screen]"
This option is ignored for managed proxy servers.
The default is /DISPLAY=DECW$DISPLAY.
/FIXED_SERVER
/NOFIXED_SERVER
Specifies that the proxy server should fail to start if the server
number specified by the /SERVER qualifier is not available. See /SERVER
qualifier for more information about server numbers. This option is
useful for starting standalone servers as detached processes. In this
case, the proxy server has no method to return the selected server
number. This option is ignored for managed proxy servers.
The default is /NOFIXED_SERVER.
/MAXSERVER=value
Specifies the maximum number of X servers to which this proxy server
can connect. This option is ignored for standalone servers. Specify a
value from 1 to 63.
The default is /MAXSERVER=20.
/MOTION=value
Specifies the maximum number of pointer motion events that are allowed
to remain unanswered between the proxy server and the X server. Specify
a value from 1 to 32767.
The default is /MOTION=8.
/ONERROR={RECONNECT | TERMINATE}
Specifies the action taken when the proxy server encounters an internal
error. This usually occurs when the proxy server loses its connection
to the X server.
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RECONNECT
|
Specifies that the proxy server should clean up its internal state
information and await further requests. If the proxy server is a
standalone server, this option also specifies that the proxy server
should reconnect to the X server. For managed proxy servers with
multiple connected X servers, the proxy server will try to reconnect
each server connection when it fails.
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|
TERMINATE
|
Specifies that the proxy server should exit. For managed proxy servers
with multiple connected X servers, the proxy server will terminate only
if all X server connections fail.
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The default is /ONERROR=TERMINATE.
/ONEXIT={NOACTION | RESET | TERMINATE}
Specifies the action taken by this proxy server when the last client
exits.
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NOACTION
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Specifies that the proxy server should continue running.
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RESET
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Specifies that the proxy server should clean up its internal state
information and await further requests. If the proxy server is a
standalone server, this option also specifies that the proxy server
should reconnect to the X server.
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TERMINATE
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Specifies that the proxy server should exit.
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The default is /ONEXIT=NOACTION.
/OPTIONS=(option-list)
Specifies the optimizations to use for this proxy server. With the
exception of ALL and NONE, each option has a NOoption form
that disables the option. To enable a small number of options, use a
combination of the NONE and the desired options. For example,
/OPTIONS=(NONE,IMAGE) suppresses all optimization with the exception of
image compression. To disable a small number of options, use a
combination of the ALL and the undesired options. For example,
/OPTIONS=(ALL,NOIMAGE,NOGRAPHICS) suppresses image and graphics
optimization.
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ALL
|
Enables all optimizations. The ALL and NONE options are mutually
exclusive.
|
|
NONE
|
Disables all optimizations. The ALL and NONE options are mutually
exclusive.
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[NO]ATOMS
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Enables [disables] reading of the atoms control file. The NOATOMS
option is mutually exclusive with the /ATOMS qualifier.
|
|
[NO]GRABCMAP
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Enables [disables] color map grabbing.
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|
[NO]COMP
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Enables [disables] stream compression.
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|
[NO]DELTA
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Enables [disables] delta request substitutions.
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|
[NO]GRAPHICS
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Enables [disables] reencoding of graphics requests (other than
image-related requests).
|
|
[NO]IMAGE
|
Enables [disables] image compression.
|
|
[NO]INTERNSC
|
Enables [disables] short circuiting of InternAtom requests.
|
|
[NO]LBX
|
Enables [disables] all LBX optimizations (equivalent to [NO]ATOMS,
[NO]GRABCMAP, [NO]GRAPHICS, [NO]IMAGE, [NO]INTERNSC, and [NO]WINATTR).
The [NO]LBX option is mutually exclusive with any of the options
controlled by [NO]LBX. The NOLBX option is mutually exclusive with the
/ATOMS qualifier.
|
|
[NO]RGB
|
Enables [disables] color name to RGB mapping in the server. The NORGB
option is mutually exclusive with the /RGB qualifier.
|
|
[NO]SQUISH
|
Enables [disables] squishing of X events.
|
|
[NO]TAGS
|
Enables [disables] use of tags.
|
|
[NO]WINATTR
|
Enables [disables] GetWindowAttributes/GetGeometry grouping into one
round trip.
|
|
[NO]ZEROPAD
|
Enables [disables] zeroing out unused pad bytes in X requests, replies,
and events.
|
The default is /OPTIONS=ALL.
