sigsetops(3C) COMPATIBILITY FUNCTIONS sigsetops(3C)
NAME
sigemptyset, sigfillset, sigaddset, sigdelset, sigismember -
manipulate sets of signals.
SYNOPSIS
#include <signal.h>
int sigemptyset (sigset_t *set);
int sigfillset (sigset_t *set);
int sigaddset (sigset_t *set, int signo);
int sigdelset (sigset_t *set, int signo);
int sigismember (sigset_t *set, int signo);
DESCRIPTION
These functions manipulate sigset_t data types, representing
the set of signals supported by the implementation.
sigemptyset initializes the set pointed to by set to exclude
all signals defined by the system.
sigfillset initializes the set pointed to by set to include
all signals defined by the system.
sigaddset adds the individual signal specified by the value
of signo to the set pointed to by set.
sigdelset deletes the individual signal specified by the
value of signo from the set pointed to by set.
sigismember checks whether the signal specified by the value
of signo is a member of the set pointed to by set.
Any object of type sigset_t must be initialized by applying
either sigemptyset or sigfillset before applying any other
operation.
sigaddset, sigdelset and sigismember will fail if the fol-
lowing is true:
EINVAL The value of the signo argument is not a
valid signal number.
sigfillset will fail if the following is true:
EFAULT The set argument specifies an invalid
address.
Last change: 1
sigsetops(3C) COMPATIBILITY FUNCTIONS sigsetops(3C)
SEE ALSO
sigaction(2), sigprocmask(2), sigpending(2), sigsuspend(2),
signal(5).
DIAGNOSTICS
Upon successful completion, the sigismember function returns
a value of one if the specified signal is a member of the
specified set, or a value of zero if it is not. Upon suc-
cessful completion, the other functions return a value of
zero. Otherwise a value of -1 is returned and errno is set
to indicate the error.
Last change: 2