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Checking just for root is insufficient since that does not guarantee write/read permissions in XKM_OUTPUT_DIR (for example with sandbox). Check if we can write a file, as well as read it later. Otherwise, invoke the fallback to /tmp Signed-off-by: Nirbheek Chauhan <nirbheek@gentoo.org> Signed-off-by: Rémi Cardona <remi@gentoo.org> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
The X server uses this directory to store the compiled version of the
current keymap and/or any scratch keymaps used by clients. The X server
or some other tool might destroy or replace the files in this directory,
so it is not a safe place to store compiled keymaps for long periods of
time. The default keymap for any server is usually stored in:
X<num>-default.xkm
where <num> is the display number of the server in question, which makes
it possible for several servers *on the same host* to share the same
directory.
Unless the X server is modified, sharing this directory between servers on
different hosts could cause problems.