NAME

       sigwait - wait for a signal

SYNOPSIS

       #include <signal.h>

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

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       sigwait(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE

DESCRIPTION

       The sigwait() function suspends execution of the calling thread until one of the signals specified in the
       signal  set  set  becomes  pending.  The function accepts the signal (removes it from the pending list of
       signals), and returns the signal number in sig.

       The operation of sigwait() is the same as sigwaitinfo(2), except that:

       * sigwait() returns only the signal number, rather than a siginfo_t structure describing the signal.

       * The return values of the two functions are different.

RETURN VALUE

       On success, sigwait() returns 0.  On error, it returns a positive error number (listed in ERRORS).

ERRORS

       EINVAL set contains an invalid signal number.

CONFORMING TO

       POSIX.1-2001.

NOTES

       sigwait() is implemented using sigtimedwait(2).

EXAMPLE

       See pthread_sigmask(3).

SEE ALSO

       sigaction(2), signalfd(2), sigpending(2), sigsuspend(2), sigwaitinfo(2), sigsetops(3), signal(7)

COLOPHON

       This page is part of release 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

Linux                                              2012-07-21                                         SIGWAIT(3)