Disclaimer:
I am a bit of a Linux noob :(
Problem:
I have an interesting problem that I could use some help with. Essentially, I want to overwrite the default actions for the "Print Screen" button in Linux. My reasons for doing so are that I have a homemade graphics card running attached to the computer and I'm trying to make a utility where I can capture what it is outputting to a separate monitor and send it back to the "host" computer. For purposes here, I only want to know: How can I execute a script upon pressing the Print Screen button? Note that I cannot install xbindkeys or any other software. Ideally I would like to be able to run a script to enable this behavior.
Current work-around:
Currently, I have a .bashrc script:
#!/bin/bash
export PATH=/home/username/bin:$PATH
In the /home/username/bin folder I have a script "gnome-screenshot" that, for now, just performs some arbitrary task (it actually does this: "cat /usr/share/icons// > /dev/dsp" -- try it! It's fun!).
I am working on school computers, so I first CTRL-ALT-F5 to open a terminal login, login, then source .bashrc. I then startx -- :1 to start a new X session. Now, if I hit the PrintScreen button, it uses my gnome-screenshot, not the default screencapture program.
Is there anyway to do this without all of the restarting X? In short, is there a way to source my .bashrc script, or otherwise modify my PATH variable, before or while I login?
Another Approach:
I also tried, briefly, to xmodmap and the keycode to execute a script, but couldn't figure out how to tie them together. I know the keycode (111) but can't figure out how to run a script on press. I believe it might be possible to make a sort of binding using this but can't figure out how.
Help!
I'd really appreciate some help or comments!
(Edit): Added Details About Distribution:
cat /etc/redhat-release tells me:
Red Hat Enterprise Linux Client release 5.8 (Tikanga)