'\" te
.\"  Copyright 1989 AT&T
.\" Copyright (C) 1999, Sun Microsystems, Inc. All Rights Reserved
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.TH ptem 7M "3 Jul 1990" "SunOS 5.11" "STREAMS Modules"
.SH NAME
ptem \- STREAMS Pseudo Terminal Emulation module
.SH SYNOPSIS
.LP
.nf
\fBint ioctl(\fR\fIfd\fR, \fBI_PUSH\fR,\fB "ptem");\fR
.fi

.SH DESCRIPTION
.sp
.LP
\fBptem\fR is a STREAMS module that, when used in conjunction with a line
discipline and pseudo terminal driver, emulates a terminal.
.sp
.LP
The \fBptem\fR module must be pushed (see  \fBI_PUSH\fR, \fBstreamio\fR(7I))
onto the slave side of a pseudo terminal STREAM, before the \fBldterm\fR(7M)
module is pushed.
.sp
.LP
On the write-side, the \fBTCSETA\fR, \fBTCSETAF\fR, \fBTCSETAW\fR,
\fBTCGETA\fR, \fBTCSETS\fR, \fBTCSETSW\fR, \fBTCSETSF\fR, \fBTCGETS\fR,
\fBTCSBRK\fR, \fBJWINSIZE\fR, \fBTIOCGWINSZ\fR, and \fBTIOCSWINSZ\fR
\fBtermio\fR \fBioctl\fR(2) messages are processed and acknowledged. If remote
mode is not in effect, \fBptem\fR handles the \fBTIOCSTI\fR ioctl by copying
the argument bytes into an  \fBM_DATA\fR message and passing it back up the
read side. Regardless of the remote mode setting, \fBptem\fR acknowledges the
ioctl and passes a copy of it downstream for possible further processing. A
hang up (that is, \fBstty 0\fR) is converted to a zero length \fBM_DATA\fR
message and passed downstream. Termio \fBcflags\fR and window row and column
information are stored locally one per stream. \fBM_DELAY\fR messages are
discarded. All other messages are passed downstream unmodified.
.sp
.LP
On the read-side all messages are passed upstream unmodified with the following
exceptions. All \fBM_READ\fR and \fBM_DELAY\fR messages are freed in both
directions. A \fBTCSBRK\fR ioctl is converted to an \fBM_BREAK\fR message and
passed upstream and an acknowledgement is returned downstream. A
\fBTIOCSIGNAL\fR ioctl is converted into an \fBM_PCSIG\fR message,  and passed
upstream and an acknowledgement is returned downstream. Finally a
\fBTIOCREMOTE\fR ioctl is converted into an \fBM_CTL\fR message, acknowledged,
and passed upstream; the resulting mode is retained for use in subsequent
\fBTIOCSTI\fR parsing.
.SH FILES
.sp
.ne 2
.mk
.na
\fB<\fBsys/ptem.h\fR> \fR
.ad
.RS 17n
.rt  

.RE

.SH SEE ALSO
.sp
.LP
\fBstty\fR(1), \fBioctl\fR(2), \fBldterm\fR(7M), \fBpckt\fR(7M),
\fBstreamio\fR(7I), \fBtermio\fR(7I)
.sp
.LP
\fISTREAMS Programming Guide\fR