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Language Ccpp Cref Man Setsid.htm 

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<h3>SETSID(2)                  System calls                 SETSID(2)
</h3>

<h3>NAME
</h3>       setsid - creates a session and sets the process group ID

<h3>SYNOPSIS
</h3>       #include &lt;unistd.h&gt;

       pid_t setsid(void);

<h3>DESCRIPTION
</h3>       setsid()  creates  a new session if the calling process is
       not a process group leader.  The calling  process  is  the
       leader of the new session, the process group leader if the
       new process group, and has no controlling tty.   The  pro-
       cess  group ID of the calling process is set to the PID of
       the calling process.  The calling process will be the only
       process in this new process group and in this new session.

<h3>RETURN VALUE
</h3>       The process group ID of the calling process.

<h3>ERRORS
</h3>       On error, -1 will be returned.  The only error  which  can
       happen is EPERM.

<h3>CONFORMING TO
</h3>       POSIX

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<h3>SEE ALSO
</h3><p>
<a href=setpgid.htm>setpgid</a>, 
<pre>




























                           Aug 27, 1994                         1



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