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SETSID(2)		  FreeBSD 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() function 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() function 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() function 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() function is expected to be compliant with the	ISO/IEC
     9945-1:1990 (``POSIX.1'') specification.

FreeBSD	9.3			 June 4, 1993			   FreeBSD 9.3

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS

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