sigismember
Hurricane Electric Internet Services
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, const int signum);
int sigdelset(sigset_t *set, const int signum);
int sigismember(const sigset_t *set, const 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)
Hurricane Electric Internet Services
Copyright (C) 1998
Hurricane Electric.
All Rights Reserved.