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

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