Command line VNC client
vncdotool is a command line VNC client.
It comes in handy when automating interactions with virtual machines or some hardware devices that are otherwise difficult to control.
Currently under development, so use at your own peril but what is the worst that could happen?
To see vncdotool in action you can run it against an existing VNC server or start one locally with x11vnc. Then you can run:
pip install twisted # if you don't already have it python vncdotool/command.py -s hostaddr type "hello world"
If you have PIL installed then you can do a screen captures with:
python vncdotool/command.py -s hostaddr capture screen.png
vncdotool depends on Twisted. Additionally, for capture and expect commands to work you will need the Python Image Library. You can use your favourite package manager to grab them. Once you have the dependencies installed you install from the unpacked source tree.
python setup.py install
Once installed you can use the vncdotool command to send key-presses. Alphanumerics are straightforward just specify the character. For other keys longer names are used:
vncdotool key a vncdotool key 5 vncdotool key . vncdotool key enter vncdotool key shift-a vncdotool key ctrl-C vncdotool key ctrl-alt-del
To type longer strings when entering data or commands you can use the type c command, which does not support special characters:
vncdotool type "hello world"
You can control the mouse pointer with move and click commands:
vncdotool move 100 100 vncdotool click 1
If you have the Python Imaging Library (PIL) installed you can also make screen captures of the session:
vncdotool capture screenshot.png
With PIL, you can wait for the screen to match a known image.:
vncdotool expect somescreen.png 0
Putting it all together you can specify multiple actions on a single command line. You could automate a login with the following:
vncdotool type username key enter expect password_prompt.png vncdotool type password move 100 150 click 1 expect welcome_screen.png
Creating long lists of commands can be time consuming so vncdotool provides a proxy mode that logs messages and screen captures. The log can then be edited and played back.:
vncdotool proxy 6000 > vnc.log vncviewer localhost:6000 sed -i s/click 1/click 2/ vnc.log vncdotool < vnc.log
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