preinst is in gdm 3.18.3-0ubuntu2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
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 39 40 41 42 43 44 45 46 | #!/bin/sh
set -e
# Prepare to move a conffile without triggering a dpkg question
prep_mv_conffile() {
local PKGNAME="$1"
local CONFFILE="$2"
[ -e "$CONFFILE" ] || return 0
local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
if [ "$md5sum" = "$old_md5sum" ]; then
rm -f "$CONFFILE"
fi
}
if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
dpkg --compare-versions "$2" lt-nl "3.18.0-2~"; then
if [ -L /etc/pam.d/gdm-launch-environment ]; then
rm -f /etc/pam.d/gdm-launch-environment
fi
if [ -L /etc/pam.d/gdm-password ]; then
rm -f /etc/pam.d/gdm-password
fi
# Transition conffiles from gdm to gdm3
conffiles="$(dpkg-query -W -f='${Conffiles}' gdm | cut -d' ' -f2)" || true
for f in ${conffiles}; do
prep_mv_conffile gdm ${f}
done
#clean up old dconf conffiles
if [ -d /etc/dconf/db/gdm.d ]; then
rmdir --ignore-fail-on-non-empty /etc/dconf/db/gdm.d 2> /dev/null
rm -rf /etc/dconf/db/gdm
fi
rm -rf /etc/dconf/profile/gdm
fi
exit 0
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