minix/include/sys/signal.h

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#ifndef _SYS_SIGNAL_H_
#define _SYS_SIGNAL_H_
#include <sys/featuretest.h>
#include <sys/sigtypes.h>
#define _NSIG 26
#define NSIG _NSIG
/* Regular signals. */
#define SIGHUP 1 /* hangup */
#define SIGINT 2 /* interrupt (DEL) */
#define SIGQUIT 3 /* quit (ASCII FS) */
#define SIGILL 4 /* illegal instruction */
#define SIGTRAP 5 /* trace trap (not reset when caught) */
#define SIGABRT 6 /* IOT instruction */
#define SIGBUS 7 /* bus error */
#define SIGFPE 8 /* floating point exception */
#define SIGKILL 9 /* kill (cannot be caught or ignored) */
#define SIGUSR1 10 /* user defined signal # 1 */
#define SIGSEGV 11 /* segmentation violation */
#define SIGUSR2 12 /* user defined signal # 2 */
#define SIGPIPE 13 /* write on a pipe with no one to read it */
#define SIGALRM 14 /* alarm clock */
#define SIGTERM 15 /* software termination signal from kill */
#define SIGEMT 16 /* EMT instruction */
#define SIGCHLD 17 /* child process terminated or stopped */
#define SIGWINCH 21 /* window size has changed */
#define SIGVTALRM 24 /* virtual alarm */
#define SIGPROF 25 /* profiler alarm */
/* POSIX requires the following signals to be defined, even if they are
* not supported. Here are the definitions, but they are not supported.
*/
#define SIGCONT 18 /* continue if stopped */
#define SIGSTOP 19 /* stop signal */
#define SIGTSTP 20 /* interactive stop signal */
#define SIGTTIN 22 /* background process wants to read */
#define SIGTTOU 23 /* background process wants to write */
#ifdef _MINIX
#define SIGIOT SIGABRT /* for people who speak PDP-11 */
/* MINIX specific signals. These signals are not used by user proceses,
* but meant to inform system processes, like the PM, about system events.
* The order here determines the order signals are processed by system
* processes in user-space. Higher-priority signals should be first.
*/
/* Signals delivered by a signal manager. */
#define SIGSNDELAY 26 /* end of delay for signal delivery */
#define SIGS_FIRST SIGHUP /* first system signal */
#define SIGS_LAST SIGSNDELAY /* last system signal */
#define IS_SIGS(signo) (signo>=SIGS_FIRST && signo<=SIGS_LAST)
/* Signals delivered by the kernel. */
#define SIGKMEM 27 /* kernel memory request pending */
#define SIGKMESS 28 /* new kernel message */
#define SIGKSIGSM 29 /* kernel signal pending for signal manager */
#define SIGKSIG 30 /* kernel signal pending */
#define SIGK_FIRST SIGKMEM /* first kernel signal */
#define SIGK_LAST SIGKSIG /* last kernel signal */
#define IS_SIGK(signo) (signo>=SIGK_FIRST && signo<=SIGK_LAST)
/* Termination signals for Minix system processes. */
#define SIGS_IS_LETHAL(sig) \
(sig == SIGILL || sig == SIGBUS || sig == SIGFPE || sig == SIGSEGV \
|| sig == SIGEMT || sig == SIGABRT)
#define SIGS_IS_TERMINATION(sig) (SIGS_IS_LETHAL(sig) \
|| (sig == SIGKILL || sig == SIGPIPE))
#define SIGS_IS_STACKTRACE(sig) (SIGS_IS_LETHAL(sig) && sig != SIGABRT)
#endif
#include <sys/cdefs.h>
typedef void (*__sighandler_t)(int);
/* Macros used as function pointers. */
#define SIG_ERR ((__sighandler_t) -1) /* error return */
#define SIG_DFL ((__sighandler_t) 0) /* default signal handling */
#define SIG_IGN ((__sighandler_t) 1) /* ignore signal */
#define SIG_HOLD ((__sighandler_t) 2) /* block signal */
#define SIG_CATCH ((__sighandler_t) 3) /* catch signal */
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
defined(_NETBSD_SOURCE)
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
#include <sys/siginfo.h>
#endif
#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
#include <sys/ucontext.h>
#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
/*
* Signal vector "template" used in sigaction call.
*/
struct sigaction {
union {
void (*_sa_handler)(int);
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
void (*_sa_sigaction)(int, siginfo_t *, void *);
#endif
} _sa_u; /* signal handler */
sigset_t sa_mask; /* signal mask to apply */
int sa_flags; /* see signal options below */
};
#define sa_handler _sa_u._sa_handler
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
#define sa_sigaction _sa_u._sa_sigaction
#endif
#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
/* Fields for sa_flags. */
#define SA_ONSTACK 0x0001 /* deliver signal on alternate stack */
#define SA_RESETHAND 0x0002 /* reset signal handler when signal caught */
#define SA_NODEFER 0x0004 /* don't block signal while catching it */
#define SA_RESTART 0x0008 /* automatic system call restart */
#define SA_SIGINFO 0x0010 /* extended signal handling */
#define SA_NOCLDWAIT 0x0020 /* don't create zombies */
#define SA_NOCLDSTOP 0x0040 /* don't receive SIGCHLD when child stops */
/* POSIX requires these values for use with sigprocmask(2). */
#define SIG_BLOCK 0 /* for blocking signals */
#define SIG_UNBLOCK 1 /* for unblocking signals */
#define SIG_SETMASK 2 /* for setting the signal mask */
#define SIG_INQUIRE 4 /* for internal use only */
#if defined(_NETBSD_SOURCE)
typedef void (*sig_t)(int); /* type of signal function */
#endif
#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
/*
* Flags used with stack_t/struct sigaltstack.
*/
#define SS_ONSTACK 1 /* Process is executing on an alternate stack */
#define SS_DISABLE 2 /* Alternate stack is disabled */
#define MINSIGSTKSZ 2048 /* Minimal stack size is 2k */
#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
(_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
/*
* Structure used in sigstack call.
*/
struct sigstack {
void *ss_sp; /* signal stack pointer */
int ss_onstack; /* current status */
};
#endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
#if defined(_NETBSD_SOURCE) && !defined(_KERNEL)
/*
* Macro for converting signal number to a mask suitable for
* sigblock().
*/
#define sigmask(n) __sigmask(n)
#define BADSIG SIG_ERR
#endif /* _NETBSD_SOURCE */
#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
defined(_NETBSD_SOURCE)
struct sigevent {
int sigev_notify;
int sigev_signo;
union sigval sigev_value;
void (*sigev_notify_function)(union sigval);
void /* pthread_attr_t */ *sigev_notify_attributes;
};
#define SIGEV_NONE 0
#define SIGEV_SIGNAL 1
#define SIGEV_THREAD 2
#if defined(_NETBSD_SOURCE)
#define SIGEV_SA 3
#endif
#endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */
#endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
/*
* For historical reasons; programs expect signal's return value to be
* defined by <sys/signal.h>.
*/
__BEGIN_DECLS
void (*signal(int, void (*)(int)))(int);
__END_DECLS
#endif /* !_SYS_SIGNAL_H_ */