signal.h

LINUX1.0内核源代码,学习LINUX编程的一定要看。

#ifndef _LINUX_SIGNAL_H
#define _LINUX_SIGNAL_H

typedef unsigned int sigset_t;		/* 32 bits */

#define _NSIG             32
#define NSIG		_NSIG

#define SIGHUP		 1
#define SIGINT		 2
#define SIGQUIT		 3
#define SIGILL		 4
#define SIGTRAP		 5
#define SIGABRT		 6
#define SIGIOT		 6
#define SIGUNUSED	 7
#define SIGFPE		 8
#define SIGKILL		 9
#define SIGUSR1		10
#define SIGSEGV		11
#define SIGUSR2		12
#define SIGPIPE		13
#define SIGALRM		14
#define SIGTERM		15
#define SIGSTKFLT	16
#define SIGCHLD		17
#define SIGCONT		18
#define SIGSTOP		19
#define SIGTSTP		20
#define SIGTTIN		21
#define SIGTTOU		22

/*
 * Most of these aren't used yet (and perhaps never will),
 * so they are commented out.
 */


#define SIGIO		23
#define SIGPOLL		SIGIO
#define SIGURG		SIGIO
#define SIGXCPU		24
#define SIGXFSZ		25


#define SIGVTALRM	26
#define SIGPROF		27

#define SIGWINCH	28

/*
#define SIGLOST		29
*/
#define SIGPWR		30

/* Arggh. Bad user source code wants this.. */
#define SIGBUS		SIGUNUSED

/*
 * sa_flags values: SA_STACK is not currently supported, but will allow the
 * usage of signal stacks by using the (now obsolete) sa_restorer field in
 * the sigaction structure as a stack pointer. This is now possible due to
 * the changes in signal handling. LBT 010493.
 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
 * SA_RESTART flag to get restarting signals (which were the default long ago)
 */
#define SA_NOCLDSTOP	1
#define SA_STACK	0x08000000
#define SA_RESTART	0x10000000
#define SA_INTERRUPT	0x20000000
#define SA_NOMASK	0x40000000
#define SA_ONESHOT	0x80000000

#define SIG_BLOCK          0	/* for blocking signals */
#define SIG_UNBLOCK        1	/* for unblocking signals */
#define SIG_SETMASK        2	/* for setting the signal mask */

/* Type of a signal handler.  */
typedef void (*__sighandler_t)(int);

#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */

struct sigaction {
	__sighandler_t sa_handler;
	sigset_t sa_mask;
	int sa_flags;
	void (*sa_restorer)(void);
};

#endif