POSIX_REALTIME_SIGNALS

POSIX Realtime Signals option group. More...

Functions
int	sigqueue (pid_t pid, int sig, union sigval value)
	Queue a signal and data to a process.
int	sigtimedwait (const sigset_t *ZRESTRICT set, siginfo_t *ZRESTRICT info, const struct timespec *ZRESTRICT timeout)
	Wait for a queued signal with a timeout.
int	sigwaitinfo (const sigset_t *ZRESTRICT set, siginfo_t *ZRESTRICT info)
	Wait for a queued signal (no timeout).

Detailed Description

POSIX Realtime Signals option group.

Function Documentation

sigqueue()

int sigqueue	(	pid_t	pid,
		int	sig,
		union sigval	value
	)

Queue a signal and data to a process.

Parameters

pid	Target process ID.
sig	Signal number.
value	Value to deliver along with the signal.

Returns

0 on success, or -1 with errno set on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigqueue.html

sigtimedwait()

int sigtimedwait	(	const sigset_t *ZRESTRICT	set,
		siginfo_t *ZRESTRICT	info,
		const struct timespec *ZRESTRICT	timeout
	)

Wait for a queued signal with a timeout.

Parameters

set	Set of signals to wait for.
info	Output: information about the accepted signal, or NULL.
timeout	Maximum time to wait.

Returns

Signal number on success, or -1 with errno set on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigtimedwait.html

sigwaitinfo()

int sigwaitinfo	(	const sigset_t *ZRESTRICT	set,
		siginfo_t *ZRESTRICT	info
	)

Wait for a queued signal (no timeout).

Parameters

set	Set of signals to wait for.
info	Output: information about the accepted signal, or NULL.

Returns

Signal number on success, or -1 with errno set on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/sigwaitinfo.html