How to get default command to open a terminal window? (Bash or Python)

Desktop entry files (.desktop files) may indicate that an application requires a terminal window to run ("Terminal=true"), e.g. vim & maxima.
How does a .desktop launcher determine which terminal to use? E.g. when opening a file associated with vim, what points it to 'urxvtc -e %s' or 'gnome-terminal...' or whatever?
Is there a standard environment variable with the terminal command? $TERM only contains an identifying name but I don't see how to programmatically deduce the command from it. Grepping through the output of "set" doesn't show me anything useful either.
My search-fu has failed me. Does anyone have any ideas?
EDIT: Clarified subject and post.
Last edited by Xyne (2011-02-02 14:00:14)

Maybe my search-fu can be of help here:
For KDE:
terminal=$(kreadconfig --file kdeglobals --group General \
--key TerminalApplication --default konsole)
For GNOME:
TERM_EXEC_KEY="/desktop/gnome/applications/terminal/exec"
TERM_EXEC_ARG_KEY="/desktop/gnome/applications/termina/exec_arg"
TERM_EXEC=$( gconftool-2 --get ${TERM_EXEC_KEY}) # e.g.
"gnome-terminal"
TERM_EXEC_ARG=$( gconftool-2 --get ${TERM_EXEC_ARG_KEY} ) # e.g. "-x"
terminal="$TERM_EXEC $TERM_EXEC_ARG"
For XFCE:
Xfce has a directory called "share/xfce4/helpers/" which contains desktop entry files for commonly used terminals, browsers and email apps. These entries contain extra keys like X-XFCE-Category=WebBrowser or X-XFCE-Category=TerminalEmulator .
Then there is a file called ".config/xfce4/helpers.rc" which in my case looks like:
WebBrowser=firefox
MailReader=thunderbird
From: http://www.mail-archive.com/[email protected] … 01661.html
edit: there is also xdg-settings (in xdg-utils) which can store default-app information, but i'm not sure if all DE's make use of this..
Last edited by litemotiv (2011-02-02 14:08:27)

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