SIGEMPTYSET(3) | Library Functions Manual | SIGEMPTYSET(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
(const
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.
sigemptyset
() and sigfillset
()
are provided as macros, but actual functions are available if their names are
undefined (with #undef name).
The sigemptyset
() function initializes a
signal set to be empty.
sigfillset
() initializes a signal set to
contain all signals.
sigaddset
() adds the specified signal
signo to the signal set.
sigdelset
() deletes the specified signal
signo from the signal set.
sigismember
() returns whether a specified
signal signo is contained in the signal set.
sigismember
() function returns 1 if the signal is a
member of the set and 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
]November 10, 2015 | OpenBSD-6.1 |