139 lines
4.4 KiB
HTML
139 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>cfsetospeed</title>
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<body bgcolor="white">
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<basefont size="3"> <a name="cfsetospeed"></a> <a name="tag_03_68"></a><!-- cfsetospeed -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_68_01"></a>NAME</h4>
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<blockquote>cfsetospeed - set output baud rate</blockquote>
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<h4><a name="tag_03_68_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/termios.h.html">termios.h</a>><br>
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<br>
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int cfsetospeed(struct termios *</tt><i>termios_p</i><tt>, speed_t</tt> <i>speed</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_68_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>cfsetospeed</i>() function shall set the output baud rate stored in the structure pointed to by <i>termios_p</i> to
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<i>speed</i>.</p>
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<p>There shall be no effect on the baud rates set in the hardware until a subsequent successful call to <a href=
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"../functions/tcsetattr.html"><i>tcsetattr</i>()</a> with the same <b>termios</b> structure. Similarly, errors resulting from
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attempts to set baud rates not supported by the terminal device need not be detected until the <a href=
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"../functions/tcsetattr.html"><i>tcsetattr</i>()</a> function is called.</p>
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</blockquote>
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<h4><a name="tag_03_68_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, <i>cfsetospeed</i>() shall return 0; otherwise, it shall return -1 and <i>errno</i> may be set to
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indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_68_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>cfsetospeed</i>() function may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The <i>speed</i> value is not a valid baud rate.</dd>
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<dt>[EINVAL]</dt>
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<dd>The value of <i>speed</i> is outside the range of possible speed values as specified in <a href=
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"../basedefs/termios.h.html"><i><termios.h></i></a>.</dd>
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</dl>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_68_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_68_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_68_08"></a>RATIONALE</h4>
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<blockquote>
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<p>Refer to <a href="cfgetispeed.html"><i>cfgetispeed</i>()</a> .</p>
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</blockquote>
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<h4><a name="tag_03_68_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_68_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="cfgetispeed.html"><i>cfgetispeed</i>()</a> , <a href="cfgetospeed.html"><i>cfgetospeed</i>()</a> , <a href=
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"cfsetispeed.html"><i>cfsetispeed</i>()</a> , <a href="tcsetattr.html"><i>tcsetattr</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap11.html#tag_11">Chapter 11, General Terminal Interface</a>, <a href=
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"../basedefs/termios.h.html"><i><termios.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_68_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 3. Included for alignment with the POSIX.1-1988 standard.</p>
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</blockquote>
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<h4><a name="tag_03_68_12"></a>Issue 6</h4>
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<blockquote>
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<p>The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:</p>
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<ul>
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<li>
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<p>The optional setting of <i>errno</i> and the [EINVAL] error conditions are added.</p>
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</li>
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</ul>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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