214 lines
7.4 KiB
C
214 lines
7.4 KiB
C
#ifndef _SYS_SIGNAL_H_
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#define _SYS_SIGNAL_H_
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#include <sys/featuretest.h>
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#include <sys/sigtypes.h>
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#ifdef _SYSTEM
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#define _NSIG 31
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#else
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#define _NSIG 27
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#endif
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#if defined(_NETBSD_SOURCE)
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#define NSIG _NSIG
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#endif /* _NETBSD_SOURCE */
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/* Regular signals. */
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt (DEL) */
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#define SIGQUIT 3 /* quit (ASCII FS) */
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#define SIGILL 4 /* illegal instruction */
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#define SIGABRT 6 /* IOT instruction */
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#define SIGBUS 7 /* bus error */
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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 SIGUSR1 10 /* user defined signal # 1 */
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#define SIGSEGV 11 /* segmentation violation */
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#define SIGUSR2 12 /* user defined signal # 2 */
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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 SIGEMT 16 /* EMT instruction */
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#define SIGCHLD 17 /* child process terminated or stopped */
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#define SIGWINCH 21 /* window size has changed */
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#define SIGVTALRM 24 /* virtual alarm */
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#define SIGPROF 25 /* profiler alarm */
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/* POSIX requires the following signals to be defined, even if they are
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* not supported. Here are the definitions, but they are not supported.
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*/
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#define SIGCONT 18 /* continue if stopped */
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#define SIGSTOP 19 /* stop signal */
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#define SIGTSTP 20 /* interactive stop signal */
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#define SIGTTIN 22 /* background process wants to read */
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#define SIGTTOU 23 /* background process wants to write */
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#ifdef _MINIX
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#define SIGIOT SIGABRT /* for people who speak PDP-11 */
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/* MINIX specific signals. These signals are not used by user proceses,
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* but meant to inform system processes, like the PM, about system events.
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* The order here determines the order signals are processed by system
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* processes in user-space. Higher-priority signals should be first.
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*/
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/* Signals delivered by a signal manager. */
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#define SIGSNDELAY 26 /* end of delay for signal delivery */
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#define SIGS_FIRST SIGHUP /* first system signal */
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#define SIGS_LAST SIGSNDELAY /* last system signal */
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#define IS_SIGS(signo) (signo>=SIGS_FIRST && signo<=SIGS_LAST)
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/* Signals delivered by the kernel. */
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#define SIGKMEM 27 /* kernel memory request pending */
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#define SIGKMESS 28 /* new kernel message */
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#define SIGKSIGSM 29 /* kernel signal pending for signal manager */
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#define SIGKSIG 30 /* kernel signal pending */
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#define SIGK_FIRST SIGKMEM /* first kernel signal */
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#define SIGK_LAST SIGKSIG /* last kernel signal */
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#define IS_SIGK(signo) (signo>=SIGK_FIRST && signo<=SIGK_LAST)
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/* Termination signals for Minix system processes. */
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#define SIGS_IS_LETHAL(sig) \
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(sig == SIGILL || sig == SIGBUS || sig == SIGFPE || sig == SIGSEGV \
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|| sig == SIGEMT || sig == SIGABRT)
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#define SIGS_IS_TERMINATION(sig) (SIGS_IS_LETHAL(sig) \
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|| (sig == SIGKILL || sig == SIGPIPE))
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#define SIGS_IS_STACKTRACE(sig) (SIGS_IS_LETHAL(sig) && sig != SIGABRT)
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#endif
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#include <sys/cdefs.h>
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typedef void (*__sighandler_t)(int);
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/* Macros used as function pointers. */
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#define SIG_ERR ((__sighandler_t) -1) /* error return */
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#define SIG_DFL ((__sighandler_t) 0) /* default signal handling */
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#define SIG_IGN ((__sighandler_t) 1) /* ignore signal */
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#define SIG_HOLD ((__sighandler_t) 2) /* block signal */
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#define SIG_CATCH ((__sighandler_t) 3) /* catch signal */
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#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
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defined(_NETBSD_SOURCE)
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#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
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defined(_NETBSD_SOURCE)
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#include <sys/siginfo.h>
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#endif
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#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
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(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
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#include <sys/ucontext.h>
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#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
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/*
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* Signal vector "template" used in sigaction call.
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*/
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struct sigaction {
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union {
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void (*_sa_handler)(int);
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#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
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defined(_NETBSD_SOURCE)
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void (*_sa_sigaction)(int, siginfo_t *, void *);
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#endif
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} _sa_u; /* signal handler */
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sigset_t sa_mask; /* signal mask to apply */
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int sa_flags; /* see signal options below */
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};
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#define sa_handler _sa_u._sa_handler
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#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
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defined(_NETBSD_SOURCE)
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#define sa_sigaction _sa_u._sa_sigaction
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#endif
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#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
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/* Fields for sa_flags. */
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#define SA_ONSTACK 0x0001 /* deliver signal on alternate stack */
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#define SA_RESETHAND 0x0002 /* reset signal handler when signal caught */
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#define SA_NODEFER 0x0004 /* don't block signal while catching it */
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#define SA_RESTART 0x0008 /* automatic system call restart */
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#define SA_SIGINFO 0x0010 /* extended signal handling */
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#define SA_NOCLDWAIT 0x0020 /* don't create zombies */
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#define SA_NOCLDSTOP 0x0040 /* don't receive SIGCHLD when child stops */
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/* POSIX requires these values for use with sigprocmask(2). */
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#define SIG_BLOCK 0 /* for blocking signals */
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#define SIG_UNBLOCK 1 /* for unblocking signals */
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#define SIG_SETMASK 2 /* for setting the signal mask */
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#define SIG_INQUIRE 4 /* for internal use only */
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#if defined(_NETBSD_SOURCE)
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typedef void (*sig_t)(int); /* type of signal function */
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#endif
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#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
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(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
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/*
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* Flags used with stack_t/struct sigaltstack.
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*/
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#define SS_ONSTACK 1 /* Process is executing on an alternate stack */
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#define SS_DISABLE 2 /* Alternate stack is disabled */
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#define MINSIGSTKSZ 2048 /* Minimal stack size is 2k */
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#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
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#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
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#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
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(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
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/*
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* Structure used in sigstack call.
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*/
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struct sigstack {
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void *ss_sp; /* signal stack pointer */
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int ss_onstack; /* current status */
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};
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#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
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#if defined(_NETBSD_SOURCE) && !defined(_KERNEL)
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/*
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* Macro for converting signal number to a mask suitable for
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* sigblock().
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*/
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#define sigmask(n) __sigmask(n)
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#define BADSIG SIG_ERR
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#endif /* _NETBSD_SOURCE */
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#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
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defined(_NETBSD_SOURCE)
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struct sigevent {
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int sigev_notify;
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int sigev_signo;
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union sigval sigev_value;
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void (*sigev_notify_function)(union sigval);
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void /* pthread_attr_t */ *sigev_notify_attributes;
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};
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#define SIGEV_NONE 0
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#define SIGEV_SIGNAL 1
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#define SIGEV_THREAD 2
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#if defined(_NETBSD_SOURCE)
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#define SIGEV_SA 3
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#endif
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#endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */
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#endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
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/*
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* For historical reasons; programs expect signal's return value to be
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* defined by <sys/signal.h>.
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*/
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__BEGIN_DECLS
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void (*signal(int, void (*)(int)))(int);
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__END_DECLS
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#endif /* !_SYS_SIGNAL_H_ */
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