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setsid(2)							     setsid(2)

NAME
       setsid - create session and set process group ID

SYNOPSIS
DESCRIPTION
       If  the	calling	 process  is not a process group leader, creates a new
       session.	 The calling process becomes the session leader	 of  this  new
       session,	 it  becomes  the process group leader of a new process group,
       and it has no controlling terminal.  The process group ID of the	 call‐
       ing process is set equal to the process ID of the calling process.  The
       calling process is the only process in the new process  group  and  the
       only process in the new session.

   Security Restrictions
       Some or all of the actions associated with this system call may require
       privileges.  See privileges(5) for more information.

RETURN VALUE
       Upon successful completion, returns the value of the new process	 group
       ID  of  the calling process.  Otherwise, it returns a value of and sets
       to indicate the error.

ERRORS
       If fails, no changes occur and (see errno(2)) is set to one of the fol‐
       lowing values:

	      The calling process is already a process group leader, or
			     the  process group ID of a process other than the
			     calling process matches the  process  ID  of  the
			     calling process.

	      The calling process does not have sufficient privileges.

AUTHOR
       was developed by HP and AT&T.

SEE ALSO
       exec(2),	 exit(2), fork(2), getpid(2), kill(2), setpgid(2), setpgrp(2),
       setpgrp3(2), signal(2), privileges(5), termio(7).

STANDARDS CONFORMANCE
								     setsid(2)

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