389 lines
12 KiB
C
389 lines
12 KiB
C
/* sys/signal.h */
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#ifndef _SYS_SIGNAL_H
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#define _SYS_SIGNAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "_ansi.h"
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#include <sys/cdefs.h>
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#include <sys/features.h>
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#include <sys/types.h>
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#include <sys/_sigset.h>
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#include <sys/_timespec.h>
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#include <stdint.h>
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#if !defined(_SIGSET_T_DECLARED)
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#define _SIGSET_T_DECLARED
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typedef __sigset_t sigset_t;
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#endif
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#if defined(__CYGWIN__)
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#include <cygwin/signal.h>
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#else
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#if defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309
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/* sigev_notify values
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NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */
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#define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */
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/* when the event of interest occurs. */
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#define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */
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/* value, shall be delivered when the event of */
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/* interest occurs. */
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#define SIGEV_THREAD 3 /* A notification function shall be called to */
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/* perform notification. */
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/* Signal Generation and Delivery, P1003.1b-1993, p. 63
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NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and
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sigev_notify_attributes to the sigevent structure. */
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union sigval {
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int sival_int; /* Integer signal value */
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void *sival_ptr; /* Pointer signal value */
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};
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struct sigevent {
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int sigev_notify; /* Notification type */
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int sigev_signo; /* Signal number */
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union sigval sigev_value; /* Signal value */
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#if defined(_POSIX_THREADS)
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void (*sigev_notify_function)( union sigval );
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/* Notification function */
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pthread_attr_t *sigev_notify_attributes; /* Notification Attributes */
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#endif
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};
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/* Signal Actions, P1003.1b-1993, p. 64 */
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/* si_code values, p. 66 */
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#define SI_USER 1 /* Sent by a user. kill(), abort(), etc */
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#define SI_QUEUE 2 /* Sent by sigqueue() */
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#define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */
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#define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */
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#define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */
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typedef struct {
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int si_signo; /* Signal number */
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int si_code; /* Cause of the signal */
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union sigval si_value; /* Signal value */
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} siginfo_t;
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#endif /* defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 */
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#if defined(__rtems__)
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
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#define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */
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#define SA_SIGINFO 0x2 /* Invoke the signal catching function with */
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/* three arguments instead of one. */
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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#define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */
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#endif
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/* struct sigaction notes from POSIX:
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*
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* (1) Routines stored in sa_handler should take a single int as
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* their argument although the POSIX standard does not require this.
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* This is not longer true since at least POSIX.1-2008
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* (2) The fields sa_handler and sa_sigaction may overlap, and a conforming
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* application should not use both simultaneously.
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*/
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typedef void (*_sig_func_ptr)(int);
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struct sigaction {
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int sa_flags; /* Special flags to affect behavior of signal */
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sigset_t sa_mask; /* Additional set of signals to be blocked */
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/* during execution of signal-catching */
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/* function. */
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union {
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_sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */
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#if defined(_POSIX_REALTIME_SIGNALS)
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void (*_sigaction)( int, siginfo_t *, void * );
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#endif
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} _signal_handlers;
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};
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#define sa_handler _signal_handlers._handler
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#if defined(_POSIX_REALTIME_SIGNALS)
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#define sa_sigaction _signal_handlers._sigaction
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#endif
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#else /* defined(__rtems__) */
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#define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */
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typedef void (*_sig_func_ptr)(int);
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struct sigaction
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{
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_sig_func_ptr sa_handler;
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sigset_t sa_mask;
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int sa_flags;
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};
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#endif /* defined(__rtems__) */
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#endif /* defined(__CYGWIN__) */
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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/*
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* Minimum and default signal stack constants. Allow for target overrides
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* from <sys/features.h>.
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*/
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#ifndef MINSIGSTKSZ
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#define MINSIGSTKSZ 2048
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#endif
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#ifndef SIGSTKSZ
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#define SIGSTKSZ 8192
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#endif
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/*
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* Possible values for ss_flags in stack_t below.
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*/
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#define SS_ONSTACK 0x1
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#define SS_DISABLE 0x2
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#endif
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/*
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* Structure used in sigaltstack call.
