| 1 | #!/bin/sh |
| 2 | set -eu |
| 3 | |
| 4 | BASE_URL='https://www.internic.net/domain' |
| 5 | destdir=${DNS_ROOT_HINTS_DIR:-"/usr/share/dns-root-hints"} |
| 6 | |
| 7 | if ! [ -w "$destdir" ]; then |
| 8 | echo 'Needs to run as root.' >&2 |
| 9 | exit 1 |
| 10 | fi |
| 11 | |
| 12 | tmpdir=$(mktemp -d) |
| 13 | |
| 14 | cleanup() { |
| 15 | rm "$tmpdir"/* 2>/dev/null || true |
| 16 | rmdir "$tmpdir" || true |
| 17 | } |
| 18 | trap cleanup EXIT HUP INT TERM |
| 19 | |
| 20 | for f in named.root named.root.sig; do |
| 21 | curl -sLR "$BASE_URL/$f" -o "$tmpdir/$f" |
| 22 | done |
| 23 | |
| 24 | read_version() { |
| 25 | sed -En 's/.*related version of root zone:\s*([0-9]{10}).*/\1/p' "$1" |
| 26 | } |
| 27 | # compare new and current versions |
| 28 | new_ver=$(read_version "$tmpdir"/named.root) |
| 29 | cur_ver=$(read_version "$destdir"/named.root) |
| 30 | |
| 31 | echo "Version $cur_ver <- Installed" |
| 32 | echo "Version $new_ver <- Downloaded" |
| 33 | |
| 34 | # update to new version if needed |
| 35 | if [ "$new_ver" != "$cur_ver" ]; then |
| 36 | gpgv --keyring "$destdir"/verisign-grs-nstld-key.gpg \ |
| 37 | "$tmpdir"/named.root.sig "$tmpdir"/named.root || exit 10 |
| 38 | |
| 39 | mv "$tmpdir"/named.root "$destdir"/named.root |
| 40 | mv "$tmpdir"/named.root.sig "$destdir"/named.root.sig |
| 41 | |
| 42 | printf '\nZone file updated.\n\n' |
| 43 | else |
| 44 | printf '\nZone file already up-to-date.\n\n' |
| 45 | fi |