.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl>
.\"
+.\" %%%LICENSE_START(VERBATIM)
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
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.\" the source, must acknowledge the copyright and authors of this work.
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-.TH TCGETSID 3 2003-01-30 "GNU" "Linux Programmer's Manual"
+.TH TCGETSID 3 2015-08-08 "GNU" "Linux Programmer's Manual"
.SH NAME
tcgetsid \- get session ID
.SH SYNOPSIS
-.sp
-.BR "#include <termios.h>"
-.sp
+.BR "#define _XOPEN_SOURCE 500" " /* See feature_test_macros(7) */"
+.br
+.B "#include <termios.h>"
+.PP
.BI "pid_t tcgetsid(int " fd );
.SH DESCRIPTION
The function
.I fd
as controlling terminal.
This terminal must be the controlling terminal of the calling process.
-.SH "RETURN VALUE"
+.SH RETURN VALUE
When
.I fd
refers to the controlling terminal of our session,
The calling process does not have a controlling terminal, or
it has one but it is not described by
.IR fd .
+.SH VERSIONS
+.BR tcgetsid ()
+is provided in glibc since version 2.1.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lb lb lb
+l l l.
+Interface Attribute Value
+T{
+.BR tcgetsid ()
+T} Thread safety MT-Safe
+.TE
+.SH CONFORMING TO
+POSIX.1-2001, POSIX.1-2008.
.SH NOTES
-This function is implemented via the TIOCGSID
+This function is implemented via the
+.B TIOCGSID
.BR ioctl (2),
present
since Linux 2.1.71.
-.SH "CONFORMING TO"
-POSIX.1-2001
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR getsid (2)