trusty (3) sigwait.3.gz

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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/.