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*/
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typedef struct sigaltstack {
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void *ss_sp; /* Stack base or pointer. */
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int ss_flags; /* Flags. */
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size_t ss_size; /* Stack size. */
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} stack_t;
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#if __POSIX_VISIBLE
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#define SIG_SETMASK 0 /* set mask with sigprocmask() */
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#define SIG_BLOCK 1 /* set of signals to block */
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#define SIG_UNBLOCK 2 /* set of signals to, well, unblock */
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int sigprocmask (int, const sigset_t *, sigset_t *);
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#endif
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#if __POSIX_VISIBLE >= 199506
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int pthread_sigmask (int, const sigset_t *, sigset_t *);
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#endif
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#ifdef _LIBC
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int _kill (pid_t, int);
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#endif /* _LIBC */
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#if __POSIX_VISIBLE
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int kill (pid_t, int);
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#endif
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4
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int killpg (pid_t, int);
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#endif
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#if __POSIX_VISIBLE
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int sigaction (int, const struct sigaction *, struct sigaction *);
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int sigaddset (sigset_t *, const int);
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int sigdelset (sigset_t *, const int);
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int sigismember (const sigset_t *, int);
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int sigfillset (sigset_t *);
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int sigemptyset (sigset_t *);
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int sigpending (sigset_t *);
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int sigsuspend (const sigset_t *);
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int sigwait (const sigset_t *, int *);
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#if !defined(__CYGWIN__) && !defined(__rtems__)
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/* These depend upon the type of sigset_t, which right now
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is always a long.. They're in the POSIX namespace, but
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are not ANSI. */
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#define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0)
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#define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0)
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#define sigemptyset(what) (*(what) = 0, 0)
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#define sigfillset(what) (*(what) = ~(0), 0)
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#define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0)
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#endif /* !__CYGWIN__ && !__rtems__ */
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#endif /* __POSIX_VISIBLE */
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/* There are two common sigpause variants, both of which take an int argument.
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If you request _XOPEN_SOURCE or _GNU_SOURCE, you get the System V version,
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which removes the given signal from the process's signal mask; otherwise
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you get the BSD version, which sets the process's signal mask to the given
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value. */
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#if __XSI_VISIBLE && !defined(__INSIDE_CYGWIN__)
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# ifdef __GNUC__
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int sigpause (int) __asm__ (__ASMNAME ("__xpg_sigpause"));
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# else
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int __xpg_sigpause (int);
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# define sigpause __xpg_sigpause
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# endif
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#elif __BSD_VISIBLE
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int sigpause (int);
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#endif
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#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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int sigaltstack (const stack_t *__restrict, stack_t *__restrict);
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#endif
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#if __POSIX_VISIBLE >= 199506
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int pthread_kill (pthread_t, int);
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#endif
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#if __POSIX_VISIBLE >= 199309
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76
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NOTE: P1003.1c/D10, p. 39 adds sigwait(). */
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int sigwaitinfo (const sigset_t *, siginfo_t *);
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int sigtimedwait (const sigset_t *, siginfo_t *, const struct timespec *);
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/* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
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int sigqueue (pid_t, int, const union sigval);
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#endif /* __POSIX_VISIBLE >= 199309 */
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/* Using __MISC_VISIBLE until POSIX Issue 8 is officially released */
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#if __MISC_VISIBLE
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/* POSIX Issue 8 adds sig2str() and str2sig() */
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#if __SIZEOF_INT__ >= 4
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#define SIG2STR_MAX (sizeof("RTMAX+") + sizeof("4294967295") - 1)
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#else
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#define SIG2STR_MAX (sizeof("RTMAX+") + sizeof("65535") - 1)
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#endif
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int sig2str(int, char *);
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int str2sig(const char *__restrict, int *__restrict);
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#endif /* __MISC_VISIBLE */
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#if defined(___AM29K__)
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/* These all need to be defined for ANSI C, but I don't think they are
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meaningful. */
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#define SIGABRT 1
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#define SIGFPE 1
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#define SIGILL 1
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#define SIGINT 1
