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| <h3 class="section">4.56 <code>setlinebuf</code>—specify line buffering for a file or stream</h3> |
| |
| <p><a name="index-setlinebuf-265"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <stdio.h> |
| void setlinebuf(FILE *<var>fp</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>setlinebuf</code> specifies that output to the file or stream identified by |
| <var>fp</var> should be line buffered. This causes the file or stream to pass |
| on output to the host system at every newline, as well as when the |
| buffer is full, or when an input operation intervenes. |
| |
| <p><br> |
| <strong>Warnings</strong><br> |
| You may only use <code>setlinebuf</code> before performing any file operation |
| other than opening the file. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <code>setlinebuf</code> returns as per setvbuf. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| This function comes from BSD not ANSI or POSIX. |
| |
| <p>Supporting OS subroutines required: <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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