SIGSETOPS(2P) SIGSETOPS(2P)
NAME
sigaddset, sigdelset, sigismember, sigfillset - manipulate
signal sets
SYNOPSIS
#include <signal.h>
int sigaddset(set,signo)
sigsett *set;
int signo;
int sigdelset(set,signo)
sigsett *set;
int signo;
int sigismember(set,signo)
sigsett *set;
int signo;
int sigfillset(set)
sigsett *set;
int siginitset(set)
sigsett *set;
DESCRIPTION
sigaddset adds the signal specified by signo to the set
pointed to by set.
sigdelset deletes the signal specified by signo from the set
pointed to by set.
This system defines the following signals:
SIGABRT SIGTERM SIGIOT
SIGALRM SIGUSR1 SIGEMT
SIGFPE SIGUSR2 SIGBUS
SIGHUP SIGCHILD SIGSYS
SIGILL SIGCONT SIGPWR
SIGINT SIGSTOP SIGPOLL
SIGKILL SIGTSTP SIGURG
Page 1 May 1989
SIGSETOPS(2P) SIGSETOPS(2P)
SIGPIPE SIGTTIN SIGWINCH
SIGQUIT SIGTTOU SIGVTALRM
SIGSEGV SIGTRAP SIGPROF
sigfillset initializes the signal set pointed to by set such
that all signals listed above are included.
sigismember tests whether the signal specified by signo is a
member of the set pointed to by set. Applications should
call sigemptyset(3P) or sigfillset(3P) for each object of
type sigsett before any other use of the object.
RETURN VALUE
Upon successful completion, sigismember returns 1 if the
specified signal is a member of the specified set and zero
if it is not. Upon successful completion, each of the other
functions returns zero. For all the above functions, if an
error is detected, the function will return -1 and set errno
to indicate the error.
ERRORS
If the following condition occurs, the function shall return
-1 and set errno to the corresponding value.
[EINVAL] The value of signo is not a valid signal
number.
SEE ALSO
sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2),
sigvec(2).
Page 2 May 1989