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| <h3 class="section">4.4 <code>fclose</code>—close a file</h3> |
| |
| <p><a name="index-fclose-154"></a><a name="index-g_t_005ffclose_005fr-155"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| int fclose(FILE *<var>fp</var>); |
| int _fclose_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| If the file or stream identified by <var>fp</var> is open, <code>fclose</code> closes |
| it, after first ensuring that any pending data is written (by calling |
| <code>fflush(</code><var>fp</var><code>)</code>). |
| |
| <p>The alternate function <code>_fclose_r</code> is a reentrant version. |
| The extra argument <var>reent</var> is a pointer to a reentrancy structure. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <code>fclose</code> returns <code>0</code> if successful (including when <var>fp</var> is |
| <code>NULL</code> or not an open file); otherwise, it returns <code>EOF</code>. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>fclose</code> is required by ANSI C. |
| |
| <p>Required OS subroutines: <code>close</code>, <code>fstat</code>, <code>isatty</code>, <code>lseek</code>, |
| <code>read</code>, <code>sbrk</code>, <code>write</code>. |
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