util.c.htm

光驱cdrom读写源代码,scsi命令解析

<a class="l" name="189">    189 </a>	<a href="/source/s?defs=progress_pos">progress_pos</a> = <span class="n">0</span>;
<a class="hl" name="190">    190 </a>	<a href="/source/s?defs=last_total">last_total</a> = <span class="n">0</span>;
<a class="l" name="191">    191 </a>	<a href="/source/s?defs=tm">tm</a> = <a href="/source/s?defs=time">time</a>(<a href="/source/s?defs=NULL">NULL</a>);
<a class="l" name="192">    192 </a>}
<a class="l" name="193">    193 </a>
<a class="l" name="194">    194 </a><b>int</b>
<a class="l" name="195">    195 </a><a href="/source/s?defs=progress">progress</a>(<a href="/source/s?defs=int64_t">int64_t</a> <a href="/source/s?defs=arg">arg</a>, <a href="/source/s?defs=int64_t">int64_t</a> <a href="/source/s?defs=completed">completed</a>)
<a class="l" name="196">    196 </a>{
<a class="l" name="197">    197 </a>	<b>char</b> s[<a href="/source/s?defs=BUFSIZE">BUFSIZE</a>];
<a class="l" name="198">    198 </a>	<a href="/source/s?defs=uint64_t">uint64_t</a> <a href="/source/s?defs=total">total</a> = (<a href="/source/s?defs=uint64_t">uint64_t</a>)<a href="/source/s?defs=arg">arg</a>;
<a class="l" name="199">    199 </a>
<a class="hl" name="200">    200 </a>	<b>if</b> (<a href="/source/s?defs=completed">completed</a> == -<span class="n">1</span>) {
<a class="l" name="201">    201 </a>		<span class="c">/* Got ^C. Add 2 to progress pos to compensate for ^ and C */</span>
<a class="l" name="202">    202 </a>		<a href="/source/s?defs=progress_pos">progress_pos</a> = <a href="/source/s?defs=str_print">str_print</a>(<span class="s">"(flushing ...)"</span>, <a href="/source/s?defs=progress_pos">progress_pos</a>+<span class="n">2</span>);
<a class="l" name="203">    203 </a>		<b>return</b> (<span class="n">0</span>);
<a class="l" name="204">    204 </a>	}
<a class="l" name="205">    205 </a>	<b>if</b> (<a href="/source/s?defs=total">total</a> == <span class="n">0</span>) {
<a class="l" name="206">    206 </a>		<b>if</b> (<a href="/source/s?defs=tm">tm</a> != <a href="/source/s?defs=time">time</a>(<a href="/source/s?defs=NULL">NULL</a>)) {
<a class="l" name="207">    207 </a>			<a href="/source/s?defs=tm">tm</a> = <a href="/source/s?defs=time">time</a>(<a href="/source/s?defs=NULL">NULL</a>);
<a class="l" name="208">    208 </a>			(<b>void</b>) <a href="/source/s?defs=snprintf">snprintf</a>(s, <a href="/source/s?defs=BUFSIZE">BUFSIZE</a>,
<a class="l" name="209">    209 </a>			    <a href="/source/s?defs=gettext">gettext</a>(<span class="s">"%d bytes written"</span>), <a href="/source/s?defs=completed">completed</a>);
<a class="hl" name="210">    210 </a>
<a class="l" name="211">    211 </a>			<a href="/source/s?defs=progress_pos">progress_pos</a> = <a href="/source/s?defs=str_print">str_print</a>(s, <a href="/source/s?defs=progress_pos">progress_pos</a>);
<a class="l" name="212">    212 </a>		}
<a class="l" name="213">    213 </a>	} <b>else</b> {
<a class="l" name="214">    214 </a>		<a href="/source/s?defs=total">total</a> = (((<a href="/source/s?defs=uint64_t">uint64_t</a>)<a href="/source/s?defs=completed">completed</a>) * <span class="n">100</span>)/<a href="/source/s?defs=total">total</a>;
<a class="l" name="215">    215 </a>		<b>if</b> (<a href="/source/s?defs=total">total</a> == <a href="/source/s?defs=last_total">last_total</a>)
<a class="l" name="216">    216 </a>			<b>return</b> (<span class="n">0</span>);
<a class="l" name="217">    217 </a>		<a href="/source/s?defs=last_total">last_total</a> = <a href="/source/s?defs=total">total</a>;