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#define SIGSEGV 1
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#define SIGTERM 1
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/* These need to be defined for POSIX, and some others do too. */
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#define SIGHUP 1
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#define SIGQUIT 1
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#define NSIG 2
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#elif defined(__GO32__)
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#define SIGINT 1
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#define SIGKILL 2
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#define SIGPIPE 3
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#define SIGFPE 4
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#define SIGHUP 5
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#define SIGTERM 6
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#define SIGSEGV 7
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#define SIGTSTP 8
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#define SIGQUIT 9
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#define SIGTRAP 10
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#define SIGILL 11
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#define SIGEMT 12
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#define SIGALRM 13
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#define SIGBUS 14
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#define SIGLOST 15
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#define SIGSTOP 16
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#define SIGABRT 17
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#define SIGUSR1 18
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#define SIGUSR2 19
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#define NSIG 20
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#elif !defined(SIGTRAP)
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* quit */
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#define SIGILL 4 /* illegal instruction (not reset when caught) */
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#define SIGIOT 6 /* IOT instruction */
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#define SIGABRT 6 /* used by abort, replace SIGIOT in the future */
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#define SIGEMT 7 /* EMT instruction */
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill (cannot be caught or ignored) */
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#define SIGBUS 10 /* bus error */
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#define SIGSEGV 11 /* segmentation violation */
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#define SIGSYS 12 /* bad argument to system call */
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#define SIGPIPE 13 /* write on a pipe with no one to read it */
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#define SIGALRM 14 /* alarm clock */
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#define SIGTERM 15 /* software termination signal from kill */
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#if defined(__rtems__)
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGCLD 20 /* System V name for SIGCHLD */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define SIGIO 23 /* input/output possible signal */
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#define SIGPOLL SIGIO /* System V name for SIGIO */
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#define SIGWINCH 24 /* window changed */
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#define SIGUSR1 25 /* user defined signal 1 */
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#define SIGUSR2 26 /* user defined signal 2 */
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/* Real-Time Signals Range, P1003.1b-1993, p. 61
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NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX
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(which is a minimum of 8) signals.
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*/
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#define SIGRTMIN 27
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#define SIGRTMAX 31
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#define __SIGFIRSTNOTRT SIGHUP
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#define __SIGLASTNOTRT SIGUSR2
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#define NSIG 32 /* signal 0 implied */
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#elif defined(__svr4__)
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/* svr4 specifics. different signals above 15, and sigaction. */
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#define SIGUSR1 16
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#define SIGUSR2 17
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#define SIGCLD 18
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#define SIGPWR 19
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#define SIGWINCH 20
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#define SIGPOLL 22 /* 20 for x.out binaries!!!! */
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#define SIGSTOP 23 /* sendable stop signal not from tty */
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#define SIGTSTP 24 /* stop signal from tty */
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#define SIGCONT 25 /* continue a stopped process */
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#define SIGTTIN 26 /* to readers pgrp upon background tty read */
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#define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define NSIG 28
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#else
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGCLD 20 /* System V name for SIGCHLD */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#define SIGIO 23 /* input/output possible signal */
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#define SIGPOLL SIGIO /* System V name for SIGIO */
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#define SIGXCPU 24 /* exceeded CPU time limit */
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#define SIGXFSZ 25 /* exceeded file size limit */
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#define SIGVTALRM 26 /* virtual time alarm */
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#define SIGPROF 27 /* profiling time alarm */
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#define SIGWINCH 28 /* window changed */
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#define SIGLOST 29 /* resource lost (eg, record-lock lost) */
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#define SIGUSR1 30 /* user defined signal 1 */
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#define SIGUSR2 31 /* user defined signal 2 */
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#define NSIG 32 /* signal 0 implied */
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#if defined(__CYGWIN__)
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#if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
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#include <sys/ucontext.h>
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#endif
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#endif
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#ifndef _SIGNAL_H_
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/* Some applications take advantage of the fact that <sys/signal.h>
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* and <signal.h> are equivalent in glibc. Allow for that here. */
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#include <signal.h>
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#endif
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#endif /* _SYS_SIGNAL_H */
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