326 lines
11 KiB
C
326 lines
11 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/features.h>
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/* #ifndef __STRICT_ANSI__*/
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#if defined(_POSIX_THREADS)
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#include <sys/types.h> /* for pthread data types */
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#endif
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typedef unsigned long sigset_t;
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#if defined(__rtems__)
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#if defined(_POSIX_REALTIME_SIGNALS)
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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
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/* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */
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#define SA_NOCLDSTOP 1 /* Do not generate SIGCHLD when children stop */
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#define SA_SIGINFO 2 /* Invoke the signal catching function with */
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/* three arguments instead of one. */
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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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* there argument although the POSIX standard does not require this.
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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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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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void (*_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
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struct sigaction
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{
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void (*sa_handler)(int);
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sigset_t sa_mask;
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int sa_flags;
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};
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#define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */
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#endif /* defined(__rtems__) */
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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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/* 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)))
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#define sigemptyset(what) (*(what) = 0)
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int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));
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#if defined(_POSIX_THREADS)
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int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));
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#endif
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/* protos for functions found in winsup sources for CYGWIN */
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#if defined(__CYGWIN__) || defined(__rtems__)
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#undef sigaddset
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#undef sigemptyset
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/* The first argument to kill should be pid_t. Right now
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<sys/types.h> always defines pid_t to be int. If that ever
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changes, then we will need to do something else, perhaps along the
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lines of <machine/types.h>. */
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int _EXFUN(kill, (int, int));
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int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
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int _EXFUN(sigaddset, (sigset_t *, const int));
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int _EXFUN(sigdelset, (sigset_t *, const int));
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int _EXFUN(sigismember, (const sigset_t *, int));
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int _EXFUN(sigfillset, (sigset_t *));
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int _EXFUN(sigemptyset, (sigset_t *));
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int _EXFUN(sigpending, (sigset_t *));
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int _EXFUN(sigsuspend, (const sigset_t *));
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int _EXFUN(sigpause, (int));
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#if defined(_POSIX_THREADS)
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int _EXFUN(pthread_kill, (pthread_t thread, int sig));
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#endif
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#if defined(_POSIX_REALTIME_SIGNALS)
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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 _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));
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int _EXFUN(sigtimedwait,
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(const sigset_t *set, siginfo_t *info, const struct timespec *timeout)
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);
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int _EXFUN(sigwait, (const sigset_t *set, int *sig));
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/* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */
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int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
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#endif /* defined(_POSIX_REALTIME_SIGNALS) */
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#endif /* defined(__CYGWIN32__) || defined(__rtems__) */
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/* #endif __STRICT_ANSI__ */
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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(__CYGWIN__) /* BSD signals semantics */
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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 SIGABRT 6 /* used by abort */
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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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#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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#else
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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 SIGUSR1 16 /* reserved as application defined signal 1 */
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#define SIGUSR2 17 /* reserved as application defined signal 2 */
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#define __SIGFIRSTNOTRT SIGHUP
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#define __SIGLASTNOTRT SIGUSR2
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/* RTEMS does not support job control, hence no Job Control Signals are
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defined per P1003.1b-1993, p. 60-61.
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RTEMS does not support memory protection, hence no Memory Protection
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Signals are defined per P1003.1b-1993, p. 60-61. */
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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 18
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#define SIGRTMAX 32
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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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#endif /* _SYS_SIGNAL_H */
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