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| <div class="section" id="fsutil-write-file"> |
| <h1>fsutil_write_file<a class="headerlink" href="#fsutil-write-file" 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">fsutil_write_file</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">path</span><span class="p">,</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">len</span><span class="p">)</span> |
| </pre></div> |
| </div> |
| <p>Calls fs_open(), fs_write(), and fs_close() to open a file at the |
| specified path, write the supplied data to the current offset of the |
| specified file handle, and close the file and invalidate the file |
| handle. If the specified file already exists, it is truncated and |
| overwritten with the specified data.</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: 29%" /> |
| <col style="width: 71%" /> |
| </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>path</p></td> |
| <td><p>Pointer to the file to write to</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>data</p></td> |
| <td><p>The data to write</p></td> |
| </tr> |
| <tr class="row-even"><td><p>len</p></td> |
| <td><p>The number of bytes to write</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="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>This example creates a 4-byte file.</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span> |
| <span class="nf">write_id</span><span class="p">(</span><span class="kt">void</span><span class="p">)</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">/* Create the parent directory. */</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_mkdir</span><span class="p">(</span><span class="s">"/cfg"</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="w"> </span><span class="o">&&</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_EEXIST</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">/* Create a file and write four bytes to it. */</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">fsutil_write_file</span><span class="p">(</span><span class="s">"/cfg/id.txt"</span><span class="p">,</span><span class="w"> </span><span class="s">"1234"</span><span class="p">,</span><span class="w"> </span><span class="mi">4</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="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span> |
| <span class="p">}</span> |
| </pre></div> |
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