?? readdir.html
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<title>FatFs - f_readdir</title>
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<div class="para">
<h2>f_readdir</h2>
<p>The f_readdir function reads directory entries.</p>
<pre>
FRESULT f_readdir (
DIR* <em>DirObject</em>, /* Pointer to the directory object structure */
FILINFO* <em>FileInfo</em> /* Pointer to the file information structure */
);
</pre>
</div>
<div class="para">
<h4>Parameters</h4>
<dl class="par">
<dt>DirObject</dt>
<dd>Pointer to the open directory strcture.</dd>
<dt>FileInfo</dt>
<dd>Pointer to the file information structure to store the read item.</dd>
</dl>
</div>
<div class="para">
<h4>Return Values</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>The function succeeded.</dd>
<dt>FR_NOT_READY</dt>
<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
<dt>FR_RW_ERROR</dt>
<dd>The function failed due to a disk error or an internal error.</dd>
<dt>FR_INVALID_OBJECT</dt>
<dd>The directory object is invalid.</dd>
</dl>
</div>
<div class="para">
<h4>Description</h4>
<p>The f_readdir function reads directory entries in sequence. All items in the directory can be read by calling f_readdir function repeatedly. When all directory items have been read and no item to read, the function returns a null string into <tt>f_name[]</tt> member without any error. For details of the file informations, refer to the <tt>FILINFO</tt>. This function is not supported in minimization level of >=2.</p>
</div>
<div class="para">
<h4>Sample Code</h4>
<pre>
void scan_files (char* path)
{
FILINFO finfo;
DIR dirs;
int i;
if (f_opendir(&dirs, path) == FR_OK) {
i = strlen(path);
while ((f_readdir(&dirs, &finfo) == FR_OK) && finfo.fname[0]) {
if (finfo.fattrib & AM_DIR) {
sprintf(&path[i], "/%s", &finfo.fname[0]);
scan_files(path);
path[i] = 0;
} else {
printf("%s/%s\n", path, &finfo.fname[0]);
}
}
}
}
</pre>
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<div class="para">
<h4>References</h4>
<p><tt><a href="opendir.html">f_opendir</a>, <a href="stat.html">f_stat</a>, <a href="sfileinfo.html">FILINFO</a>, <a href="sdir.html">DIR</a></tt></p>
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