SIGSETOPS

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
CONFORMING TO
SEE ALSO

NAME

sigemptyset, sigfillset, sigaddset, sigdelset, sigismember − POSIX signal set operations.

SYNOPSIS

#include <signal.h>

int sigemptyset(sigset_t *set);

int sigfillset(sigset_t *set);

int sigaddset(sigset_t *set, int signum);

int sigdelset(sigset_t *set, int signum);

int sigismember(const sigset_t *set, int signum);

DESCRIPTION

The sigsetops(3) functions allow the manipulation of POSIX signal sets.

sigemptyset initializes the signal set given by set to empty, with all signals excluded from the set.

sigfillset initializes set to full, including all signals.

sigaddset and sigdelset add and delete respectively signal signum from set.

sigismember tests whether signum is a member of set.

RETURN VALUES

sigemptyset, sigfullset, sigaddset and sigdelset return 0 on success and -1 on error.

sigismember returns 1 if signum is a member of set, 0 if signum is not a member, and -1 on error.

ERRORS

EINVAL

sig is not a valid signal.

CONFORMING TO

POSIX

SEE ALSO

sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2)