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#! /bin/sh
set -euf
if test "${nosudo-false}" != true -a `id -u` != 0; then
echo "we're going sudo..." >&2
exec sudo "$0" "$@"
exit 23 # go to hell
fi
DIRNAME=`dirname $0`
export PATH="`readlink -f $DIRNAME`:$PATH"
hosts="${hosts-/etc/hosts}"
bs='# BEGIN OF RETIOLUM'
es='# END OF RETIOLUM'
case "${*-I am made of stupid}" in
(start|restart)
hosts | $0 replace magic
;;
(stop)
$0 clear magic
;;
('print magic')
echo "$bs"
cat
echo "$es"
;;
('create magic')
$0 has magic || $0 print magic >> $hosts < /dev/null
;;
('destroy magic')
$0 has magic && sed -ie "/^$bs$/,/^$es$/d" $hosts
;;
('has magic')
grep -q "^$bs$" $hosts && grep -q "^$es$" $hosts
;;
('replace magic')
$0 destroy magic && $0 print magic >> $hosts
;;
('clear magic')
$0 replace magic < /dev/null
;;
(*)
echo 'Error 1: You are made of stupid!' >&2
exit 23
esac
|
