PROP_SEND_SYCALL(3)					   BSD Library Functions Manual 				       PROP_SEND_SYCALL(3)

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 property container object library first appeared in NetBSD 4.0.

BSD
								 January 17, 2011							       BSD