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Atari Mega Archive 2
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include
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signal.h
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1990-07-23
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/* The <signal.h> header defines all the ANSI and POSIX signals.
* MINIX supports all the signals required by POSIX. They are defined below.
* Some additional signals are also supported.
*/
#ifndef _SIGNAL_H
#define _SIGNAL_H
/* Here are types that are closely associated with signal handling. */
typedef int sig_atomic_t;
#ifdef _POSIX_SOURCE
typedef unsigned short sigset_t;
#endif
#define _NSIG 16 /* number of signals used */
#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 SIGIOT 6 /* SIGABRT for people who speak PDP-11 */
#define SIGUNUSED 7 /* spare code */
#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 SIGSTKFLT 16 /* used by kernel to indicate stack fault */
#define SIGEMT 7 /* obsolete */
#define SIGBUS 10 /* obsolete */
/* POSIX requires the following signals to be defined, even if they are
* not supported. Here are the definitions, but they are not supported.
*/
#define SIGCHLD 17 /* child process terminated or stopped */
#define SIGCONT 18 /* continue if stopped */
#define SIGSTOP 19 /* stop signal */
#define SIGTSTP 20 /* interactive stop signal */
#define SIGTTIN 21 /* background process wants to read */
#define SIGTTOU 22 /* background process wants to write */
#ifdef _POSIX_SOURCE
#define SA_NOCLDSTOP 1 /* signal parent if child stops */
#endif /* _POSIX_SOURCE */
/* POSIX requires these values for use on system calls involving signals. */
#define SIG_BLOCK 0 /* for blocking signals */
#define SIG_UNBLOCK 1 /* for unblocking signals */
#define SIG_SETMASK 2 /* for setting the signal mask */
#ifndef _ANSI_H
#include <ansi.h>
#endif
/* Macros used as function pointers and one awful prototype. */
#if _ANSI
#define SIG_DFL ((void (*)(int))0) /* default signal handling */
#define SIG_IGN ((void (*)(int))1) /* ignore signal */
#define SIG_ERR ((void (*)(int))-1)
void (*signal(int _sig, void (*_func)(int)))(int);
#ifdef _POSIX_SOURCE
struct sigaction {
void (*sa_handler)(int); /* SIG_DFL, SIG_IGN, or pointer to function */
sigset_t sa_mask; /* signals to be blocked during handler */
int sa_flags; /* special flags */
};
#endif
#else /* !_ANSI */
#define SIG_DFL ((void (*)())0) /* default signal handling */
#define SIG_IGN ((void (*)())1) /* ignore signal */
#define SIG_ERR ((void (*)())-1)
void (*signal()) ();
#ifdef _POSIX_SOURCE /* otherwise sigset_t is not defined */
struct sigaction {
void (*sa_handler)(); /* SIG_DFL, SIG_IGN, or pointer to function */
sigset_t sa_mask; /* signals to be blocked during handler */
int sa_flags; /* special flags */
};
#endif
#endif /* _ANSI */
/* Function Prototypes. */
_PROTOTYPE( int raise, (int _sig) );
#ifdef _POSIX_SOURCE
_PROTOTYPE( int kill, (pid_t _pid, int _sig) );
_PROTOTYPE( int sigaddset, (sigset_t *_set) );
_PROTOTYPE( int sigdelset, (sigset_t *_set) );
_PROTOTYPE( int sigemptyset, (sigset_t *_set) );
_PROTOTYPE( int sigfillset, (sigset_t *_set) );
_PROTOTYPE( int sigismember, (sigset_t *_set, int _signo) );
_PROTOTYPE( int sigpending, (sigset_t *set) );
_PROTOTYPE( int sigprocmask, (int _how, sigset_t *_set, sigset_t *_oset));
_PROTOTYPE( int sigsuspend, (sigset_t *_sigmask) );
_PROTOTYPE( int sigaction,
(int _sig, struct sigaction *_a, struct sigaction *_oact) );
#endif
#endif /* _SIGNAL_H */