/PARTIAL
/NOPARTIAL
Specifies that this proxy server is allowed to initialize even when it
cannot open all transport sockets specified by the /TRANSPORT
qualifier. These transport sockets are used to receive client requests.
Note that if the proxy server detects that one of the sockets is in use
by another task, the server fails to initialize with the server number
in use, and the next server number is tried (as discussed in the
description of the /SERVER qualifier).
The default is /NOPARTIAL.
/RGB=file-specification
Specifies the file describing the color name to RGB resolution in this
proxy server. This qualifier cannot be specified if the NORGB option is
specified for the /OPTION qualifier.
The default is /RGB=SYS$MANAGER:DECW$RGB.DAT.
/SERVER=server-number
Specifies the server number to assign to this proxy server. Specify an
integer from 0 to 63.
The proxy server first attempts to initialize using the specified
server number. If an active server is already using the specified
number, the proxy server tries the next lower number. This process is
repeated until an unused server number is found or until the proxy
server tries the number 0 and fails. If the number 0 fails and the
number specified was not 63, the server number wraps and attempts are
tried starting with the number 63. The process continues until all
numbers have been tried. If all numbers are in use, the proxy server
fails to initialize and terminates.
For managed proxy servers, the search for a free server number always
starts at 63; any number specified by this qualifier is ignored.
A standalone server started as a subprocess always prints out the
server number used on SYS$ERROR. For standalone proxy servers that are
detached processes, use the /FIXED_SERVER qualifier to force the server
to use the specified server number or fail. Otherwise, there is no
method to determine the server number actually used by the server.
The default is /SERVER=63.
/TAGCACHE=cache-size
Specifies the size of this proxy server's tag cache (in bytes). Specify
the value 0 to disable tag caching.
The default is /TAGCACHE=1048576 (2^20).
/TRANSPORTS="transport-string"
Specifies the transports that this proxy server monitors for incoming
client requests. If the /PARTIAL qualifier is not used, all transports
specified by this qualifier must initialize successfully or the proxy
server fails to initialize with the server number in use and the next
server number is tried, as discussed in the description of the /SERVER
qualifier.
The default is /TRANSPORTS="LOCAL,DECNET,TCPIP".
/ZLEVEL=compression-level
Specifies the Zlib compression level used for stream compression.
Specify an integer from 1 (least compression) to 9 (most compression).
The default is /ZLEVEL=6.
3.6.1.1.3 Stopping LBX Proxy Servers
You can stop LBX proxy servers either automatically or manually.
Stopping Servers Automatically
To stop an LBX proxy server automatically, use the /ONEXIT=TERMINATE
qualifier when you start the server. For standalone proxy servers,
specify this qualifier either on the LBXPROXY command line or in the
lbxproxy-qualifiers parameter of the SYS$MANAGER:DECW$LBXPROXY
command procedure.
For managed servers, specify this qualifier in the parameters
argument in the LBX service definition in the proxy manager's
configuration file.
Note
If not already terminated, all managed proxy servers automatically
terminate when their proxy manager is terminated.
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Stopping Servers Manually
To stop an LBX proxy server manually, use the DCL STOP command.
3.6.1.2 Proxy Manager
The proxy manager handles connection requests between client
applications, the proxy server, and X server in managed configurations.
The following sections describe how to configure and start the proxy
manager.
3.6.1.2.1 The Proxy Manager Configuration File
The proxy manager configuration file contains the information that the
proxy manager needs to be able to locate proxy services. Each line in
the configuration file can contain one of the following:
- Comment -- Comment lines must begin with an
exclamation character (!) in the first character position. All other
characters in the line are ignored.
