how to have bash script check whether it's a x session?
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Distribution: Debian Etch (w/ dual-boot XP for gaming)
Hmm, whilst I don't have anything constructive to add to this, I don't have the XAUTHORITY envvar set, and running your commands (without the exit on the end) always tell me I'm not in X, even when I am.
At a guess, since everything's a file in Linux, presumably starting X will create a screen file somewhere (localhost:0), and you could check for that?
Edit: OK, I just searched for .*:0.* and got ~/.DCOPserver_$HOSTNAME_:0, but that's KDE-centric. Not so good, though it might form part of a test if it's quicker than the definitive method - assuming that the file is destroyed with X, which I haven't checked.
Another approach is processes - if X is running, you can see it with ps aux. However, that brings its own problems (why couldn't it have a longer and more unique name? ) - my output is
thanks for the replies. Indeed, $XAUTHORITY is not set on my system. I guess Andrzej way of using ps, grepping for X, is the one to go to do it properly.
[ ...However, I'll settle with Hobbletoe's version for the moment... ]
That value should always be set for an X session and never for a session not under X -- unless you manually set it in your login scripts (I have done this when I was routinely logging in and starting X programs I wanted to see on my local display).
Just one question... why are you doing this in ~/.profile and not ~/.xinitrc and ~/.xsession ?
Those are the two files which "traditionally" call programs which modify X.
Just put a line like:
xmodmap ~/.xmodmap &
somewhere above the last line in the file(s) -- and make sure you have the "&" because it is important -- and it should run just fine.
Of course, you're at liberty to do this however you want. I just didn't realize what you were doing at first; so, I answered the question without thinking about the actual problem you were trying to solve.
yes, you're right. However, for some weird reason, it's not executed if I put it in one of the ~/.x files. Actually, it seems these files are not executed on my system at all. But as it's a business machine which I don't administrate, at the end of the day, I don't really care as long as it works - which it does now, thanks again!