/usr/share/gdm/generate-config is in gdm3 3.18.3-0ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | #! /bin/sh
set -e
DEFAULTS_GENERATED=/var/lib/gdm3/greeter-dconf-defaults
DEFAULTS_DIR=/usr/share/gdm/dconf
if [ -d /var/lib/gdm ];then
usermod --home /var/lib/gdm3 gdm
rm -rf /var/lib/gdm
fi
if [ -d /var/lib/gdm3 ]; then
needed=no
if [ -f $DEFAULTS_GENERATED ]; then
for f in \
$DEFAULTS_DIR $DEFAULTS_DIR/*-settings \
$DEFAULTS_DIR/locks $DEFAULTS_DIR/locks/*-locks \
/etc/gdm3/greeter.dconf-defaults; do
if [ "$f" -nt $DEFAULTS_GENERATED ]; then
needed=yes
break
fi
done
else
needed=yes
fi
if [ "$needed" = yes ]; then
dconf compile $DEFAULTS_GENERATED $DEFAULTS_DIR
fi
fi
for i in $(pidof dconf-service); do
if [ "$(stat -c %U /proc/$i)" = gdm ]; then
kill -HUP $i || true
fi
done
exit 0
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