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NAME

prop_array_send_ioctl, prop_array_recv_ioctl, prop_dictionary_send_ioctl, prop_dictionary_recv_ioctl, prop_dictionary_sendrecv_ioctl — Send and receive property lists to and from the kernel using ioctl

SYNOPSIS

#include <prop/proplib.h>

int
prop_array_send_ioctl(prop_array_t array, int fd, unsigned long cmd);

int
prop_array_recv_ioctl(int fd, unsigned long cmd, prop_array_t *arrayp);

int
prop_dictionary_send_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd);

int
prop_dictionary_recv_ioctl(int fd, unsigned long cmd, prop_dictionary_t *dictp);

int
prop_dictionary_sendrecv_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd, prop_dictionary_t *dictp);

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_ioctl() and prop_dictionary_recv_ioctl() in an application:

void
foo_setprops(prop_dictionary_t dict)
{
    int fd;

    fd = open("/dev/foo", O_RDWR, 0640);
    if (fd == -1)
        return;

    (void) prop_dictionary_send_ioctl(dict, fd, FOOSETPROPS);

    (void) close(fd);
}

prop_dictionary_t
foo_getprops(void)
{
    prop_dictionary_t dict;
    int fd;

    fd = open("/dev/foo", O_RDONLY, 0640);
    if (fd == -1)
	return (NULL);

    if (prop_dictionary_recv_ioctl(fd, FOOGETPROPS, &dict) != 0)
        return (NULL);

    (void) close(fd);

    return (dict);
}

The prop_dictionary_sendrecv_ioctl() function combines the send and receive functionality, allowing for ioctls that require two-way communication (for example to specify arguments for the ioctl operation).

ERRORS

prop_array_send_ioctl() and prop_dictionary_send_ioctl() will fail if:

[ENOMEM]

Cannot allocate memory

[ENOTSUP]

Not supported

prop_array_recv_ioctl() and prop_dictionary_recv_ioctl() will fail if:

[EIO]

Input/output error

[ENOTSUP]

Not supported

In addition to these, ioctl(2) errors may be returned.

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.