SIGWAIT
Section: Linux Programmer's Manual (3)
Updated: 2013-12-16
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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.
ATTRIBUTES
Multithreading (see pthreads(7))
The
sigwait()
function is thread-safe.
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)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- Multithreading (see pthreads(7))
-
- CONFORMING TO
-
- NOTES
-
- EXAMPLE
-
- SEE ALSO
-
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