I'm opening terminal window to server with Putty or some other terminal emulator. I usually work with Putty and use x11 forwarding. Putty create .Xauthority file if one is missing. I connect to server with my username, then connect with sudo - oracle to oracle account on the same server. I have to bring X credentials to oracle session. I can do it with xauth command. It works. But when I leave session I wish to clean .Xauthority in oracle session and in my user session. If using exit from shell I can use .bash_logout to put some code in there to clean up. But when I close window this method is not working.

Is there a way to run a program before terminal closes with Alt-F4 or click on close window button.

Regards
Franjo

No, by doing ALT-F4 or closing the window you are destructively ending any sessions you have. I don't see how you can monitor that unless you rewrite the server providing the session and put a signal handler in there to cover the signal cases which occur when these events happen. Probably SIGTERM if not some other ones and probably also SIGTERM under certain status return conditions, because closing normally probably also results in a SIGTERM. Either case, normal closure or destructive one there's no harm in trying to delete something that's no longer there, simply results in a minor error.

Would it be possible to close your session using logout or exit?
I guess in this case the bash_logout should be called.
Alternatively, you could have your server do a clean-up using a crontab task every hour or something.

Thank you, rtmistler!
Your answer is quite educational. Because of your first one syllable word, I wrote some code in .bash_login, bash​rc and bash_logout. If I'm behaving nice and play by the rule all works good. I can jump from server to server and clean at leaving the session. I'll write exit in terminal instead of clicking on little X in the corner of window.
Thanks a lot, but in some future time I'll nag you about this SIG-things.

Regards, Franjo

Also there is the shortcut Ctrl-D (or Cmd-D) to close the terminal. This issues exit and is therefore compatible with your .bash_logout.

Yes, good point that CTRL-D causes a logout action.

OP the signals I was referring too would be a very complex solution, not something with settings or even a script, but instead re-writing code that runs the terminal or XWindow itself. Unless you're up for that it would be a highly difficult path to a solution when the better options are to follow normal guidelines of using exit or as above, CTRL-D.

Hi, hoes
Thanks for concerning. I'm doing exactly as you propose. It works

Regards, Franjo

Hi, hoes,
That is exactly what I needed. I'm no mouse clicking enthusiast, more keyboard fan!

Thanks, again to all.

Regards, Franjo