Installation guide
The command uses as input the system configuration file that you used
to build your running kernel. The procedure runs in multiuser mode
and requires no input after it has been started. You should redirect
output to a file in order to save the summary information. Compile
errors are reported to standard error and the command terminates
when the error is reported. Warnings are reported to standard error
and do not terminate the command.
3. Edit the characteristics that are listed on the output file into the
/etc/ddr.dbase file, following the syntax requirements of that file.
Instructions for editing the /etc/ddr.dbase database are found in
ddr.dbase
(4).
4. Enter the ddr_config -c command to compile the changes.
See Section 6.2 for more information.
6.4 Adding Pseudoterminals and Devices without Using
DDR
You can add pseudodevices, disks, and tapes statically, without using DDR,
by using the methods described in the following sections.
6.4.1 Adding Pseudoterminals
Pseudoterminals enable users to use the network to access a system. A
pseudoterminal is a pair of character devices that emulates a hardware
terminal connection to the system. Instead of hardware, however, there is a
master device and a slave device. Pseudoterminals, unlike terminals, have
no corresponding physical terminal port on the system. Remote login
sessions, window-based software, and shells use pseudoterminals for access
to a system. Tru64 UNIX offers two implementations of pseudoterminals:
BSD STREAMS and BSD clist.
For some installations, the default number of pty devices is adequate.
However, as your user community grows, and each user wants to run
multiple sessions of one or more timesharing machines in your
environment, the machines may run out of available pty lines.
To add pseudoterminals to your system:
1. Log in as root.
2. Edit the pseudodevice entry in the system configuration file. By
default, the kernel supports 255 pseudoterminals. If you add more
pseudoterminals to your system, you must edit the system
configuration file entry and increment the number 255 by the number
6–4 Administering Devices with Dynamic Device Recognition