Page 415, below line 13907, add:

	int tcsetsid(int, pid_t);

Page 416, line 13924, add reference to tcgetsid().

Add new article for tcsetsid():

NAME

	tcsetsid - set the process group ID for the session leader for
	           the controlling terminal

SYNPOSIS

	#include <termios.h>

	int tcsetsid(int fildes, pid_t pid);

DESCRIPTION

	The tcsetsid() function shall set the process ID of the session
	leader associated with the terminal to sid.  The application
	shall ensure that the file associated with fildes is a terminal
	that is not already associated with a session leader.  The
	application shall ensure that the value of pid matches the
	process ID of the calling process.  This process must also be a
	session leader.

RETURN VALUE

	Upon successful completion, 0 shall be returned. Otherwise, -1
	shall be returned and errno set to indicate the error.

ERRORS

	The tcsetsid() function shall fail if:

	[EBADF]
		The fildes argument is not a valid file descriptor.
	[ENOTTY]
		The file associated with fildes is not a terminal.
	[EPERM]
		The value of sid does not match the process ID of the
		calling process.

RATIONALE

	By enforcing that pid must match the process ID of the calling
	process, this function can be implemented on top of the
	TIOCSCTTY ioctl() present in some implementations, while still
	permitting extensions in future versions of the standard.

	On implementations supporting the TIOCSCTTY ioctl(), the
	tcsetsid() function can simply be implemented as follows:

	#include <termios.h>
	int tcsetsid(int fildes, pid_t pid)
	{
		if (pid != getpid()) {
			errno = EPERM;
			return -1;
		}
		return ioctl(fildes, TIOCSCTTY);
	}