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SIGWAIT

Linux Programmer's Manual (3)
2013-12-16
 

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)  

COLOPHON

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Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
Multithreading (see pthreads(7))
CONFORMING TO
NOTES
EXAMPLE
SEE ALSO
COLOPHON

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Time: 21:43:02 GMT, July 12, 2014