postinst is in lxc-android-config 0.162.
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 | #!/bin/sh
set -e
OLDOVERRIDE=/etc/init/lxc-android-fstab.override
if [ "$1" = configure ]; then
    dpkg-divert --package lxc-android-config --rename --divert \
        /lib/udev/rules.d/50-firmware.rules.disabled \
        --remove /lib/udev/rules.d/50-firmware.rules || true
    dpkg-divert --package lxc-android-config --rename --divert \
        /lib/udev/rules.d/60-persistent-v4l.rules.disabled \
        --remove /lib/udev/rules.d/60-persistent-v4l.rules || true
    dpkg-divert --package lxc-android-config --rename --divert \
        /lib/udev/rules.d/90-alsa-restore.rules.disabled \
        --remove /lib/udev/rules.d/90-alsa-restore.rules || true
    dpkg-divert --package lxc-android-config --rename --divert \
        /lib/udev/rules.d/90-alsa-ucm.rules.disabled \
        --remove /lib/udev/rules.d/90-alsa-ucm.rules || true
    if [ -e /system/build.prop ]; then
        device=$(grep ^ro.product.device= /system/build.prop |sed -e 's/.*=//')
        cp /usr/lib/lxc-android-config/70-$device.rules /lib/udev/rules.d/ || true
        # add device specific hacks and workarounds below
    fi
    # erase old override file that was created inside create-fstab script
    [ -f $OLDOVERRIDE ] && rm -f $OLDOVERRIDE
fi
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/init/lxc-android-fstab.conf 0.38~ -- "$@"
# End automatically added section
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/rsyslog.d/45-binder.conf 0.44~ -- "$@"
# End automatically added section
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