SIGWAIT(3)                                          Linux Programmer's Manual                                         SIGWAIT(3)



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 the delivery of one of the signals specified in the
       signal set set.  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(), except that:

       * sigwait() only returns 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.

ERRORS
       EINVAL set contains an invalid signal number.

CONFORMING TO
       POSIX.1-2001.

NOTES
       sigwait() is implemented using sigtimedwait(2).

EXAMPLES
       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 3.25 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                                                      2009-02-10                                                 SIGWAIT(3)