- Managed service entry -- Managed service entries
have the following format:
service-name MANAGED COMMAND command-file [parameters]
|
where:
|
service-name
|
Specifies the name of the managed service. The service name is
case-insensitive. If the file contains multiple entries with the same
service name, only the first occurrence has any effect. For the LBX
service, the service name must be LBX. Service names must use
characters in the X Portable Character Set with the exception of the
Space, Tab, and Newline characters.
|
|
command-file
|
Specifies the name of the command procedure that the proxy manager
should invoke to create a new instance of a proxy server for this
service. For the LBX service, this argument is usually
SYS$MANAGER:DECW$LBXPROXY_SUB.COM.
|
|
parameters
|
Specifies any parameters to pass to the command procedure specified in
the
command-file argument. All characters following the space
after the
command-file argument are passed as parameters to the command
procedure. For the LBX service, the command procedure expects one
quoted parameter: one or more command qualifiers.
|
Currently, the only managed service supplied with DECwindows Motif is
LBX.
- Unmanaged service entry -- Unmanaged service
entries have the following format:
service-name UNMANAGED address
|
where:
|
service-name
|
Specifies the name of the unmanaged service. The service name is
case-insensitive. If the file contains multiple entries with the same
service name, the manager tries each entry in order until an active and
available proxy server is found. Service names must use characters in
the X Portable Character Set with the exception of the Space, Tab, and
Newline characters.
|
|
address
|
Specifies the address of the proxy server in Inter-Client Exchange
(ICE) format.
|
Currently, no unmanaged service is supplied with DECwindows Motif.
3.6.1.2.2 Starting the Proxy Manager
You can configure the proxy manager to start automatically when
DECwindows Motif starts or manually at a later time.
Starting at DECwindows Motif Startup
To start the proxy manager at DECwindows Motif startup, either edit the
existing SYS$MANAGER:DECW$PRIVATE_APPS_SETUP.COM file or copy the
SYS$MANAGER:DECW$PRIVATE_APPS_SETUP.TEMPLATE file to
SYS$MANAGER:DECW$PRIVATE_APPS_SETUP.COM and edit the newly created
file. For more information, see the section in the Managing DECwindows Motif for OpenVMS Systems manual
that describes how to customize the Session Manager environment.
The DECW$PRIVATE_APPS_SETUP.TEMPLATE file contains global symbols that
are used to control the behavior of a DECwindows session and its
applications. Table 3-4 describes the symbols present in this file
that control the proxy manager.
Table 3-4 Global Symbols Controlling the Proxy Manager
| Symbol |
Description |
|
DECW$PROXY_MANAGER_CONFIG
|
Specifies the name of the proxy manager's configuration file. The
definition of this symbol causes the DECwindows startup process to
start the proxy manager. The file name specified by this symbol
overrides any configuration file specified in the
DECW$PROXY_MANAGER_OPTIONS symbol. A default configuration file,
SYS$MANAGER:DECW$LBXPROXY.DECW$PMCFG, is provided at installation time.
This file has a single service entry for the LBX service.
|
|
DECW$PROXY_MANAGER_LOG
|
Specifies the name of the file that the proxy manager should use to log
events. If the proxy manager starts and this symbol is undefined, the
default log file is SYS$MANAGER:DECW$PROXYMANAGER.LOG.
|
|
DECW$PROXY_MANAGER_OPTIONS
|
Specifies any qualifiers that should be included on the XPROXYMANAGER
command when the proxy manager is started. Note that the configuration
file specified by the DECW$PROXY_MANAGER_CONFIG symbol always has
precedence over any value specified by this symbol.
|
|
DECW$PROXY_MANAGER_QUOTAS
|
Specifies any qualifiers to include on the RUN command line used to
start the proxy manager.
|
Notes
If you restart DECwindows Motif while a proxy manager process is running,
the proxy manager does not restart automatically. To ensure that the
proxy manager restarts (with any associated options) during DECwindows
startup, stop the proxy manager process prior to restarting DECwindows,
as described in Section 3.6.1.2.4.
