#!/bin/sh

set -e
set -u

if [ -d '/run/systemd/system' ]; then
  /usr/bin/systemctl --system daemon-reload > '/dev/null' 2>&1 || \
    /usr/bin/true
fi

case "${1}" in
  remove|purge)
    if [ -x '/usr/bin/deb-systemd-helper' ]; then
      /usr/bin/deb-systemd-helper purge 'argon-one.service' > '/dev/null' 2>&1 || \
        /usr/bin/true
      /usr/bin/deb-systemd-helper unmask 'argon-one.service' > '/dev/null' 2>&1 || \
        /usr/bin/true
    fi
    BOOT=$(/usr/bin/grep '/boot' '/etc/fstab' | /usr/bin/mawk '$1 !~ /^#/ && $2 ~ /^[/]/ {print $2}')
    /usr/bin/sed --in-place 's/dtparam=i2c_arm=on/dtparam=i2c_arm=off/' "${BOOT}/config.txt"
    /usr/bin/sed --in-place 's/console=tty0/console=tty0 console=ttyS1,115200/' "${BOOT}/cmdline.txt"
  ;;
esac