USBD_CFG_CLIENT_UPDATE
Purpose
Updates client connection information.
Warning: This IOCTL is for use ONLY by the
configuration method of the USB System Device Driver.
Syntax
int ioctl (file, USBD_CFG_CLIENT, arg)Parameter
| Item | Description |
|---|---|
| file | File descriptor that is obtained when USBD special file was opened. |
| arg | Address of the USBENUMCFG structure that is aligned on a 4-byte boundary (see the CLIENTUPDATE structure in the /usr/include/sys/usbdi.h file). |
Description
This ioctl is used by the configuration procedure defined by the USBD to update the device selection criteria that are used by the client driver. Specifically, it updates the hcdevno, addr, cfg, and intfc fields to reflect the current values for the device that is managed by the client.
Execution Environment
This function can be called from the user process environment only.
Return Values
| Value | Description |
|---|---|
| 0 | Indicates successful completion. |
| EINVAL | Indicates wrong device selection criteria. |
| ENODEV | Indicates that no device is found with the device selection criteria. |