SIGSETOPS(3) | Library Functions Manual | SIGSETOPS(3) |
sigemptyset
, sigfillset
,
sigaddset
, sigdelset
,
sigismember
—
#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);
sigemptyset
()
or sigfillset
() must be called for every object of
type sigset_t before any other use of the object.
The sigemptyset
() function initializes a
signal set to be empty.
The sigfillset
() function initializes a
signal set to contain all signals.
The sigaddset
() function adds the
specified signal signo to the signal set.
The sigdelset
() function deletes the
specified signal signo from the signal set.
The sigismember
() function returns whether
a specified signal signo is contained in the signal
set.
sigemptyset
() and
sigfillset
() are provided as macros, but actual
functions are available if their names are undefined (with #undef
name).
sigismember
() function returns 1 if the signal is a
member of the set, a 0 otherwise. The other functions return 0 upon success. A
-1 return value indicates an error occurred and the global variable
errno is set to indicate the reason.
EINVAL
]June 4, 1993 | NetBSD 9.2 |