TCGETSID
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
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 shall obtain the process group ID of the session for which the
terminal specified by
fildes
is the controlling terminal.
RETURN VALUE
Upon successful completion,
tcgetsid()
shall return the process group ID of the session associated with the
terminal. Otherwise, a value of -1 shall be returned and
errno
set to indicate the error.
ERRORS
The
tcgetsid()
function shall fail if:
- EBADF
-
The
fildes
argument is not a valid file descriptor.
- ENOTTY
-
The calling process does not have a controlling terminal, or the file
is not the controlling terminal.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
The Base Definitions volume of POSIX.1-2017,
<termios.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
In the event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear
in this page are most likely
to have been introduced during the conversion of the source files to
man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .