termios.h.html

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<dt>VT1</dt>

<dd>Vertical-tab delay type 1.</dd>
</dl>
</dd>

<dt>FFDLY</dt>

<dd>Select form-feed delays: 

<dl compact>
<dt>FF0</dt>

<dd>Form-feed delay type 0.</dd>

<dt>FF1</dt>

<dd>Form-feed delay type 1. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></dd>
</dl>
</dd>
</dl>

<h5><a name="tag_13_74_03_04"></a>Baud Rate Selection</h5>

<p>The input and output baud rates are stored in the <b>termios</b> structure. These are the valid values for objects of type
<b>speed_t</b>. The following values shall be defined, but not all baud rates need be supported by the underlying hardware.</p>

<dl compact>
<dt>B0</dt>

<dd>Hang up</dd>

<dt>B50</dt>

<dd>50 baud</dd>

<dt>B75</dt>

<dd>75 baud</dd>

<dt>B110</dt>

<dd>110 baud</dd>

<dt>B134</dt>

<dd>134.5 baud</dd>

<dt>B150</dt>

<dd>150 baud</dd>

<dt>B200</dt>

<dd>200 baud</dd>

<dt>B300</dt>

<dd>300 baud</dd>

<dt>B600</dt>

<dd>600 baud</dd>

<dt>B1200</dt>

<dd>1200 baud</dd>

<dt>B1800</dt>

<dd>1800 baud</dd>

<dt>B2400</dt>

<dd>2400 baud</dd>

<dt>B4800</dt>

<dd>4800 baud</dd>

<dt>B9600</dt>

<dd>9600 baud</dd>

<dt>B19200</dt>

<dd>19200 baud</dd>

<dt>B38400</dt>

<dd>38400 baud</dd>
</dl>

<h5><a name="tag_13_74_03_05"></a>Control Modes</h5>

<p>The <i>c_cflag</i> field describes the hardware control of the terminal; not all values specified are required to be supported
by the underlying hardware:</p>

<dl compact>
<dt>CSIZE</dt>

<dd>Character size: 

<dl compact>
<dt>CS5</dt>

<dd>5 bits</dd>

<dt>CS6</dt>

<dd>6 bits</dd>

<dt>CS7</dt>

<dd>7 bits</dd>

<dt>CS8</dt>

<dd>8 bits</dd>
</dl>
</dd>

<dt>CSTOPB</dt>

<dd>Send two stop bits, else one.</dd>

<dt>CREAD</dt>

<dd>Enable receiver.</dd>

<dt>PARENB</dt>

<dd>Parity enable.</dd>

<dt>PARODD</dt>

<dd>Odd parity, else even.</dd>

<dt>HUPCL</dt>

<dd>Hang up on last close.</dd>

<dt>CLOCAL</dt>

<dd>Ignore modem status lines.</dd>
</dl>

<p>The implementation shall support the functionality associated with the symbols CS7, CS8, CSTOPB, PARODD, and PARENB.</p>

<h5><a name="tag_13_74_03_06"></a>Local Modes</h5>

<p>The <i>c_lflag</i> field of the argument structure is used to control various terminal functions:</p>

<dl compact>
<dt>ECHO</dt>

<dd>Enable echo.</dd>

<dt>ECHOE</dt>

<dd>Echo erase character as error-correcting backspace.</dd>

<dt>ECHOK</dt>

<dd>Echo KILL.</dd>

<dt>ECHONL</dt>

<dd>Echo NL.</dd>

<dt>ICANON</dt>

<dd>Canonical input (erase and kill processing).</dd>

<dt>IEXTEN</dt>

<dd>Enable extended input character processing.</dd>

<dt>ISIG</dt>

<dd>Enable signals.</dd>

<dt>NOFLSH</dt>

<dd>Disable flush after interrupt or quit.</dd>

<dt>TOSTOP</dt>

<dd>Send SIGTTOU for background output.</dd>
</dl>

<h5><a name="tag_13_74_03_07"></a>Attribute Selection</h5>

<p>The following symbolic constants for use with <a href="../functions/tcsetattr.html"><i>tcsetattr</i>()</a> are defined:</p>

<dl compact>
<dt>TCSANOW</dt>

<dd>Change attributes immediately.</dd>

<dt>TCSADRAIN</dt>

<dd>Change attributes when output has drained.</dd>

<dt>TCSAFLUSH</dt>

<dd>Change attributes when output has drained; also flush pending input.</dd>
</dl>

<h5><a name="tag_13_74_03_08"></a>Line Control</h5>

<p>The following symbolic constants for use with <a href="../functions/tcflush.html"><i>tcflush</i>()</a> shall be defined:</p>

<dl compact>
<dt>TCIFLUSH</dt>

<dd>Flush pending input.</dd>

<dt>TCIOFLUSH</dt>

<dd>Flush both pending input and untransmitted output.</dd>

<dt>TCOFLUSH</dt>

<dd>Flush untransmitted output.</dd>
</dl>

<p>The following symbolic constants for use with <a href="../functions/tcflow.html"><i>tcflow</i>()</a> shall be defined:</p>

