Copyright (c) 2003, Sun Microsystems, Inc., All Rights Reserved
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You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
#include <sys/sunldi.h> int ldi_read(ldi_handle_t lh, struct uio *uiop, cred_t *cr);
int ldi_write(ldi_handle_t lh, struct uio *uiop, cred_t *cr);
lh
Layered handle.
cr
Pointer to a credential structure used to open a device.
uiop
Pointer to the uio(9S) structure. uio(9S) specifies the location of the read or write data. (Either userland or kernel.)
The ldi_read() function passes a read request to the device entry point for the device specified by the layered handle. This operation is supported for block, character, and streams devices.
The ldi_write() function passes a write request to the device entry point for a device specified by the layered handle. This operation is supported for block, character, and streams devices.
The ldi_read() and ldi_write() functions return 0 upon success. If a failure occurs before the request is passed to the device, the possible return values are shown below. Otherwise any other error number may be returned by the device.
EINVAL
Invalid input parameters.
ENOTSUP
Operation is not supported for this device.
These functions may be called from user or kernel context.