X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/9bccf70c0258c7cac2dcb80011b2a964d884c552..c3c9b80d004dbbfdf763edeb97968c6997e3b45b:/osfmk/man/device_open.html diff --git a/osfmk/man/device_open.html b/osfmk/man/device_open.html old mode 100755 new mode 100644 index 3fd4c350e..43bb366d7 --- a/osfmk/man/device_open.html +++ b/osfmk/man/device_open.html @@ -1 +1,112 @@ -

device_open


Function - Establish a connection to a device.

SYNOPSIS

#include<device/device.h>

kern_return_t   device_open
                (mach_port_t                        master_port,
                 mach_port_t                             ledger,
                 dev_mode_t                                mode,
                 security_token_t                   security_id,
                 dev_name_t                                name,
                 mach_port_t                             device);


#include<device/device_request.h>

kern_return_t   device_open_request
                (mach_port_t                        master_port,
                 mach_port_t                         reply_port,
                 mach_port_t                             ledger,
                 dev_mode_t                                mode,
                 security_token_t                   security_id,
                 dev_name_t                                name);


kern_return_t   ds_device_open_reply
                (mach_port_t                         reply_port,
                 kern_return_t                      return_code,
                 mach_port_t                             device);

PARAMETERS

master_port
[in device-master send right] The master device port. This port is provided to the bootstrap task.

reply_port
[in reply receive (to be converted to send-once) right] The port to which a reply is to be sent when the device is open.

ledger
[pointer to a ledger send right] Resource ledger from which the device will draw its resources.

mode
[in scalar] Opening mode. This is the bit-wise OR of the following values:

D_READ
Read access

D_WRITE
Write access

D_NODELAY
Do not delay on open

security_id
[in scalar] The security ID that tasks attempting to use this device port must have. A zero value indicates all identities.

name
[pointer to in array of char] Name of the device to open.

return_code
[in scalar] Status of the open.

device
[out device send right, in for asynchronous form] The returned device port.

DESCRIPTION

The device_open function opens a device object. The open operation of the device is invoked, if the device is not already open. The open count for the device is incremented. Each open for a device returns a port, the allowed operations upon which being governed by mode. The port is not distinct.

RETURN VALUES

Only generic errors apply.

RELATED INFORMATION

Functions: device_close, device_reply_server. \ No newline at end of file +

device_open

+
+

+Function - Establish a connection to a device. +

SYNOPSIS

+
+#include<device/device.h>
+
+kern_return_t   device_open
+                (mach_port_t                        master_port,
+                 mach_port_t                             ledger,
+                 dev_mode_t                                mode,
+                 security_token_t                   security_id,
+                 dev_name_t                                name,
+                 mach_port_t                             device);
+
+
+#include<device/device_request.h>
+
+kern_return_t   device_open_request
+                (mach_port_t                        master_port,
+                 mach_port_t                         reply_port,
+                 mach_port_t                             ledger,
+                 dev_mode_t                                mode,
+                 security_token_t                   security_id,
+                 dev_name_t                                name);
+
+
+kern_return_t   ds_device_open_reply
+                (mach_port_t                         reply_port,
+                 kern_return_t                      return_code,
+                 mach_port_t                             device);
+
+

PARAMETERS

+
+

+

master_port +
+[in device-master send right] +The master device port. This port is +provided to the bootstrap task. +

+

reply_port +
+[in reply receive (to be converted to send-once) right] +The port to +which a reply is to be sent when the device is open. +

+

ledger +
+[pointer to a ledger send right] +Resource ledger from which the device will draw its resources. +

+

mode +
+[in scalar] +Opening mode. This is the bit-wise OR of the following +values: +
+

+

D_READ +
+Read access +

+

D_WRITE +
+Write access +

+

D_NODELAY +
+Do not delay on open +
+

+

security_id +
+[in scalar] +The security ID that tasks attempting to use this device port +must have. A zero value indicates all identities. +

+

name +
+[pointer to in array of char] +Name of the device to open. +

+

return_code +
+[in scalar] +Status of the open. +

+

device +
+[out device send right, in for asynchronous form] +The returned device +port. +
+

DESCRIPTION

+

+The device_open function opens a device object. The +open operation of the +device is invoked, if the device is not already open. The open +count for the device +is incremented. Each open for a device returns a port, the allowed +operations upon which being governed by mode. The port is not +distinct. +

RETURN VALUES

+

+Only generic errors apply. +

RELATED INFORMATION

+

+Functions: +device_close, +device_reply_server.