signal.c File Reference

Functions
	_syscall0 (_syscall3(int, sigreturn)
	Implement the sigreturn function. More...
sighandler_t	signal (int signum, sighandler_t handler)
	Sets the disposition of the signal signum to handler. More...
int	sigaction (int signum, const sigaction_t *act, sigaction_t *oldact)
	Examine and change a signal action. More...
const char *	strsignal (int sig)
	Returns the string describing the given signal. More...
int	sigemptyset (sigset_t *set)
	Prepare an empty set. More...
int	sigfillset (sigset_t *set)
	Prepare a full set. More...
int	sigaddset (sigset_t *set, int signum)
	Adds the given signal to the correct set. More...
int	sigdelset (sigset_t *set, int signum)
	Removes the given signal to the correct set. More...
int	sigismember (sigset_t *set, int signum)
	Checks if the given signal is part of the set. More...

Detailed Description

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.

Function Documentation

_syscall0()

_syscall0	(	_syscall3(	int,
		sigreturn
	)

Implement the sigreturn function.

List of signals names.

Parameters

int	Implement the sigprocmask function.

sigaction()

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

Examine and change a signal action.

Parameters

signum	Specifies the signal and can be any valid signal except SIGKILL and SIGSTOP.
act	If non-NULL, the new action for signal signum is installed from act.
oldact	If non-NULL, the previous action is saved in oldact.

Returns

returns 0 on success; on error, -1 is returned, and errno is set to indicate the error.

sigaddset()

int sigaddset	(	sigset_t *	set,
		int	signum
	)

Adds the given signal to the correct set.

Parameters

set	The set to manipulate.
signum	The signalt to handle.

Returns

0 on success and -1 on error.

sigdelset()

int sigdelset	(	sigset_t *	set,
		int	signum
	)

Removes the given signal to the correct set.

Parameters

set	The set to manipulate.
signum	The signalt to handle.

Returns

0 on success and -1 on error.

sigemptyset()

int sigemptyset

(

sigset_t *

set

)

Prepare an empty set.

Parameters

set	The set to manipulate.

Returns

0 on success and -1 on error.

sigfillset()

int sigfillset

(

sigset_t *

set

)

Prepare a full set.

Parameters

set	The set to manipulate.

Returns

0 on success and -1 on error.

sigismember()

int sigismember	(	sigset_t *	set,
		int	signum
	)

Checks if the given signal is part of the set.

Parameters

set	The set to manipulate.
signum	The signalt to handle.

Returns

1 if signum is a member of set, 0 if signum is not a member, and -1 on error.

signal()

sighandler_t signal	(	int	signum,
		sighandler_t	handler
	)

Sets the disposition of the signal signum to handler.

Parameters

signum	The signal number.
handler	The handler for the signal.

Returns

The previous value of the signal handler, or SIG_ERR on error.

strsignal()

const char* strsignal

(

int

sig

)

Returns the string describing the given signal.

Parameters

sig	The signal to inquire.

Returns

String representing the signal.