161 lines
5.5 KiB
HTML
161 lines
5.5 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>tcsetpgrp</title>
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<body bgcolor="white">
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<basefont size="3"> <a name="tcsetpgrp"></a> <a name="tag_03_769"></a><!-- tcsetpgrp -->
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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_769_01"></a>NAME</h4>
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<blockquote>tcsetpgrp - set the foreground process group ID</blockquote>
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<h4><a name="tag_03_769_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/unistd.h.html">unistd.h</a>><br>
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<br>
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int tcsetpgrp(int</tt> <i>fildes</i><tt>, pid_t</tt> <i>pgid_id</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_769_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>If the process has a controlling terminal, <i>tcsetpgrp</i>() shall set the foreground process group ID associated with the
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terminal to <i>pgid_id</i>. The application shall ensure that the file associated with <i>fildes</i> is the controlling terminal of
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the calling process and the controlling terminal is currently associated with the session of the calling process. The application
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shall ensure that the value of <i>pgid_id</i> matches a process group ID of a process in the same session as the calling
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process.</p>
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<p>Attempts to use <i>tcsetpgrp</i>() from a process which is a member of a background process group on a <i>fildes</i> associated
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with its controlling terminal shall cause the process group to be sent a SIGTTOU signal. If the calling process is blocking or
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ignoring SIGTTOU signals, the process shall be allowed to perform the operation, and no signal is sent.</p>
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</blockquote>
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<h4><a name="tag_03_769_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned and <i>errno</i> set to indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_769_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>tcsetpgrp</i>() function shall fail if:</p>
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<dl compact>
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<dt>[EBADF]</dt>
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<dd>The <i>fildes</i> argument is not a valid file descriptor.</dd>
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<dt>[EINVAL]</dt>
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<dd>This implementation does not support the value in the <i>pgid_id</i> argument.</dd>
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<dt>[ENOTTY]</dt>
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<dd>The calling process does not have a controlling terminal, or the file is not the controlling terminal, or the controlling
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terminal is no longer associated with the session of the calling process.</dd>
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<dt>[EPERM]</dt>
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<dd>The value of <i>pgid_id</i> is a value supported by the implementation, but does not match the process group ID of a process in
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the same session as the calling process.</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_769_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_769_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_769_08"></a>RATIONALE</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_769_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_769_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="tcgetpgrp.html"><i>tcgetpgrp</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/sys/types.h.html"><i><sys/types.h></i></a>, <a href="../basedefs/unistd.h.html"><i><unistd.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_769_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_769_12"></a>Issue 6</h4>
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<blockquote>
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<p>In the SYNOPSIS, the inclusion of <a href="../basedefs/sys/types.h.html"><i><sys/types.h></i></a> is no longer
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required.</p>
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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 requirement to include <a href="../basedefs/sys/types.h.html"><i><sys/types.h></i></a> has been removed. Although <a
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href="../basedefs/sys/types.h.html"><i><sys/types.h></i></a> was required for conforming implementations of previous POSIX
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specifications, it was not required for UNIX applications.</p>
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</li>
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<li>
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<p>In the DESCRIPTION and ERRORS sections, text previously conditional on _POSIX_JOB_CONTROL is now mandated. This is a FIPS
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requirement.</p>
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</li>
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</ul>
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<p>The DESCRIPTION is updated to avoid use of the term "must" for application requirements.</p>
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<p>The Open Group Corrigendum U047/4 is applied.</p>
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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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