<a class="l" name="218">    218 </a>		<b>if</b> (<a href="/source/s?defs=total">total</a> &gt; <span class="n">100</span>) {
<a class="l" name="219">    219 </a>			<span class="c">/* There is clearly a miscalculation somewhere */</span>
<a class="hl" name="220">    220 </a>			<b>if</b> (<a href="/source/s?defs=debug">debug</a>)
<a class="l" name="221">    221 </a>				(<b>void</b>) <a href="/source/s?defs=printf">printf</a>(<span class="s">"\nWrote more than 100 %% !!\n"</span>);
<a class="l" name="222">    222 </a>			<b>return</b> (<span class="n">0</span>);
<a class="l" name="223">    223 </a>		}
<a class="l" name="224">    224 </a>		<b>if</b> (<a href="/source/s?defs=total">total</a> == <span class="n">100</span>) {
<a class="l" name="225">    225 </a>			<span class="c">/* l10n_NOTE : 'done' as in "Writing track 1...done"  */</span>
<a class="l" name="226">    226 </a>			(<b>void</b>) <a href="/source/s?defs=snprintf">snprintf</a>(s, <a href="/source/s?defs=BUFSIZE">BUFSIZE</a>, <a href="/source/s?defs=gettext">gettext</a>(<span class="s">"done.\n"</span>));
<a class="l" name="227">    227 </a>		} <b>else</b> {
<a class="l" name="228">    228 </a>			(<b>void</b>) <a href="/source/s?defs=snprintf">snprintf</a>(s, <a href="/source/s?defs=BUFSIZE">BUFSIZE</a>, <span class="s">"%d %%"</span>, (<a href="/source/s?defs=uint_t">uint_t</a>)<a href="/source/s?defs=total">total</a>);
<a class="l" name="229">    229 </a>		}
<a class="hl" name="230">    230 </a>		<a href="/source/s?defs=progress_pos">progress_pos</a> = <a href="/source/s?defs=str_print">str_print</a>(s, <a href="/source/s?defs=progress_pos">progress_pos</a>);
<a class="l" name="231">    231 </a>	}
<a class="l" name="232">    232 </a>	<b>return</b> (<span class="n">0</span>);
<a class="l" name="233">    233 </a>}
<a class="l" name="234">    234 </a>
<a class="l" name="235">    235 </a><b>void</b>
<a class="l" name="236">    236 </a><a href="/source/s?defs=raise_priv">raise_priv</a>(<b>void</b>)
<a class="l" name="237">    237 </a>{
<a class="l" name="238">    238 </a>	<b>if</b> (<a href="/source/s?defs=priv_change_needed">priv_change_needed</a> &amp;&amp; (<a href="/source/s?defs=cur_uid">cur_uid</a> != <span class="n">0</span>)) {
<a class="l" name="239">    239 </a>		<b>if</b> (<a href="/source/s?defs=seteuid">seteuid</a>(<span class="n">0</span>) == <span class="n">0</span>)
<a class="hl" name="240">    240 </a>			<a href="/source/s?defs=cur_uid">cur_uid</a> = <span class="n">0</span>;
<a class="l" name="241">    241 </a>	}
<a class="l" name="242">    242 </a>}
<a class="l" name="243">    243 </a>
<a class="l" name="244">    244 </a><b>void</b>
<a class="l" name="245">    245 </a><a href="/source/s?defs=lower_priv">lower_priv</a>(<b>void</b>)
<a class="l" name="246">    246 </a>{
<a class="l" name="247">    247 </a>	<b>if</b> (<a href="/source/s?defs=priv_change_needed">priv_change_needed</a> &amp;&amp; (<a href="/source/s?defs=cur_uid">cur_uid</a> == <span class="n">0</span>)) {
<a class="l" name="248">    248 </a>		<b>if</b> (<a href="/source/s?defs=seteuid">seteuid</a>(<a href="/source/s?defs=ruid">ruid</a>) == <span class="n">0</span>)
<a class="l" name="249">    249 </a>			<a href="/source/s?defs=cur_uid">cur_uid</a> = <a href="/source/s?defs=ruid">ruid</a>;
<a class="hl" name="250">    250 </a>	}
<a class="l" name="251">    251 </a>}
<a class="l" name="252">    252 </a>
<a class="l" name="253">    253 </a><b>int</b>
