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光驱cdrom读写源代码,scsi命令解析

<a class="l" name="181">    181 </a>	}
<a class="l" name="182">    182 </a>	<b>if</b> (!<a href="/source/s?defs=blank_disc">blank_disc</a>(<a href="/source/s?defs=target">target</a>-&gt;<a href="/source/s?defs=d_fd">d_fd</a>, <a href="/source/s?defs=type">type</a>, <a href="/source/s?defs=immediate">immediate</a>)) {
<a class="l" name="183">    183 </a>		<b>if</b> (<a href="/source/s?defs=ignore_error">ignore_error</a>)
<a class="l" name="184">    184 </a>			<b>return</b>;
<a class="l" name="185">    185 </a>		<a href="/source/s?defs=err_msg">err_msg</a>(<a href="/source/s?defs=gettext">gettext</a>(<span class="s">"Blank command failed\n"</span>));
<a class="l" name="186">    186 </a>		<b>if</b> (<a href="/source/s?defs=debug">debug</a>)
<a class="l" name="187">    187 </a>			(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<span class="s">"%x %x %x %x\n"</span>, <a href="/source/s?defs=uscsi_status">uscsi_status</a>,
<a class="l" name="188">    188 </a>			    <a href="/source/s?defs=SENSE_KEY">SENSE_KEY</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>), <a href="/source/s?defs=ASC">ASC</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>), <a href="/source/s?defs=ASCQ">ASCQ</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>));
<a class="l" name="189">    189 </a>		<b>goto</b> <a href="/source/s?defs=blank_failed">blank_failed</a>;
<a class="hl" name="190">    190 </a>	}
<a class="l" name="191">    191 </a>	<span class="c">/* Allow the blanking to start */</span>
<a class="l" name="192">    192 </a>	(<b>void</b>) <a href="/source/s?defs=sleep">sleep</a>(<span class="n">10</span>);
<a class="l" name="193">    193 </a>
<a class="l" name="194">    194 </a>	<span class="c">/*
<a class="l" name="195">    195 </a>	 * set ATAPI devices to immediately return from the command and poll
<a class="l" name="196">    196 </a>	 * so that we don't hog the channel.
<a class="l" name="197">    197 </a>	 */</span>
<a class="l" name="198">    198 </a>
<a class="l" name="199">    199 </a>	<b>if</b> (<a href="/source/s?defs=immediate">immediate</a>) {
<a class="hl" name="200">    200 </a>		<a href="/source/s?defs=di">di</a> = (<a href="/source/s?defs=uchar_t">uchar_t</a> *)<a href="/source/s?defs=my_zalloc">my_zalloc</a>(<a href="/source/s?defs=DISC_INFO_BLOCK_SIZE">DISC_INFO_BLOCK_SIZE</a>);
<a class="l" name="201">    201 </a>		<span class="c">/* Blanking should not take more than 75 minutes */</span>
<a class="l" name="202">    202 </a>		<b>for</b> (<a href="/source/s?defs=count">count</a> = <span class="n">0</span>; <a href="/source/s?defs=count">count</a> &lt; (<span class="n">16*60</span>); <a href="/source/s?defs=count">count</a>++) {
<a class="l" name="203">    203 </a>			<a href="/source/s?defs=ret">ret</a> = <a href="/source/s?defs=read_disc_info">read_disc_info</a>(<a href="/source/s?defs=target">target</a>-&gt;<a href="/source/s?defs=d_fd">d_fd</a>, <a href="/source/s?defs=di">di</a>);
<a class="l" name="204">    204 </a>			<b>if</b> (<a href="/source/s?defs=ret">ret</a> != <span class="n">0</span>)
<a class="l" name="205">    205 </a>				<b>break</b>;
<a class="l" name="206">    206 </a>			<b>if</b> (<a href="/source/s?defs=uscsi_status">uscsi_status</a> != <span class="n">2</span>)
<a class="l" name="207">    207 </a>				<a href="/source/s?defs=err">err</a> = <span class="n">1</span>;
<a class="l" name="208">    208 </a>			<span class="c">/* not ready but not becoming ready */</span>
<a class="l" name="209">    209 </a>			<b>if</b> (<a href="/source/s?defs=SENSE_KEY">SENSE_KEY</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>) == <span class="n">2</span>) {
<a class="hl" name="210">    210 </a>				<b>if</b> (<a href="/source/s?defs=ASC">ASC</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>) != <span class="n">4</span>)
<a class="l" name="211">    211 </a>					<a href="/source/s?defs=err">err</a> = <span class="n">1</span>;
