tcgetsid(3) [osx man page]

tcgetsid(3)						   BSD Library Functions Manual 					       tcgetsid(3)

NAME

     tcgetsid -- get the process group ID for the session leader for the controlling terminal

SYNOPSIS

     #include <termios.h>

     pid_t
     tcgetsid(int fildes);

DESCRIPTION

     The tcgetsid() function obtains the process group ID of the session for which the terminal specified by fildes is the controlling terminal.

RETURN VALUES

     Upon successful completion, tcgetsid() returns the process group ID associated with the terminal.	Otherwise, a value of (pid_t)-1 is
     returned and errno is set to indicate the error.

ERRORS

     The tcgetsid() function will fail if:

     [EACCES]		The fildes argument is not associated with a controlling terminal.

     [EBADF]		The fildes argument is not a valid file descriptor.

     [ENOTTY]		The file associated with fildes is not a terminal.

SEE ALSO

     getsid(2), setpgid(2), setsid(2), tcgetpgrp(3), termios(4)

STANDARDS

     The tcgetsid() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BSD
								 December 20, 2003							       BSD

tcgetsid(3C)															      tcgetsid(3C)

NAME

       tcgetsid() - get terminal session ID

SYNOPSIS

DESCRIPTION

       The  function  returns the value of the session ID of the foreground process associated with the terminal referenced by fildes.	is allowed
       from a process that is a member of a background process group (see termio(7)).

RETURN VALUE

       Upon successful completion, returns the value of the session ID of the foreground  process  associated  with  the  terminal  referenced	by
       fildes.	Otherwise, returns a value of and sets to indicate the error.

ERRORS

       If the function fails, it sets (see errno(2)) to one of the following values:

	      [EACCES]	     The  file	associated with fildes is the controlling terminal of the calling process; however, there is no foreground
			     process group defined for the controlling terminal.

	      [EBADF]	     fildes is not a valid file descriptor.

	      [ENOTTY]	     The file associated with fildes is not the controlling terminal or the calling process does not  have  a  controlling
			     terminal.

SEE ALSO

       getsid(2), setsid(2), tcgetpgrp(3C), thread_safety(5).

																      tcgetsid(3C)