Installation manual

Customizing DECwindows Support Software
9.2 Using Compaq TCP/IP Services for OpenVMS
You can conserve memory and process slots by configuring Compaq TCP/IP
Services for OpenVMS software for the minimum DECwindows requirement to
support the X protocol. DECwindows only requires that INET_ACP be running.
DECwindows does not require that the NFS server, the FTPD server, or the
remote terminal servers be running.
For more information about TCP/IP concepts, refer to the Compaq TCP/IP
Services for OpenVMS documentation. For information about how to configure
the TCP/IP software, refer to the Compaq TCP/IP Services for OpenVMS
Installation and Configuration manual.
Documentation for Compaq TCP/IP Services for OpenVMS is included on the
OpenVMS Online Documentation CD-ROM. Hardcopy documentation must be
purchased separately.
9.3 Using Other Transports with DECwindows
DECwindows supports DECnet–Plus, local, and TCP/IP transports. However,
you can use other transports, such as new transports for layered products
and transports from third-party vendors, with DECwindows by writing a
DECwindows transport interface layer.
9.3.1 Writing a Transport Interface
For information about writing a transport interface, refer to the VMS
DECwindows Transport Manual.
The transport interface image’s file name must have the following format where
name is the unique transport name:
DECW$TRANSPORT_name (for transports supplied by Compaq)
DECW_TRANSPORT_name (for customer-written transports)
9.3.2 Installing the Transport Interface Image
Install the image as a protected image in the SYS$SHARE directory (as defined
by an executive mode logical name). Compaq recommends that you install the
image by adding the following line to SYS$MANAGER:SYSTARTUP_VMS.COM:
$ INSTALL CREATE SYS$SHARE:DECW_TRANSPORT_name/OPEN/SHARED-
/HEADER_RESIDENT/PROTECTED
You can also include this command in a startup file that SYSTARTUP_VMS calls.
To use this transport with the DECwindows server, customize the server startup
as described in Section 9.1.
9.4 Using the Example Transport
DECwindows has an example transport interface based on the Compaq TCP/IP
Services for OpenVMS layered product. It is similar to the DECwindows TCP/IP
transport interface, except it includes its own source files and it uses a different
port number (5000). You can run the example transport interface simultaneously
with the TCP/IP transport interface.
If you have installed Compaq TCP/IP Services for OpenVMS software, you can
install and use the example transport by doing the following:
1. Copy the example transport to the SYS$SHARE directory as follows:
$ COPY DECW$EXAMPLES:DECW$TRANSPORT_EXAMPLE.EXE SYS$SHARE:/PROT=W:RE
9–6 Customizing DECwindows Support Software