DragonFly On-Line Manual Pages

SIGWAIT(3)            DragonFly Library Functions Manual            SIGWAIT(3)

NAME
     sigwait -- select a set of signals

LIBRARY
     POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS
     #include <signal.h>

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

DESCRIPTION
     The sigwait() function selects a set of signals, specified by set.  If
     none of the selected signals are pending, sigwait() waits until one or
     more of the selected signals has been generated.  Then sigwait()
     atomically clears one of the selected signals from the set of pending
     signals (for the process or for the current thread) and sets the location
     pointed to by sig to the signal number that was cleared.

     The signals specified by set should be blocked at the time of the call to
     sigwait().

RETURN VALUES
     If successful, sigwait() returns 0 and sets the location pointed to by
     sig to the cleared signal number.  Otherwise, an error number is
     returned.

ERRORS
     The sigwait() function will fail if:

     [EINVAL]           The set argument specifies one or more invalid signal
                        numbers.

SEE ALSO
     sigaction(2), sigpending(2), sigsuspend(2), pause(3), pthread_sigmask(3)

STANDARDS
     The sigwait() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').

DragonFly 5.1                    July 20, 2016                   DragonFly 5.1