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-<h2>device_write</h2>
<hr>
<p>
<strong>Function</strong> - Write a sequence of bytes to a specific device.
<h3>SYNOPSIS</h3>
<pre>
<strong>#include&ltdevice/device.h&gt</strong>

<strong>kern_return_t   device_write</strong>
                <strong>(device_t</strong>                                <var>device</var>,
                 <strong>mach_port_t</strong>                         <var>reply_port</var>,
                 <strong>dev_mode_t</strong>                                <var>mode</var>,
                 <strong>recnum_t</strong>                                <var>recnum</var>,
                 <strong>io_buf_ptr_t</strong>                              <var>data</var>,
                 <strong>mach_msg_type_number_t</strong>              <var>data_count</var>,
                 <strong>io_buf_len_t</strong>                      <var>io_buf_len_t</var><strong>);</strong>


<strong>#include&ltdevice/device_request.h&gt</strong>

<strong>kern_return_t   device_write_request</strong>
                <strong>(mach_port_t</strong>                             <var>device</var>,
                 <strong>mach_port_t</strong>                         <var>reply_port</var>,
                 <strong>dev_mode_t</strong>                                <var>mode</var>,
                 <strong>recnum_t</strong>                                <var>recnum</var>,
                 <strong>io_buf_ptr_t</strong>                              <var>data</var>,
                 <strong>mach_msg_type_number_t</strong>              <var>data_count</var><strong>);</strong>


<strong>kern_return_t   ds_device_write_reply</strong>
                <strong>(mach_port_t</strong>                         <var>reply_port</var>,
                 <strong>kern_return_t</strong>                      <var>return_code</var>,
                 <strong>io_buf_len_t</strong>                     <var>bytes_written</var><strong>);</strong>
</pre>
<h3>PARAMETERS</h3>
<dl>
<p>
<dt> <var>device</var> 
<dd>
[in device send right]
A device port to the device to be written.
<p>
<dt> <var>reply_port</var> 
<dd>
[in reply receive (to be converted to send-once) right]
The port to 
which the reply message is to be sent.
<p>
<dt> <var>mode</var> 
<dd>
[in scalar]
I/O mode value.  Meaningful options are:
<dl>
<p>
<dt> <strong>D_NOWAIT</strong>
<dd>
Do not wait for I/O completion.
</dl>
<p>
<dt> <var>recnum</var> 
<dd>
[in scalar]
Record number to be written.
<p>
<dt> <var>data</var> 
<dd>
[pointer to in array of bytes]
Data bytes to be written.
<p>
<dt> <var>data_count</var> 
<dd>
[in scalar]
Number of data bytes to be written.
<p>
<dt> <var>return_code</var> 
<dd>
[in scalar]
The return status code from the write.
<p>
<dt> <var>bytes_written</var> 
<dd>
[out scalar, in for asynchronous form]
Size of data transfer.
</dl>
<h3>DESCRIPTION</h3>
<p>
The <strong>device_write</strong> function writes a sequence of bytes
to a device object.  The 
meaning of <var>recnum</var> as well as the specific operation performed is device
dependent.
<h3>RETURN VALUES</h3>
<p>
Only generic errors apply.
<h3>RELATED INFORMATION</h3>
<p>
Functions:
<a href="device_write_inband.html"><strong>device_write_inband</strong></a>,
<a href="device_reply_server.html"><strong>device_reply_server</strong></a>.
\ No newline at end of file
+<h2>device_write</h2>
+<hr>
+<p>
+<strong>Function</strong> - Write a sequence of bytes to a specific device.
+<h3>SYNOPSIS</h3>
+<pre>
+<strong>#include&ltdevice/device.h&gt</strong>
+
+<strong>kern_return_t   device_write</strong>
+                <strong>(device_t</strong>                                <var>device</var>,
+                 <strong>mach_port_t</strong>                         <var>reply_port</var>,
+                 <strong>dev_mode_t</strong>                                <var>mode</var>,
+                 <strong>recnum_t</strong>                                <var>recnum</var>,
+                 <strong>io_buf_ptr_t</strong>                              <var>data</var>,
+                 <strong>mach_msg_type_number_t</strong>              <var>data_count</var>,
+                 <strong>io_buf_len_t</strong>                      <var>io_buf_len_t</var><strong>);</strong>
+
+
+<strong>#include&ltdevice/device_request.h&gt</strong>
+
+<strong>kern_return_t   device_write_request</strong>
+                <strong>(mach_port_t</strong>                             <var>device</var>,
+                 <strong>mach_port_t</strong>                         <var>reply_port</var>,
+                 <strong>dev_mode_t</strong>                                <var>mode</var>,
+                 <strong>recnum_t</strong>                                <var>recnum</var>,
+                 <strong>io_buf_ptr_t</strong>                              <var>data</var>,
+                 <strong>mach_msg_type_number_t</strong>              <var>data_count</var><strong>);</strong>
+
+
+<strong>kern_return_t   ds_device_write_reply</strong>
+                <strong>(mach_port_t</strong>                         <var>reply_port</var>,
+                 <strong>kern_return_t</strong>                      <var>return_code</var>,
+                 <strong>io_buf_len_t</strong>                     <var>bytes_written</var><strong>);</strong>
+</pre>
+<h3>PARAMETERS</h3>
+<dl>
+<p>
+<dt> <var>device</var> 
+<dd>
+[in device send right]
+A device port to the device to be written.
+<p>
+<dt> <var>reply_port</var> 
+<dd>
+[in reply receive (to be converted to send-once) right]
+The port to 
+which the reply message is to be sent.
+<p>
+<dt> <var>mode</var> 
+<dd>
+[in scalar]
+I/O mode value.  Meaningful options are:
+<dl>
+<p>
+<dt> <strong>D_NOWAIT</strong>
+<dd>
+Do not wait for I/O completion.
+</dl>
+<p>
+<dt> <var>recnum</var> 
+<dd>
+[in scalar]
+Record number to be written.
+<p>
+<dt> <var>data</var> 
+<dd>
+[pointer to in array of bytes]
+Data bytes to be written.
+<p>
+<dt> <var>data_count</var> 
+<dd>
+[in scalar]
+Number of data bytes to be written.
+<p>
+<dt> <var>return_code</var> 
+<dd>
+[in scalar]
+The return status code from the write.
+<p>
+<dt> <var>bytes_written</var> 
+<dd>
+[out scalar, in for asynchronous form]
+Size of data transfer.
+</dl>
+<h3>DESCRIPTION</h3>
+<p>
+The <strong>device_write</strong> function writes a sequence of bytes
+to a device object.  The 
+meaning of <var>recnum</var> as well as the specific operation performed is device
+dependent.
+<h3>RETURN VALUES</h3>
+<p>
+Only generic errors apply.
+<h3>RELATED INFORMATION</h3>
+<p>
+Functions:
+<a href="device_write_inband.html"><strong>device_write_inband</strong></a>,
+<a href="device_reply_server.html"><strong>device_reply_server</strong></a>.