124 lines
4.8 KiB
C
Executable file
124 lines
4.8 KiB
C
Executable file
/* 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
|
|
|
|
#ifndef _ANSI_H
|
|
#include <ansi.h>
|
|
#endif
|
|
#ifdef _POSIX_SOURCE
|
|
#ifndef _TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
#endif
|
|
|
|
/* Here are types that are closely associated with signal handling. */
|
|
typedef int sig_atomic_t;
|
|
|
|
#ifdef _POSIX_SOURCE
|
|
#ifndef _SIGSET_T
|
|
#define _SIGSET_T
|
|
typedef unsigned long sigset_t;
|
|
#endif
|
|
#endif
|
|
|
|
/* 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 */
|
|
|
|
/* 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 */
|
|
|
|
#define _NSIG 23 /* number of signals used */
|
|
|
|
#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.
|
|
*/
|
|
#define SIGKMESS 29 /* new kernel message */
|
|
#define SIGKSIG 30 /* kernel signal pending */
|
|
#define SIGKSTOP 31 /* kernel shutting down */
|
|
|
|
#endif
|
|
|
|
/* The sighandler_t type is not allowed unless _POSIX_SOURCE is defined. */
|
|
typedef void _PROTOTYPE( (*__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 */
|
|
#define SIG_MESS ((__sighandler_t) 4) /* pass as message (MINIX) */
|
|
|
|
#ifdef _POSIX_SOURCE
|
|
struct sigaction {
|
|
__sighandler_t 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 */
|
|
};
|
|
|
|
/* 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 */
|
|
#endif /* _POSIX_SOURCE */
|
|
|
|
/* POSIX and ANSI function prototypes. */
|
|
_PROTOTYPE( int raise, (int _sig) );
|
|
_PROTOTYPE( __sighandler_t signal, (int _sig, __sighandler_t _func) );
|
|
|
|
#ifdef _POSIX_SOURCE
|
|
_PROTOTYPE( int kill, (pid_t _pid, int _sig) );
|
|
_PROTOTYPE( int sigaction,
|
|
(int _sig, const struct sigaction *_act, struct sigaction *_oact) );
|
|
_PROTOTYPE( int sigaddset, (sigset_t *_set, int _sig) );
|
|
_PROTOTYPE( int sigdelset, (sigset_t *_set, int _sig) );
|
|
_PROTOTYPE( int sigemptyset, (sigset_t *_set) );
|
|
_PROTOTYPE( int sigfillset, (sigset_t *_set) );
|
|
_PROTOTYPE( int sigismember, (const sigset_t *_set, int _sig) );
|
|
_PROTOTYPE( int sigpending, (sigset_t *_set) );
|
|
_PROTOTYPE( int sigprocmask,
|
|
(int _how, const sigset_t *_set, sigset_t *_oset) );
|
|
_PROTOTYPE( int sigsuspend, (const sigset_t *_sigmask) );
|
|
#endif
|
|
|
|
#endif /* _SIGNAL_H */
|