signal.h File Reference

#include <sys/types.h>

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Data Structures
union	sigval
struct	siginfo_t
struct	sigaction
struct	sigevent

Macros
#define	SIGUSR1   10
#define	SIGUSR2   12
#define	SIGPOLL   29
#define	SIGSTOP   19
#define	SIGCONT   18
#define	SIGKILL   9
#define	SIGNAL_CNT   6
#define	SA_SIGINFO   0x2
#define	SIGEV_NONE   1
#define	SIGEV_SIGNAL   2

Typedefs
typedef uint32_t	sigset_t
typedef void(*	sa_handler_t) (int)
typedef void(*	sa_sigaction_t) (int, siginfo_t *, void *)

Functions
int	sigemptyset (sigset_t *set)
	Initialize the signal set given by set to empty, with all signals excluded from the set. More...
int	sigfillset (sigset_t *set)
	Initialize the signal set to full, including all signals. More...
int	sigaddset (sigset_t *set, int signum)
	Add a signal into the set. More...
int	sigdelset (sigset_t *set, int signum)
	Delete a signal from the set. More...
int	sigismember (const sigset_t *set, int signum)
	Test whether sugnum is a member of the set. More...
int	sigaction (int signum, const struct sigaction *act, struct sigaction *oldact)
	Set up a signal for the task to catch. More...
int	sigwait (const sigset_t *set, int *sig)
	Suspend execution of the calling task until one of the signals specified in the signal set becomes pending. More...
int	pause (void)
	To cause the calling task (or thread) to sleep until a signal is delivered that either terminate the task or cause the invocation of a signal-catching function. More...
int	kill (pid_t pid, int sig)
	Send a signal to a task. More...
int	raise (int sig)
	Send a signal to the calling task. More...

Function Documentation

kill()

int kill	(	pid_t	pid,
		int	sig
	)

Send a signal to a task.

Parameters

pid	The task ID to provide.
sig	The signal number to provide.

Return values

int	0 on success and nonzero error number on error.

pause()

int pause

(

void

)

To cause the calling task (or thread) to sleep until a signal is delivered that either terminate the task or cause the invocation of a signal-catching function.

Return values

int	0 on success and nonzero error number on error.

raise()

int raise

(

int

sig

)

Send a signal to the calling task.

Parameters

sig	The signal number to provide.

Return values

int	0 on success and nonzero error number on error.

sigaction()

int sigaction	(	int	signum,
		const struct sigaction *	act,
		struct sigaction *	oldact
	)

Set up a signal for the task to catch.

Parameters

signum	The number of the signal to attach.
act	Pointer of the new action setting.
oldact	For preserving old action.

Return values

int	0 on success and nonzero error number on error.

sigaddset()

int sigaddset	(	sigset_t *	set,
		int	signum
	)

Add a signal into the set.

Parameters

set	Pointer to the signal set.
signum	The number of the signal to add into the set.

Return values

int	0 on success and nonzero error number on error.

sigdelset()

int sigdelset	(	sigset_t *	set,
		int	signum
	)

Delete a signal from the set.

Parameters

set	Pointer to the signal set
signum	The number of the signal to delete from the set

Return values

int	0 on success and nonzero error number on error.

sigemptyset()

int sigemptyset

(

sigset_t *

set

)

Initialize the signal set given by set to empty, with all signals excluded from the set.

Parameters

set	Pointer to the signal set.

Return values

int	0 on success and nonzero error number on error.

sigfillset()

int sigfillset

(

sigset_t *

set

)

Initialize the signal set to full, including all signals.

Parameters

set	Pointer to the signal set.

Return values

int	0 on success and nonzero error number on error.

sigismember()

int sigismember	(	const sigset_t *	set,
		int	signum
	)

Test whether sugnum is a member of the set.

Parameters

set	Pointer to the signal set.
signum	The number of the signal to check.

Return values

int	0 on success and nonzero error number on error.

sigwait()

int sigwait	(	const sigset_t *	set,
		int *	sig
	)

Suspend execution of the calling task until one of the signals specified in the signal set becomes pending.

Parameters

set	Pointer to the signal set.
sig	For returning the caught signal.

Return values

int	0 on success and nonzero error number on error.