NAME
prop_array_send_syscall,
prop_array_recv_syscall,
prop_dictionary_send_syscall,
prop_dictionary_recv_syscall —
send
and receive property lists to and from the kernel using syscalls
SYNOPSIS
#include <prop/proplib.h>
int
prop_array_send_syscall(
prop_array_t
array,
struct plistref
*prefp);
int
prop_array_recv_syscall(
const
struct plistref *prefp,
prop_array_t *arrayp);
int
prop_dictionary_send_syscall(
prop_dictionary_t
dict,
struct plistref
*prefp);
int
prop_dictionary_recv_syscall(
const
struct plistref *prefp,
prop_dictionary_t *dictp);
DESCRIPTION
The
prop_array_send_syscall(),
prop_array_recv_syscall(),
prop_dictionary_send_syscall(), and
prop_dictionary_recv_syscall() functions implement the user
space side of a protocol for sending property lists to and from the kernel
using
syscall(2).
RETURN VALUES
If successful, functions return zero. Otherwise, an error number is returned to
indicate the error.
EXAMPLES
The following (simplified) example demonstrates using
prop_dictionary_send_syscall() and
prop_dictionary_recv_syscall() in an application:
void
foo_setprops(prop_dictionary_t dict)
{
struct pref pref;
(void) prop_dictionary_send_syscall(dict, &pref);
(void) my_syscall_set(&pref);
}
prop_dictionary_t
foo_getprops(void)
{
prop_dictionary_t dict;
struct pref pref;
(void) my_syscall_get(&pref);
if (prop_dictionary_recv_syscall(&pref, &dict) != 0)
return (NULL);
return (dict);
}
ERRORS
prop_array_send_syscall() and
prop_dictionary_send_syscall() will fail if:
-
-
- [
ENOMEM
]
- Cannot allocate memory
-
-
- [
ENOTSUP
]
- Not supported
prop_array_recv_syscall() and
prop_dictionary_recv_syscall() will fail if:
-
-
- [
EIO
]
- Input/output error
-
-
- [
ENOTSUP
]
- Not supported
SEE ALSO
prop_array(3),
prop_dictionary(3),
proplib(3),
prop_copyin_ioctl(9)
HISTORY
The
proplib(3) property container
object library first appeared in
NetBSD 4.0.