'\" te
.\"  Copyright (c) 2002, Sun Microsystems, Inc.  All Rights Reserved  Portions Copyright (c) 1992, X/Open Company Limited  All Rights Reserved
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.TH tcgetsid 3C "14 Aug 2002" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
tcgetsid \- get process group ID for session leader for controlling terminal
.SH SYNOPSIS
.LP
.nf
#include <termios.h>

\fBpid_t\fR \fBtcgetsid\fR(\fBint\fR \fIfildes\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBtcgetsid()\fR function obtains the process group \fBID\fR of the session for which the terminal specified by \fIfildes\fR is the controlling terminal.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBtcgetsid()\fR returns the process group \fBID\fR associated with the terminal.  Otherwise, a value of \fB(pid_t)\(mi1\fR is returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBtcgetsid()\fR function will fail if:
.sp
.ne 2
.mk
.na
\fB\fBEACCES\fR\fR
.ad
.RS 10n
.rt  
The \fIfildes\fR argument is not associated with a controlling terminal.
.RE

.sp
.ne 2
.mk
.na
\fB\fBEBADF\fR\fR
.ad
.RS 10n
.rt  
The \fIfildes\fR argument is not a valid file descriptor.
.RE

.sp
.ne 2
.mk
.na
\fB\fBENOTTY\fR\fR
.ad
.RS 10n
.rt  
The file associated with \fIfildes\fR is not a terminal.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
_
StandardSee \fBstandards\fR(5).
.TE

.SH SEE ALSO
.sp
.LP
\fBattributes\fR(5), \fBstandards\fR(5), \fBtermio\fR(7I)