|SIGSUSPEND(2)||System Calls Manual||SIGSUSPEND(2)|
atomically change the signal mask and wait for
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
returned by sigprocmask(2).
sigsuspend() function always
terminates by being interrupted, returning -1 with
errno set to
sigsuspend() function call conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).
|May 29, 2017||OpenBSD-current|