<dl compact>
<dt>TCIOFF</dt>

<dd>Transmit a STOP character, intended to suspend input data.</dd>

<dt>TCION</dt>

<dd>Transmit a START character, intended to restart input data.</dd>

<dt>TCOOFF</dt>

<dd>Suspend output.</dd>

<dt>TCOON</dt>

<dd>Restart output.</dd>
</dl>

<p>The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.</p>

<pre>
<tt>speed_t cfgetispeed(const struct termios *);
speed_t cfgetospeed(const struct termios *);
int     cfsetispeed(struct termios *, speed_t);
int     cfsetospeed(struct termios *, speed_t);
int     tcdrain(int);
int     tcflow(int, int);
int     tcflush(int, int);
int     tcgetattr(int, struct termios *);
<sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup><img src="../images/opt-start.gif" alt="[Option Start]" border="0">
pid_t   tcgetsid(int);
<img src="../images/opt-end.gif" alt="[Option End]" border="0">
int     tcsendbreak(int, int);
int     tcsetattr(int, int, const struct termios *);
</tt>
</pre>
</blockquote>

<hr>
<div class="box"><em>The following sections are informative.</em></div>

<h4><a name="tag_13_74_04"></a>APPLICATION USAGE</h4>

<blockquote>
<p>The following names are reserved for XSI-conformant systems to use as an extension to the above; therefore strictly conforming
applications shall not use them:</p>

<table cellpadding="3">
<tr valign="top">
<td align="left">
<p class="tent">CBAUD</p>
</td>
<td align="left">
<p class="tent">EXTB</p>
</td>
<td align="left">
<p class="tent">VDSUSP</p>
</td>
</tr>

<tr valign="top">
<td align="left">
<p class="tent">DEFECHO</p>
</td>
<td align="left">
<p class="tent">FLUSHO</p>
</td>
<td align="left">
<p class="tent">VLNEXT</p>
</td>
</tr>

<tr valign="top">
<td align="left">
<p class="tent">ECHOCTL</p>
</td>
<td align="left">
<p class="tent">LOBLK</p>
</td>
<td align="left">
<p class="tent">VREPRINT</p>
</td>
</tr>

<tr valign="top">
<td align="left">
<p class="tent">ECHOKE</p>
</td>
<td align="left">
<p class="tent">PENDIN</p>
</td>
<td align="left">
<p class="tent">VSTATUS</p>
</td>
</tr>

<tr valign="top">
<td align="left">
<p class="tent">ECHOPRT</p>
</td>
<td align="left">
<p class="tent">SWTCH</p>
</td>
<td align="left">
<p class="tent">VWERASE</p>
</td>
</tr>

<tr valign="top">
<td align="left">
<p class="tent">EXTA</p>
</td>
<td align="left">
<p class="tent">VDISCARD</p>
</td>
<td align="left">
<p class="tent">&nbsp;</p>
</td>
</tr>
</table>
</blockquote>

<h4><a name="tag_13_74_05"></a>RATIONALE</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_74_06"></a>FUTURE DIRECTIONS</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_74_07"></a>SEE ALSO</h4>

<blockquote>
<p>The System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../functions/cfgetispeed.html"><i>cfgetispeed</i>()</a>, <a href="../functions/cfgetospeed.html"><i>cfgetospeed</i>()</a>, <a
href="../functions/cfsetispeed.html"><i>cfsetispeed</i>()</a>, <a href="../functions/cfsetospeed.html"><i>cfsetospeed</i>()</a>, <a
href="../functions/confstr.html"><i>confstr</i>()</a>, <a href="../functions/tcdrain.html"><i>tcdrain</i>()</a>, <a href=
"../functions/tcflow.html"><i>tcflow</i>()</a>, <a href="../functions/tcflush.html"><i>tcflush</i>()</a>, <a href=
"../functions/tcgetattr.html"><i>tcgetattr</i>()</a>, <a href="../functions/tcgetsid.html"><i>tcgetsid</i>()</a>, <a href=
"../functions/tcsendbreak.html"><i>tcsendbreak</i>()</a>, <a href="../functions/tcsetattr.html"><i>tcsetattr</i>()</a>, the Shell
and Utilities volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href="../utilities/getconf.html"><i>getconf</i></a>, <a href=
"xbd_chap11.html#tag_11"><i>General Terminal Interface</i></a></p>
</blockquote>

<h4><a name="tag_13_74_08"></a>CHANGE HISTORY</h4>

<blockquote>
<p>First released in Issue 3.</p>

<p>Included for alignment with the ISO&nbsp;POSIX-1 standard.</p>
</blockquote>

<h4><a name="tag_13_74_09"></a>Issue 6</h4>

<blockquote>
<p>The LEGACY symbols IUCLC, OLCUC, and XCASE are removed.</p>

<p>FIPS 151-2 requirements for the symbols CS7, CS8, CSTOPB, PARODD, and PARENB are reaffirmed.</p>

<p>IEEE&nbsp;Std 1003.1-2001/Cor&nbsp;1-2002, item XBD/TC1/D6/19 is applied, changing ECHOK to ECHOKE in the APPLICATION USAGE
section.</p>
</blockquote>

<div class="box"><em>End of informative text.</em></div>

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