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| <h3 class="section">14.8 Creating Directories</h3> |
| |
| <p><a name="index-creating-a-directory-1485"></a><a name="index-directories_002c-creating-1486"></a> |
| <a name="index-mkdir-1487"></a>Directories are created with the <code>mkdir</code> function. (There is also |
| a shell command <code>mkdir</code> which does the same thing.) |
| <!-- !!! umask --> |
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| <!-- sys/stat.h --> |
| <!-- POSIX.1 --> |
| <div class="defun"> |
| — Function: int <b>mkdir</b> (<var>const char *filename, mode_t mode</var>)<var><a name="index-mkdir-1488"></a></var><br> |
| <blockquote><p>The <code>mkdir</code> function creates a new, empty directory with name |
| <var>filename</var>. |
| |
| <p>The argument <var>mode</var> specifies the file permissions for the new |
| directory file. See <a href="Permission-Bits.html#Permission-Bits">Permission Bits</a>, for more information about |
| this. |
| |
| <p>A return value of <code>0</code> indicates successful completion, and |
| <code>-1</code> indicates failure. In addition to the usual file name syntax |
| errors (see <a href="File-Name-Errors.html#File-Name-Errors">File Name Errors</a>), the following <code>errno</code> error |
| conditions are defined for this function: |
| |
| <dl> |
| <dt><code>EACCES</code><dd>Write permission is denied for the parent directory in which the new |
| directory is to be added. |
| |
| <br><dt><code>EEXIST</code><dd>A file named <var>filename</var> already exists. |
| |
| <br><dt><code>EMLINK</code><dd>The parent directory has too many links (entries). |
| |
| <p>Well-designed file systems never report this error, because they permit |
| more links than your disk could possibly hold. However, you must still |
| take account of the possibility of this error, as it could result from |
| network access to a file system on another machine. |
| |
| <br><dt><code>ENOSPC</code><dd>The file system doesn't have enough room to create the new directory. |
| |
| <br><dt><code>EROFS</code><dd>The parent directory of the directory being created is on a read-only |
| file system and cannot be modified. |
| </dl> |
| |
| <p>To use this function, your program should include the header file |
| <samp><span class="file">sys/stat.h</span></samp>. |
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