NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | EXAMPLE | SEE ALSO | COLOPHON

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

NAME         top

       sigwait - wait for a signal

SYNOPSIS         top

       #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

DESCRIPTION         top

       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         top

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

ERRORS         top

       EINVAL set contains an invalid signal number.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────┬───────────────┬─────────┐
       │Interface Attribute     Value   │
       ├──────────┼───────────────┼─────────┤
       │sigwait() │ Thread safety │ MT-Safe │
       └──────────┴───────────────┴─────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

NOTES         top

       sigwait() is implemented using sigtimedwait(2).

       The glibc implementation of sigwait() silently ignores attempts to
       wait for the two real-time signals that are used internally by the
       NPTL threading implementation.  See nptl(7) for details.

EXAMPLE         top

       See pthread_sigmask(3).

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 4.08 of the Linux man-pages project.  A
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       latest version of this page, can be found at
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Linux                            2016-03-15                       SIGWAIT(3)