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SIGSUSPEND(2)		  FreeBSD System Calls Manual		 SIGSUSPEND(2)

NAME
     sigsuspend	-- atomically change the signal	mask and wait for interrupt

SYNOPSIS
     #include <signal.h>

     int
     sigsuspend(const sigset_t *sigmask);

DESCRIPTION
     sigsuspend() temporarily changes the blocked signal mask to the set to
     which sigmask points, and then waits for a	signal to arrive; on return
     the previous set of masked	signals	is restored.  The signal mask set is
     usually empty to indicate that all	signals	are to be unblocked for	the
     duration of the call.

     In	normal usage, a	signal is blocked using	sigprocmask(2) to begin	a
     critical section, variables modified on the occurrence of the signal are
     examined to determine that	there is no work to be done, and the process
     pauses awaiting work by using sigsuspend()	with the previous mask re-
     turned by sigprocmask(2).

RETURN VALUES
     The sigsuspend() function always terminates by being interrupted, return-
     ing -1 with errno set to EINTR.

SEE ALSO
     sigaction(2), sigprocmask(2), sigaddset(3)

STANDARDS
     The sigsuspend() function call conforms to	IEEE Std 1003.1-2008
     ("POSIX.1").

FreeBSD	13.0			 May 29, 2017			  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS

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