tcgetsid(3) - NetBSD Manual Pages

TCGETSID(3)             NetBSD Library Functions Manual            TCGETSID(3)


NAME

     tcgetsid -- get session ID associated with a controlling terminal


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <termios.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 termi-
                        nal 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'').

NetBSD 10.99                   December 19, 2019                  NetBSD 10.99