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SETSID(2)		      System Calls Manual		     SETSID(2)

NAME
       setsid -- create	session	and set	process	group ID

LIBRARY
       Standard	C Library (libc, -lc)

SYNOPSIS
       #include	<unistd.h>

       pid_t
       setsid(void);

DESCRIPTION
       The setsid() system call	creates	a new session.	The calling process is
       the session leader of the new session, is the process group leader of a
       new process group and has no controlling	terminal.  The calling process
       is the only process in either the session or the	process	group.

RETURN VALUES
       Upon  successful	completion, the	setsid() system	call returns the value
       of the process group ID of the new process group, which is the same  as
       the  process  ID	 of the	calling	process.  If an	error occurs, setsid()
       returns -1 and the global variable errno	is set to indicate the error.

ERRORS
       The setsid() system call	will fail if:

       [EPERM]		  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.

SEE ALSO
       setpgid(2), tcgetpgrp(3), tcsetpgrp(3)

STANDARDS
       The  setsid()  system call is expected to be compliant with the ISO/IEC
       9945-1:1990 ("POSIX.1") specification.

FreeBSD	13.2			 June 4, 1993			     SETSID(2)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS

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