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| <div class="section" id="fs-close"> |
| <h1>fs_close<a class="headerlink" href="#fs-close" title="Permalink to this headline">¶</a></h1> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="n">fs_close</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">fs_file</span><span class="w"> </span><span class="o">*</span><span class="n">file</span><span class="p">)</span> |
| </pre></div> |
| </div> |
| <p>Closes the specified file and invalidates the file handle.</p> |
| <div class="section" id="arguments"> |
| <h2>Arguments<a class="headerlink" href="#arguments" title="Permalink to this headline">¶</a></h2> |
| <table class="docutils align-default"> |
| <colgroup> |
| <col style="width: 30%" /> |
| <col style="width: 70%" /> |
| </colgroup> |
| <thead> |
| <tr class="row-odd"><th class="head"><p><em>Argument</em></p></th> |
| <th class="head"><p><em>Description</em></p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>file</p></td> |
| <td><p>Pointer to the file to close</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="returned-values"> |
| <h2>Returned values<a class="headerlink" href="#returned-values" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li><p>0 on success</p></li> |
| <li><p><a class="reference external" href="fs_return_codes.html">FS error code</a> on failure</p></li> |
| </ul> |
| </div> |
| <div class="section" id="notes"> |
| <h2>Notes<a class="headerlink" href="#notes" title="Permalink to this headline">¶</a></h2> |
| <p>If the file has already been unlinked, and the file has no other open |
| handles, the <code class="docutils literal notranslate"><span class="pre">fs_close()</span></code> function causes the file to be deleted from |
| the disk.</p> |
| </div> |
| <div class="section" id="header-file"> |
| <h2>Header file<a class="headerlink" href="#header-file" title="Permalink to this headline">¶</a></h2> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#include</span><span class="w"> </span><span class="cpf">"fs/fs.h"</span> |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="example"> |
| <h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2> |
| <p>The below code opens the file <code class="docutils literal notranslate"><span class="pre">/settings/config.txt</span></code> for reading, |
| reads some data, and then closes the file.</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span> |
| <span class="nf">read_config</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> |
| <span class="p">{</span> |
| <span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">fs_file</span><span class="w"> </span><span class="o">*</span><span class="n">file</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">bytes_read</span><span class="p">;</span> |
| <span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">buf</span><span class="p">[</span><span class="mi">16</span><span class="p">];</span> |
| <span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">rc</span><span class="p">;</span> |
| |
| <span class="w"> </span><span class="cm">/* Open the file for reading. */</span> |
| <span class="w"> </span><span class="n">rc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">fs_open</span><span class="p">(</span><span class="s">"/settings/config.txt"</span><span class="p">,</span><span class="w"> </span><span class="n">FS_ACCESS_READ</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">file</span><span class="p">);</span> |
| <span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">rc</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span> |
| <span class="w"> </span><span class="p">}</span> |
| |
| <span class="w"> </span><span class="cm">/* Read up to 16 bytes from the file. */</span> |
| <span class="w"> </span><span class="n">rc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">fs_read</span><span class="p">(</span><span class="n">file</span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="w"> </span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">bytes_read</span><span class="p">);</span> |
| <span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">rc</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="cm">/* buf now contains up to 16 bytes of file data. */</span> |
| <span class="w"> </span><span class="n">console_printf</span><span class="p">(</span><span class="s">"read %u bytes</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">bytes_read</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">}</span> |
| |
| <span class="w"> </span><span class="cm">/* Close the file. */</span> |
| <span class="w"> </span><span class="n">fs_close</span><span class="p">(</span><span class="n">file</span><span class="p">);</span> |
| |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">rc</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">?</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="mi">-1</span><span class="p">;</span> |
| <span class="p">}</span> |
| </pre></div> |
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