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.TH TCGETSID "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"

.SH 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.

.SH NAME

tcgetsid

\(em get the process group ID for the session leader for the

controlling terminal

.SH SYNOPSIS

.LP

.nf

#include <termios.h>

.P

pid_t tcgetsid(int \fIfildes\fP);

.fi

.SH DESCRIPTION

The

\fItcgetsid\fR()

function shall obtain the process group ID of the session for which the

terminal specified by

.IR fildes

is the controlling terminal.

.SH "RETURN VALUE"

Upon successful completion,

\fItcgetsid\fR()

shall return the process group ID of the session associated with the

terminal. Otherwise, a value of \(mi1 shall be returned and

.IR errno

set to indicate the error.

.SH ERRORS

The

\fItcgetsid\fR()

function shall fail if:

.TP

.BR EBADF

The

.IR fildes

argument is not a valid file descriptor.

.TP

.BR ENOTTY

The calling process does not have a controlling terminal, or the file

is not the controlling terminal.

.LP

.IR "The following sections are informative."

.SH EXAMPLES

None.

.SH "APPLICATION USAGE"

None.

.SH RATIONALE

None.

.SH "FUTURE DIRECTIONS"

None.

.SH "SEE ALSO"

The Base Definitions volume of POSIX.1\(hy2008,

.IR "\fB<termios.h>\fP"

.SH COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form

from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology

-- Portable Operating System Interface (POSIX), The Open Group Base

Specifications Issue 7, Copyright (C) 2013 by the Institute of

Electrical and Electronics Engineers, Inc and The Open Group.

(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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 .