hpnptyd(1M)
hpnptyd --
HP network peripheral pty daemon
Synopsis
/usr/lib/hpnp/hpnptyd -m master_pty -x peripheral [-fk] [-p port]
-t [ timeout ] [-l logfile]
Description
hpnptyd provides a network connection between a pseudo terminal
(pty) and an HP network peripheral. A daemon process is
invoked for each network connection. To an application, operating on a pty
has the appearance of operating on a local serial port.
hpnptyd opens the network connection when there is data from the
pty. It sends data from the pty to the peripheral over the network
connection and it passes data from the peripheral back to the pty.
hpnptyd closes the network connection after a period when there
is no more data from the pty or the network peripheral, and all the pty
data has been sent to the network peripheral. The length of the inactivity
period can be specified using -t timeout.
It is possible to use /etc/rc to start hpnptyd at
boot-up. When using hpnptyd, the print scheduler must be started
after starting the pty daemons.
Options
hpnptyd accepts the following options:
-f-
Run in the foreground. Normally, hpnptyd runs in the background.
-k-
Keep the network connection open. This option can be used in conjunction with
the SIGHUP signal to control externally when the network connection
is closed down. After the network connection is closed, new data from the pty
will cause the connection to be re-opened.
-l logfile-
Send verbose logging messages to file logfile. The logging messages
detail what hpnptyd is doing. Included in the messages are
how many bytes are read and written to the pty and to the network connection.
hpnptyd performs no logging if this option is omitted.
-m master_pty-
Specify master_pty as the master (controller) pty for a network
connection. For each master pty, there will be a corresponding slave pty;
application programs interface to the slave pty. The naming conventions for
ptys is given in the ``Files'' section.
-p port-
Specify port as the TCP/IP port number for a network
connection. The default port number is 9100.
-t [ timeout ]-
Specify timeout as the timeout period for a network connection.
If there is no data from the pty or from the network peripheral for timeout
seconds and all the data read so far has been written to the network
peripheral, the network connection is closed. New data from the pty causes
the network connection to be re-opened. The default timeout is 30 seconds.
A timeout of 0 is not allowed.
-x peripheral-
Specify peripheral as the peripheral for printing. This may be a
host name or dotted decimal Internet address.
Signal handling
These signals have the specified effect when sent to hpnptyd
using
kill(1):
SIGHUP-
Causes hpnptyd to close the network connection after a timeout
interval when there has been no activity between the pty and network
peripheral.
SIGUSR1-
Turns on logging. hpnptyd appends the log file if it was specified.
Otherwise, it writes to /usr/tmp/hpnptyd.PID.
SIGUSR2-
Turns off logging.
Files
/dev/pty[pqr][0-9]-
master pseudo terminals
/dev/tty[pqr][0-9]-
slave pseudo terminals
/usr/tmp/hpnptyd.PID-
default log file name
Usage
The print job is not re-sent if the peripheral is power cycled while the
job is printing. Also, if the print job is small, the application may
complete sending before the print job is printed. The print job may
be buffered at the pty or at hpnptyd waiting to be sent to the
peripheral.
References
hpnpcfg(1M),
hpnpf(1M),
hpnpf(1M)
Examples
To start up a single network connection from pty /dev/ptypa
to peripheral remhost:
/usr/lib/hpnp/hpnptyd -m /dev/ptyp18 -x remhost
To send the contents of file plot1 over the network connection in
the previous example:
cat plot1 > /dev/ttyp18
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004