12-28-2009
What exactly do you need?
And while we're at it, there was an almost identical thread 4 days ago, so maybe you want to coordinate with your colleagues better.
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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)