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-.\" Copyright (c) 2002 Apple Computer, Inc.  All rights reserved.
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-.\" http://www.apple.com/publicsource and read it before using this file.
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-.Dd December 20, 2003
-.Dt tcgetsid 3
-.Os
-.Sh NAME
-.Nm tcgetsid
-.Nd get the process group ID for the session leader for the controlling terminal
-.Sh SYNOPSIS
-.In termios.h
-.Ft pid_t
-.Fo tcgetsid
-.Fa "int fildes"
-.Fc
-.Sh DESCRIPTION
-The
-.Fn tcgetsid
-function obtains the process group ID of the session for which the terminal
-specified by
-.Fa fildes
-is the controlling terminal.
-.Sh RETURN VALUES
-Upon successful completion,
-.Fn tcgetsid
-returns the process group ID associated with the terminal.
-Otherwise, a value of
-.Po Vt pid_t Pc Ns -1
-is returned and
-.Va errno
-is set to indicate the error.
-.Sh ERRORS
-The
-.Fn tcgetsid
-function will fail if:
-.Bl -tag -width Er
-.It Bq Er EACCES
-The
-.Vt fildes
-argument is not associated with a controlling terminal.
-.It Bq Er EBADF
-The
-.Vt fildes
-argument is not a valid file descriptor.
-.It Bq Er ENOTTY
-The file associated with
-.Vt fildes
-is not a terminal.
-.El
-.Sh SEE ALSO
-.Xr getsid 2 ,
-.Xr setpgid 2 ,
-.Xr setsid 2 ,
-.Xr tcgetpgrp 3 ,
-.Xr termios 4
-.Sh STANDARDS
-The
-.Fn tcgetsid
-function conforms to
-.St -p1003.1-2001 .