<a class="l" name="254">    254 </a><a href="/source/s?defs=check_auth">check_auth</a>(<a href="/source/s?defs=uid_t">uid_t</a> <a href="/source/s?defs=uid">uid</a>)
<a class="l" name="255">    255 </a>{
<a class="l" name="256">    256 </a>	<b>struct</b> <a href="/source/s?defs=passwd">passwd</a> *<a href="/source/s?defs=pw">pw</a>;
<a class="l" name="257">    257 </a>
<a class="l" name="258">    258 </a>
<a class="l" name="259">    259 </a>	<a href="/source/s?defs=pw">pw</a> = <a href="/source/s?defs=getpwuid">getpwuid</a>(<a href="/source/s?defs=uid">uid</a>);
<a class="hl" name="260">    260 </a>
<a class="l" name="261">    261 </a>	<b>if</b> (<a href="/source/s?defs=pw">pw</a> == <a href="/source/s?defs=NULL">NULL</a>) {
<a class="l" name="262">    262 </a>		<span class="c">/* fail if we cannot get password entry */</span>
<a class="l" name="263">    263 </a>		<b>return</b> (<span class="n">0</span>);
<a class="l" name="264">    264 </a>	}
<a class="l" name="265">    265 </a>
<a class="l" name="266">    266 </a>	<span class="c">/*
<a class="l" name="267">    267 </a>	 * check in the RBAC authority files to see if
<a class="l" name="268">    268 </a>	 * the user has permission to use CDRW
<a class="l" name="269">    269 </a>	 */</span>
<a class="hl" name="270">    270 </a>	<b>if</b> (<a href="/source/s?defs=chkauthattr">chkauthattr</a>(<a href="/source/s?defs=CDRW_AUTH">CDRW_AUTH</a>, <a href="/source/s?defs=pw">pw</a>-&gt;<a href="/source/s?defs=pw_name">pw_name</a>) != <span class="n">1</span>) {
<a class="l" name="271">    271 </a>		<span class="c">/* user is not in database, return failure */</span>
<a class="l" name="272">    272 </a>		<b>return</b> (<span class="n">0</span>);
<a class="l" name="273">    273 </a>	} <b>else</b> {
<a class="l" name="274">    274 </a>		<b>return</b> (<span class="n">1</span>);
<a class="l" name="275">    275 </a>	}
<a class="l" name="276">    276 </a>}
<a class="l" name="277">    277 </a>
<a class="l" name="278">    278 </a><span class="c">/*
<a class="l" name="279">    279 </a> * This will busy delay in ms milliseconds. Needed for cases
<a class="hl" name="280">    280 </a> * where 1 sec wait is too long. This is needed for some newer
<a class="l" name="281">    281 </a> * drives which can empty the drive cache very quickly.
<a class="l" name="282">    282 </a> */</span>
<a class="l" name="283">    283 </a><b>void</b>
<a class="l" name="284">    284 </a><a href="/source/s?defs=ms_delay">ms_delay</a>(<a href="/source/s?defs=uint_t">uint_t</a> <a href="/source/s?defs=ms">ms</a>)
<a class="l" name="285">    285 </a>{
<a class="l" name="286">    286 </a>
<a class="l" name="287">    287 </a>	<a href="/source/s?defs=hrtime_t">hrtime_t</a> <a href="/source/s?defs=start">start</a>, <a href="/source/s?defs=req">req</a>;
<a class="l" name="288">    288 </a>
<a class="l" name="289">    289 </a>	<a href="/source/s?defs=start">start</a> = <a href="/source/s?defs=gethrtime">gethrtime</a>();
<a class="hl" name="290">    290 </a>	<a href="/source/s?defs=req">req</a> = <a href="/source/s?defs=start">start</a> + ((<a href="/source/s?defs=hrtime_t">hrtime_t</a>)<a href="/source/s?defs=ms">ms</a> * <span class="n">1000000</span>);
<a class="l" name="291">    291 </a>
<a class="l" name="292">    292 </a>	<b>while</b> (<a href="/source/s?defs=gethrtime">gethrtime</a>() &lt; <a href="/source/s?defs=req">req</a>)
<a class="l" name="293">    293 </a>		<a href="/source/s?defs=yield">yield</a>();
<a class="l" name="294">    294 </a>}
<a class="l" name="295">    295 </a></pre></div>
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