Also note that when restarting the proxy manager as part of DECwindows
startup, the owner of the proxy manager process is the user who issues
the DECwindows Motif startup command. If DECwindows is started as part of
system startup, the owner is the SYSTEM account. If DECwindows is
started from another account, verify that the owner of that account has
been granted access to the X display server.
|
Starting Manually
To start the proxy manager manually, use the XPROXYMANAGER command:
XPROXYMANAGER [qualifiers]
|
For example, to start a proxy manager using the configuration file
SYS$MANAGER:DECW$LBXPROXY.DECW$PMCFG and the log file
SYS$MANAGER:DECW$PM.LOG, use the following command:
$ XPROXYMANAGER/CONFIGURATION_FILE=SYS$MANAGER:DECW$LBXPROXY.DECW$PMCFG -
_$ /LOG=SYS$MANAGER:DECW$PM.LOG
|
3.6.1.2.3 Qualifiers
Enter XPROXYMANAGER command qualifiers in the same manner as you would
for any other DCL command. For proxy managers started at DECwindows
startup, you can specify these qualifiers in the definition of the
DECW$PROXY_MANAGER_OPTIONS symbol.
/CONFIGURATION_FILE=file-specification
Specifies the configuration file that the proxy manager should use to
define the available proxy services.
The default is SYS$LOGIN:DECW$XPROXYMANAGER.DECW$PMCFG.
/LOG=file-specification
/NOLOG
Specifies the log file that the proxy manager should use to log errors.
The proxy manager uses this file to record each request for a proxy
server. The default is /NOLOG. If the /VERBOSE qualifier is specified,
the default is /LOG. If /LOG is specified without a value, the output
is sent to SYS$ERROR by default.
If an incomplete specification is entered, the following directory
specification is used to complete the command:
SYS$SYSDEVICE:[]DECW$XPROXYMANAGER.LOG
|
/PORT=integer
Specifies the port number that this server monitors for incoming
requests. For the TCP/IP transport, this qualifier specifies an IP port
number from the port number space shared by all users of TCP/IP. For
the DECnet and Local transports, this qualifier specifies a number that
is used to create a unique resource name from the name space of all
users of the Inter-Client Exchange (ICE) protocol. Specify a value from
1 to 16383.
The default port number is 6500.
/TRANSPORT="transport-string"
Specifies the transports which this proxy manager monitors for incoming
client requests.
The default is /TRANSPORT="LOCAL,DECNET,TCPIP".
/VERBOSE
/NOVERBOSE
Specifies whether the proxy manager should log each proxy request to
the proxy manager log file, in addition to error messages.
If the /LOG qualifier is specified, the default is /VERBOSE. If the
/LOG qualifier is not specified, the default is /NOVERBOSE.
3.6.1.2.4 Stopping a Proxy Manager
To stop a proxy manager, you must use the DCL STOP command. The
STOP/EXIT=USER_MODE option (new to OpenVMS Alpha Version 7.3-1) is
recommended.
Stopping the proxy manager also stops all managed proxy servers
controlled by the proxy manager.
3.6.1.3 Authentication in an LBX Environment
When the proxy server connects to an X server, the proxy server
undergoes authentication in the same manner as a client. How the proxy
server obtains its authentication information depends on the type of
proxy server.
A managed proxy server obtains its authentication information from the
proxy manager. The proxy manager in turn receives the authentication
information from the client. The client's default authentication
information is contained in the client's X authority file. The client
can control which X authority file is used by using the /XAUTHORITY
qualifier to the SET DISPLAY command. The client can supply explicit
authentication information on the SET DISPLAY command using the
/LBXAUTHENTICATE and /LBXDATA qualifiers. The client also has the
option of using the /NOLBXAUTHENTICATE qualifier to specify that the
authentication information come from the proxy server's current X
authority file. For more information about the SET DISPLAY command
qualifiers for LBX, see OpenVMS DCL Dictionary: N--Z.
A standalone proxy server obtains its authentication information from
the information present in the current X authority file.
Note
Clients connecting to an X server through an LBX proxy server must have
a valid entry for the proxy server in the client X authority file. If
the associated entry contains a generated, untrusted cookie, access to
the X server is only granted for the initial proxy server connection.
Subsequent client connections cannot use the same cookie to gain access
to the X server.
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