NAME    [Toc]    [Back]

     sigwait -- select a set of signals

LIBRARY    [Toc]    [Back]

     Reentrant C Library (libc_r, -lc_r)

SYNOPSIS    [Toc]    [Back]

     #include <signal.h>

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

DESCRIPTION    [Toc]    [Back]

     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 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    [Toc]    [Back]

     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    [Toc]    [Back]

     The sigwait() function will fail if:

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

SEE ALSO    [Toc]    [Back]

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

STANDARDS    [Toc]    [Back]

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


FreeBSD 5.2.1			April 27, 2000			 FreeBSD 5.2.1