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SIGWAIT (2) | System calls | Unix Manual Pages | :man

NAME

sigwait - select a set of signals

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In signal.h int sigwait "const sigset_t * restrict set" "int * restrict sig"

DESCRIPTION

The sigwait system call selects a set of signals, specified by set. If none of the selected signals are pending, sigwait waits until one or more of the selected signals has been generated. Then sigwait atomically clears one of the selected signals from the set of pending signals for the process and sets the location pointed to by sig to the signal number that was cleared.

The signals specified by set should be blocked at the time of the call to sigwait.

RETURN VALUES

If successful, sigwait returns 0 and sets the location pointed to by sig to the cleared signal number. Otherwise, an error number is returned.

ERRORS

The sigwait system call will fail if:
[EINVAL]
The set argument specifies one or more invalid signal numbers.

SEE ALSO

sigaction(2), sigpending(2), sigsuspend(2), pause(3), pthread_sigmask(3)

STANDARDS


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