ptem(7m) [opensolaris man page]

ptem(7M)							  STREAMS Modules							  ptem(7M)

NAME

       ptem - STREAMS Pseudo Terminal Emulation module

SYNOPSIS

       int ioctl(fd, I_PUSH, "ptem");

DESCRIPTION

       ptem is a STREAMS module that, when used in conjunction with a line discipline and pseudo terminal driver, emulates a terminal.

       The ptem module must be pushed (see  I_PUSH, streamio(7I)) onto the slave side of a pseudo terminal STREAM, before the ldterm(7M) module is
       pushed.

       On the write-side, the TCSETA, TCSETAF, TCSETAW, TCGETA, TCSETS, TCSETSW, TCSETSF, TCGETS, TCSBRK,  JWINSIZE,  TIOCGWINSZ,  and	TIOCSWINSZ
       termio  ioctl(2)  messages  are	processed and acknowledged. If remote mode is not in effect, ptem handles the TIOCSTI ioctl by copying the
       argument bytes into an  M_DATA message and passing it back up the read side. Regardless of the remote mode setting, ptem  acknowledges  the
       ioctl  and passes a copy of it downstream for possible further processing. A hang up (that is, stty 0) is converted to a zero length M_DATA
       message and passed downstream. Termio cflags and window row and column information are stored locally one per stream. M_DELAY messages  are
       discarded. All other messages are passed downstream unmodified.

       On  the	read-side  all messages are passed upstream unmodified with the following exceptions. All M_READ and M_DELAY messages are freed in
       both directions. A TCSBRK ioctl is converted to an M_BREAK message and  passed upstream and an acknowledgement is  returned  downstream.  A
       TIOCSIGNAL  ioctl  is  converted  into  an  M_PCSIG  message,  and passed upstream and an acknowledgement is returned downstream. Finally a
       TIOCREMOTE ioctl is converted into an M_CTL message, acknowledged, and passed upstream; the resulting mode is retained for  use	in  subse-
       quent TIOCSTI parsing.

FILES

       <sys/ptem.h>

SEE ALSO

       stty(1), ioctl(2), ldterm(7M), pckt(7M), streamio(7I), termio(7I)

       STREAMS Programming Guide

SunOS 5.11							    3 Jul 1990								  ptem(7M)

pckt(7) 						 Miscellaneous Information Manual						   pckt(7)

NAME

       pckt - Packet Mode module for STREAMS pty (pseudo-terminal)

SYNOPSIS

DESCRIPTION

       The  feature  for  STREAMS  pty devices allows the user process on the master side of the pty device to be informed of state changes in the
       pty.  To enable in the STREAMS pty device, the user process must push the module onto the master side of the pty with a call to the STREAMS
       ioctl(2) system call.  When the module is pushed onto a STREAMS pty master, certain STREAMS messages going upstream on the master side will
       get packetized so they can be subsequently retrieved by the master side with a function.

       When the user process writes data, the module passes the message unchanged downstream on to the next  module  or  driver.   When  the  user
       process	reads  data  or  when  the module receives certain STREAMS message types, it constructs a packet out of the message for forwarding
       upstream.  To construct a message packet, the module creates an message.  This message contains the original message type in the first data
       block  and  the original message in as many data blocks as needed.  The user process can then retrieve the message with a call to the func-
       tion.

       The module packetizes the following STREAMS message types:

       All other messages are passed unchanged upstream.

       If the message is an message, the module looks at the flag and takes the following actions:

	      o  If the flag is the module changes it to before creating the message and passing the message upstream.	This prevents  the  stream
		 head's read queue from being flushed by the original

	      o  If the flag is the module changes it to before creating the message and passing it upstream.  To flush the write queues properly,
		 the module also sends an message with the flag set.

	      o  If the flag is the module changes it to before creating the message and passing it upstream.  To flush the write queues properly,
		 the module also sends an message with the flag set.

AUTHOR

       was developed by HP and OSF.

SEE ALSO

       getmsg(2), ioctl(2), ptm(7), pts(7), ldterm(7), ptem(7), streamio(7).

																	   pckt(7)