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| <h4 class="subsection">17.4.5 Output Modes</h4> |
| |
| <p>This section describes the terminal flags and fields that control how |
| output characters are translated and padded for display. All of these |
| are contained in the <code>c_oflag</code> member of the <code>struct termios</code><!-- /@w --> |
| structure. |
| |
| <p>The <code>c_oflag</code> member itself is an integer, and you change the flags |
| and fields using the operators <code>&</code>, <code>|</code>, and <code>^</code>. Don't |
| try to specify the entire value for <code>c_oflag</code>—instead, change |
| only specific flags and leave the rest untouched (see <a href="Setting-Modes.html#Setting-Modes">Setting Modes</a>). |
| |
| <!-- termios.h --> |
| <!-- POSIX.1 --> |
| <div class="defun"> |
| — Macro: tcflag_t <b>OPOST</b><var><a name="index-OPOST-1884"></a></var><br> |
| <blockquote><p>If this bit is set, output data is processed in some unspecified way so |
| that it is displayed appropriately on the terminal device. This |
| typically includes mapping newline characters (<code>'\n'</code>) onto |
| carriage return and linefeed pairs. |
| |
| <p>If this bit isn't set, the characters are transmitted as-is. |
| </p></blockquote></div> |
| |
| <p>The following three bits are BSD features, and they exist only BSD |
| systems and the GNU system. They are effective only if <code>OPOST</code> is |
| set. |
| |
| <!-- termios.h --> |
| <!-- BSD --> |
| <div class="defun"> |
| — Macro: tcflag_t <b>ONLCR</b><var><a name="index-ONLCR-1885"></a></var><br> |
| <blockquote><p>If this bit is set, convert the newline character on output into a pair |
| of characters, carriage return followed by linefeed. |
| </p></blockquote></div> |
| |
| <!-- termios.h --> |
| <!-- BSD --> |
| <div class="defun"> |
| — Macro: tcflag_t <b>OXTABS</b><var><a name="index-OXTABS-1886"></a></var><br> |
| <blockquote><p>If this bit is set, convert tab characters on output into the appropriate |
| number of spaces to emulate a tab stop every eight columns. |
| </p></blockquote></div> |
| |
| <!-- termios.h --> |
| <!-- BSD --> |
| <div class="defun"> |
| — Macro: tcflag_t <b>ONOEOT</b><var><a name="index-ONOEOT-1887"></a></var><br> |
| <blockquote><p>If this bit is set, discard <kbd>C-d</kbd> characters (code <code>004</code>) on |
| output. These characters cause many dial-up terminals to disconnect. |
| </p></blockquote></div> |
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