<a class="l" name="212">    212 </a>			<span class="c">/* illegal mode for this track */</span>
<a class="l" name="213">    213 </a>			} <b>else</b> <b>if</b> (<a href="/source/s?defs=SENSE_KEY">SENSE_KEY</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>) == <span class="n">5</span>) {
<a class="l" name="214">    214 </a>				<b>if</b> (<a href="/source/s?defs=ASC">ASC</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>) != <span class="n">0x64</span>)
<a class="l" name="215">    215 </a>					<a href="/source/s?defs=err">err</a> = <span class="n">1</span>;
<a class="l" name="216">    216 </a>			} <b>else</b> {
<a class="l" name="217">    217 </a>				<a href="/source/s?defs=err">err</a> = <span class="n">1</span>;
<a class="l" name="218">    218 </a>			}
<a class="l" name="219">    219 </a>			<b>if</b> (<a href="/source/s?defs=err">err</a> == <span class="n">1</span>) {
<a class="hl" name="220">    220 </a>				<b>if</b> (<a href="/source/s?defs=ignore_error">ignore_error</a>)
<a class="l" name="221">    221 </a>					<b>break</b>;
<a class="l" name="222">    222 </a>				<a href="/source/s?defs=err_msg">err_msg</a>(<a href="/source/s?defs=gettext">gettext</a>(<span class="s">"Blanking operation failed\n"</span>));
<a class="l" name="223">    223 </a>				<b>if</b> (<a href="/source/s?defs=debug">debug</a>) {
<a class="l" name="224">    224 </a>					(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<span class="s">"%x %x %x %x\n"</span>,
<a class="l" name="225">    225 </a>					    <a href="/source/s?defs=uscsi_status">uscsi_status</a>, <a href="/source/s?defs=SENSE_KEY">SENSE_KEY</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>),
<a class="l" name="226">    226 </a>					    <a href="/source/s?defs=ASC">ASC</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>), <a href="/source/s?defs=ASCQ">ASCQ</a>(<a href="/source/s?defs=rqbuf">rqbuf</a>));
<a class="l" name="227">    227 </a>				}
<a class="l" name="228">    228 </a>				<a href="/source/s?defs=free">free</a>(<a href="/source/s?defs=di">di</a>);
<a class="l" name="229">    229 </a>				<b>goto</b> <a href="/source/s?defs=blank_failed">blank_failed</a>;
<a class="hl" name="230">    230 </a>			}
<a class="l" name="231">    231 </a>			(<b>void</b>) <a href="/source/s?defs=sleep">sleep</a>(<span class="n">5</span>);
<a class="l" name="232">    232 </a>		}
<a class="l" name="233">    233 </a>		<a href="/source/s?defs=free">free</a>(<a href="/source/s?defs=di">di</a>);
<a class="l" name="234">    234 </a>		<b>if</b> (<a href="/source/s?defs=count">count</a> == (<span class="n">16*60</span>)) {
<a class="l" name="235">    235 </a>			<b>if</b> (!<a href="/source/s?defs=silent_pass">silent_pass</a>) {
<a class="l" name="236">    236 </a>				(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<a href="/source/s?defs=gettext">gettext</a>(
<a class="l" name="237">    237 </a>				    <span class="s">"Blank command timed out.\n"</span>));
<a class="l" name="238">    238 </a>			}
<a class="l" name="239">    239 </a>			<b>goto</b> <a href="/source/s?defs=blank_failed">blank_failed</a>;
<a class="hl" name="240">    240 </a>		}
<a class="l" name="241">    241 </a>	}
<a class="l" name="242">    242 </a>	<span class="c">/* we are doing a second pass. We don't want to re-print messsages */</span>
<a class="l" name="243">    243 </a>	<b>if</b> (!<a href="/source/s?defs=silent_pass">silent_pass</a>) {
<a class="l" name="244">    244 </a>		<span class="c">/* l10n_NOTE : 'done' as in "Erasing track 1...done"  */</span>
<a class="l" name="245">    245 </a>		(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<a href="/source/s?defs=gettext">gettext</a>(<span class="s">"done.\n"</span>));
<a class="l" name="246">    246 </a>	}
<a class="l" name="247">    247 </a>
<a class="l" name="248">    248 </a>	<span class="c">/*
<a class="l" name="249">    249 </a>	 * some cruft left from all blanking, this has been seen on some
<a class="hl" name="250">    250 </a>	 * newer drives including Toshiba SD-6112 DVD-RW and Sony 510A.
