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#!/bin/sh -e
# Update /etc/hosts with a well curated blacklist of malware, ads, porn, etc.
# Custom hosts are preserved.
[ "$USER" = root ] || exec sudo "$0" "$@"
echo "Checking from https://github.com/StevenBlack/hosts:"
lsd=$(curl -s "https://api.github.com/repos/StevenBlack/hosts/commits?path=hosts&page=1&per_page=1"| jq -r '.[0].commit.committer.date')
echo "last source update: $(date -j -f "%FT%TZ" "$lsd")"
echo "last local update: $(date -r /etc/hosts)"
[ $(date -j -f "%FT%TZ" "$lsd" +%s) -lt $(date -r /etc/hosts +%s) ] && echo "Nothing to do" && exit
cd /etc
cp -p hosts hosts.old
hosts=$(awk '/^# Custom host/, /^# End of custom host/' hosts.old)
curl -s 'https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts' | awk '
BEGIN { hosts = ARGV[1]; ARGV[1] = "" }
/^# Custom host/ { print hosts; next }
/^# End of custom host/ { next }
{ print }
' "$hosts" > hosts.new
mv hosts.new hosts
[ "$(uname -s)" != Darwin ] || { dscacheutil -flushcache; killall -HUP mDNSResponder; }
diff -u /etc/hosts.old /etc/hosts | diffstat
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