Multi process programming in C Post: 302895080

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setsid

setsid(2)							System Calls Manual							 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 following 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)