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Access a Photon workspace on a remote node
phditto [-b baud] [-H time1[,time2][,time3]]
[-h height] [-i igrp] [-k]
[-M kbytes[,Mbytes]] [-m modem]
[-N number] [-n path[+]] [-o options]
[-p path]
[-s service] [-t ipaddr[:port]]
[-U userid[:password]] [-u] [-V[V]...]
[-w width] [-X offset] [-x offset]
[-Y offset] [-y offset] [host]
Neutrino
- -b baud
- Specify the effective baud rate of the communication link.
The default is the current baud rate of the communication link.
- -H time1 [,time2] [,time3]
- Mouse holdoff times (in tenths of a second):
- time1 — normal mouse motion.
- time2 — motion with button press.
- time3 — motion with a drag cursor.
Default times are scaled, based on baud rate, yielding 1.2, 0.6, and 0.3
seconds at 9600 baud.
The default mouse holdoff is disabled at baud rates above 115,200.
- -h height
- The height of the window, in pixels. The default is 480 pixels.
- -i igrp
- Specify phditto's input group. Default is 1.
- -k
- Start in kiosk (full-screen) mode. Pressing
Ctrl-Alt-K anytime
toggles kiosk mode.
- -M kbytes [,Mbytes]
- Specify RAM cache (and optionally the disk cache) limits.
The default is 4096,20, which corresponds to a 4M cache and a 20M disk cache.
- -m modem
- Specify the name of the QNX serial device to use for remote connect.
- -N number
- Set the number of messages buffered to allow write-ahead draws to
phditto. The actual number used is the lesser of this option and the
-b option of phrelay. The default value is 20.
Use a lower value to save memory on the Neutrino host running phrelay at the expense of
throughput, or, if memory is not an issue, a higher value to gain some additional throughput
performance.
Adjusting this setting has the most effect when end-to-end response time is slow compared with
throughput, such as over a modem or when there are many network hops between the local
and remote ends.
- -n path[+]
- View and interact with Photon in the specified path, e.g.
-n /dev/photon.
To create a new private Photon session on a QNX4 host, end path with
+, e.g. -n//3+.
- -o options
- Options:
- 0 — no compression.
- 1 — BPE (Byte-Pair Encoding) compression.
- 2 — RLL (Run Length Limited) compression.
- 8 — Use CRC (Cyclic Redundancy Check) error checking.
Combine options by addition, e.g. to specify BPE and CRC, select
9. If the selected baud rate requires it, compression will be
automatically selected unless you specify 0.
- -p path
- Use the path for the disk cache. If not specified, the default is /usr/photon. If you don't have permission to write to this location caching is disabled.
- -s service
- Request a specific phrelay service. For more information, see
“Using predefined Photon services”
in the documentation for phrelay.
- -t ipaddr[:port]
- Connect via TCP/IP to this IP address (with optional port). (Specifying host does the same thing.)
- -U userid[:password]
- Login as this user (with optional password) when using services. The default is $LOGNAME.
- -u
- Unlocked mode. Allow user to navigate independently at the remote Photon space.
- -V[V...]
- Be verbose; more V characters cause more verbosity.
Output is sent to standard output.
- -w width
- The width of the window, in pixels. The default is 640 pixels.
- -X offset
- Specify the initial x offset in the local Photon event space.
- -x offset
- Specify the x offset of the remote phditto window.
- -Y offset
- Specify the initial y offset in the local Photon event space.
- -y offset
- Specify the y offset of the remote phditto window.
- host
- Connect to this TCP/IP host or IP address.
The phditto utility lets you view
and interact with another Photon workspace in a network. When you
“ditto” the remote node, both you and the remote user can
share the same workspace.
You can end the phditto session by selecting Close from
phditto's window menu (click the right mouse button
on the phditto label in the Taskbar).
When you specify a modem (using -m), phditto
first acts as a simple text terminal emulator so you can interact with
the modem, dial up a remote QNX machine, and log in. Once you're
logged in, you can then start up a Photon session by entering the
following command:
exec /usr/bin/phrelay
The phditto program will then synchronize with
the remote phrelay program and start to function
as a Photon graphics terminal.
When you specify a TCP/IP connection (using
-t), the inetd program running on the remote
QNX host will automatically launch phrelay for you, provided
phrelay and inetd have been configured properly.
Run an encapsulated Photon session (Photon within Photon) on the local machine:
phditto localhost
Start a private pfm service on host:
phditto -Spfm -t host
Connect through the modem on /dev/ser2
to a remote QNX box. Once logged into QNX, type exec /usr/bin/phrelay:
phditto -m/dev/ser2
Connect via the Internet to an IP port on a remote QNX machine where a remote Photon
session will be automatically started:
phditto -t198.53.31.1:4869
Connect to a remote QNX machine and run an encapsulated PhAB session
as user joe:
phditto -t198.53.31.1 -sphab -Ujoe:password
To create a new private Photon session on
a remote node, you must specify one of -m, -t,
or host because native QNX messaging is not currently implemented as
a transport mechanism.
You can use Qnet to
connect to an existing Photon session on a remote node. For example:
phditto -tlocalhost -n/net/remotehost/dev/photon
When connecting to a machine running an older version of phrelay, it's possible to exceed the draw buffer limit.
In this case, the window title displays the error: “[Error: Large Draw Buffers]”.
phrelay,
phrelaycfg
Using the Photon microGUI
in the Neutrino User's Guide
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