<a class="l" name="251">    251 </a>	 * we will do a second pass with a recursive call to blank the
<a class="l" name="252">    252 </a>	 * lead-in.
<a class="l" name="253">    253 </a>	 */</span>
<a class="l" name="254">    254 </a>	<b>if</b> (<a href="/source/s?defs=type">type</a> == <a href="/source/s?defs=ALL">ALL</a>) {
<a class="l" name="255">    255 </a>		<b>if</b> (<a href="/source/s?defs=check_device">check_device</a>(<a href="/source/s?defs=target">target</a>,  <a href="/source/s?defs=CHECK_MEDIA_IS_NOT_BLANK">CHECK_MEDIA_IS_NOT_BLANK</a>)) {
<a class="l" name="256">    256 </a>			<a href="/source/s?defs=blanking_type">blanking_type</a> = <span class="s">"clear"</span>;
<a class="l" name="257">    257 </a>			<a href="/source/s?defs=blank">blank</a>();
<a class="l" name="258">    258 </a>			<b>if</b> (<a href="/source/s?defs=silent_pass">silent_pass</a>)
<a class="l" name="259">    259 </a>				<b>return</b>;
<a class="hl" name="260">    260 </a>			<a href="/source/s?defs=exit">exit</a>(<span class="n">0</span>);
<a class="l" name="261">    261 </a>		}
<a class="l" name="262">    262 </a>	}
<a class="l" name="263">    263 </a>
<a class="l" name="264">    264 </a>	<span class="c">/*
<a class="l" name="265">    265 </a>	 * We erased part of the leadout for the media to unclose
<a class="l" name="266">    266 </a>	 * the disk, we still need to generate an appendable leadout
<a class="l" name="267">    267 </a>	 * so that the next track can be written. so do not eject or exit.
<a class="l" name="268">    268 </a>	 */</span>
<a class="l" name="269">    269 </a>	<b>if</b> (<a href="/source/s?defs=silent_pass">silent_pass</a>)
<a class="hl" name="270">    270 </a>		<b>return</b>;
<a class="l" name="271">    271 </a>
<a class="l" name="272">    272 </a>	<b>if</b> (<a href="/source/s?defs=vol_running">vol_running</a>)
<a class="l" name="273">    273 </a>		(<b>void</b>) <a href="/source/s?defs=eject_media">eject_media</a>(<a href="/source/s?defs=target">target</a>);
<a class="l" name="274">    274 </a>	<a href="/source/s?defs=exit">exit</a>(<span class="n">0</span>);
<a class="l" name="275">    275 </a><a href="/source/s?defs=blank_failed">blank_failed</a>:
<a class="l" name="276">    276 </a>	<b>if</b> ((<a href="/source/s?defs=type">type</a> != <a href="/source/s?defs=ALL">ALL</a>) &amp;&amp; !<a href="/source/s?defs=silent_pass">silent_pass</a>) {
<a class="l" name="277">    277 </a>		(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<span class="s">"Try using blanking type 'all'\n"</span>);
<a class="l" name="278">    278 </a>	}
<a class="l" name="279">    279 </a>	<b>if</b> (<a href="/source/s?defs=silent_pass">silent_pass</a>)
<a class="hl" name="280">    280 </a>		<b>return</b>;
<a class="l" name="281">    281 </a>	<b>if</b> (<a href="/source/s?defs=vol_running">vol_running</a>)
<a class="l" name="282">    282 </a>		(<b>void</b>) <a href="/source/s?defs=eject_media">eject_media</a>(<a href="/source/s?defs=target">target</a>);
<a class="l" name="283">    283 </a>	<a href="/source/s?defs=exit">exit</a>(<span class="n">1</span>);
<a class="l" name="284">    284 </a>}
<a class="l" name="285">    285 </a></pre></div>
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