SIGWAIT
Section: Linux Programmer's Manual (3)
Updated: 2009-02-10
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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 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 3.22 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/.