ptem(7)


ptem -- STREAMS pseudo-terminal emulation module

Description

ptem is a STREAMS module that when used in conjunction with a line discipline and pseudo terminal driver emulates a terminal. See pseudo(1).

The ptem module must be pushed [see I_PUSH, streamio(7)] onto the slave side of a pseudo terminal STREAM, before the ldterm 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. A hang up (such as stty 0) is converted to a zero length M_DATA message and passed downstream. termio cflags 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. An ioctl TCSBRK is converted to an M_BREAK(D7str) message and passed upstream and an acknowledgement is returned downstream. An ioctl TIOCSIGNAL is converted into an M_PCSIG(D7str) message, and passed upstream and an acknowledgement is returned downstream. Finally an ioctl TIOCREMOTE is converted into an M_CTL(D7str) message, acknowledged, and passed upstream.

References

crash(1M), ioctl(2), ldterm(7), pckt(7), pseudo(1), pty(7), streamio(7), stty(1), termio(7)


© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004