ANSI__ */
192
193#if defined(___AM29K__)
194/* These all need to be defined for ANSI C, but I don't think they are
195   meaningful.  */
196#define SIGABRT 1
197#define SIGFPE 1
198#define SIGILL 1
199#define SIGINT 1
200#define SIGSEGV 1
201#define SIGTERM 1
202/* These need to be defined for POSIX, and some others do too.  */
203#define SIGHUP 1
204#define SIGQUIT 1
205#define NSIG 2
206#elif defined(__GO32__)
207#define SIGINT  1
208#define SIGKILL 2
209#define SIGPIPE 3
210#define SIGFPE  4
211#define SIGHUP  5
212#define SIGTERM 6
213#define SIGSEGV 7
214#define SIGTSTP 8
215#define SIGQUIT 9
216#define SIGTRAP 10
217#define SIGILL  11
218#define SIGEMT  12
219#define SIGALRM 13
220#define SIGBUS  14
221#define SIGLOST 15
222#define SIGSTOP 16
223#define SIGABRT 17
224#define SIGUSR1	18
225#define SIGUSR2	19
226#define NSIG    20
227#elif !defined(SIGTRAP)
228#define	SIGHUP	1	/* hangup */
229#define	SIGINT	2	/* interrupt */
230#define	SIGQUIT	3	/* quit */
231#define	SIGILL	4	/* illegal instruction (not reset when caught) */
232#define	SIGTRAP	5	/* trace trap (not reset when caught) */
233#define	SIGIOT	6	/* IOT instruction */
234#define	SIGABRT 6	/* used by abort, replace SIGIOT in the future */
235#define	SIGEMT	7	/* EMT instruction */
236#define	SIGFPE	8	/* floating point exception */
237#define	SIGKILL	9	/* kill (cannot be caught or ignored) */
238#define	SIGBUS	10	/* bus error */
239#define	SIGSEGV	11	/* segmentation violation */
240#define	SIGSYS	12	/* bad argument to system call */
241#define	SIGPIPE	13	/* write on a pipe with no one to read it */
242#define	SIGALRM	14	/* alarm clock */
243#define	SIGTERM	15	/* software termination signal from kill */
244
245#if defined(__rtems__)
246#define	SIGURG	16	/* urgent condition on IO channel */
247#define	SIGSTOP	17	/* sendable stop signal not from tty */
248#define	SIGTSTP	18	/* stop signal from tty */
249#define	SIGCONT	19	/* continue a stopped process */
250#define	SIGCHLD	20	/* to parent on child stop or exit */
251#define	SIGCLD	20	/* System V name for SIGCHLD */
252#define	SIGTTIN	21	/* to readers pgrp upon background tty read */
253#define	SIGTTOU	22	/* like TTIN for output if (tp->t_local&LTOSTOP) */
254#define	SIGIO	23	/* input/output possible signal */
255#define	SIGPOLL	SIGIO	/* System V name for SIGIO */
256#define	SIGWINCH 24	/* window changed */
257#define	SIGUSR1 25	/* user defined signal 1 */
258#define	SIGUSR2 26	/* user defined signal 2 */
259
260/* Real-Time Signals Range, P1003.1b-1993, p. 61
261   NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX
262         (which is a minimum of 8) signals.
263 */
264#define SIGRTMIN 27
265#define SIGRTMAX 31
266#define __SIGFIRSTNOTRT SIGHUP
267#define __SIGLASTNOTRT  SIGUSR2
268
269#define NSIG	32      /* signal 0 implied */
270
271#elif defined(__svr4__)
272/* svr4 specifics. different signals above 15, and sigaction. */
273#define	SIGUSR1	16
274#define SIGUSR2	17
275#define SIGCLD	18
276#define	SIGPWR	19
277#define SIGWINCH 20
278#define	SIGPOLL	22	/* 20 for x.out binaries!!!! */
279#define	SIGSTOP	23	/* sendable stop signal not from tty */
280#define	SIGTSTP	24	/* stop signal from tty */
281#define	SIGCONT	25	/* continue a stopped process */
282#define	SIGTTIN	26	/* to readers pgrp upon background tty read */
283#define	SIGTTOU	27	/* like TTIN for output if (tp->t_local&LTOSTOP) */
284#define NSIG	28
285#else
286#define	SIGURG	16	/* urgent condition on IO channel */
287#define	SIGSTOP	17	/* sendable stop signal not from tty */
288#define	SIGTSTP	18	/* stop signal from tty */
289#define	SIGCONT	19	/* continue a stopped process */
290#define	SIGCHLD	20	/* to parent on child stop or exit */
291#define	SIGCLD	20	/* System V name for SIGCHLD */
292#define	SIGTTIN	21	/* to readers pgrp upon background tty read */
293#define	SIGTTOU	22	/* like TTIN for output if (tp->t_local&LTOSTOP) */
294#define	SIGIO	23	/* input/output possible signal */
295#define	SIGPOLL	SIGIO	/* System V name for SIGIO */
296#define	SIGXCPU	24	/* exceeded CPU time limit */
297#define	SIGXFSZ	25	/* exceeded file size limit */
298#define	SIGVTALRM 26	/* virtual time alarm */
299#define	SIGPROF	27	/* profiling time alarm */
300#define	SIGWINCH 28	/* window changed */
301#define	SIGLOST 29	/* resource lost (eg, record-lock lost) */
302#define	SIGUSR1 30	/* user defined signal 1 */
303#define	SIGUSR2 31	/* user defined signal 2 */
304#define NSIG	32      /* signal 0 implied */
305#endif
306#endif
307
308#ifdef __cplusplus
309}
310#endif
311
312#ifndef _SIGNAL_H_
313/* Some applications take advantage of the fact that <sys/signal.h>
314 * and <signal.h> are equivalent in glibc.  Allow for that here.  */
315#include <signal.h>
316#endif
317#endif /* _SYS_SIGNAL_H */
318