netbsd man page for tcgetsid

TCGETSID(3)						   BSD Library Functions Manual 					       TCGETSID(3)

NAME
     tcgetsid -- get session ID associated with a controlling terminal

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <unistd.h>

     pid_t
     tcgetsid(int fd);

DESCRIPTION
     The tcgetsid function returns the value of the session ID associated with the specified controlling terminal device.  The session ID is
     defined as the process group ID of the session leader.

ERRORS
     If an error occurs, tcgetsid returns -1 and the global variable errno is set to indicate the error, as follows:

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

     [ENOTTY]		The calling process does not have a controlling terminal or the underlying terminal device represented by fd is not the
			controlling terminal.

SEE ALSO
     getsid(2), setsid(2), tcgetpgrp(3)

STANDARDS
     The tcgetsid function conforms to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').

BSD
								 February 13, 1998							       BSD