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|
#!/bin/bash
# Copyright (C) 2009-2014 Timo Weingärtner <timo@tiwe.de>
#
# This file is part of openssh-known-hosts.
#
# openssh-known-hosts is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# openssh-known-hosts is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with openssh-known-hosts. If not, see <http://www.gnu.org/licenses/>.
set -euC
CONFDIR=${CONFDIR:-/etc/openssh-known-hosts}
PLUGIN_PATH=${PLUGIN_PATH:-/usr/local/share/openssh-known-hosts/plugins:/usr/share/openssh-known-hosts/plugins}
CACHEDIR=${CACHEDIR:-/var/cache/openssh-known-hosts}
LOCK=${LOCK:-/var/lock/openssh-known-hosts}
OUTFILE=${OUTFILE:-/var/lib/openssh-known-hosts/ssh_known_hosts}
readonly CONFDIR PLUGIN_PATH CACHEDIR LOCK OUTFILE
path_search () {
local search=$1
local -a pathlist
IFS=: read -ra pathlist <<< "$2"
if [[ ${search} =~ / ]]; then
echo "${search}"
return 0
fi
for path in "${pathlist[@]}"; do
if [ -f "${path}/${search}" ]; then
echo "${path}/${search}"
return 0
fi
done
echo "'${search}' not found in '$2'!" >&2
exit 127
}
cleanup () {
rm -f "${OUTFILE}.new"
kill "${LOCKPID}"
lockfile-remove "${LOCK}"
}
download_source () (
local sourcename=$1
local sourcefile=$2
cd "${CACHEDIR}/${sourcename}"
set -a
. "${sourcefile}"
set +a
# shellcheck disable=SC2091
$(path_search "$PLUGIN" "$PLUGIN_PATH") >| log 2>&1 || {
exitcode=$?
rm -f new
ignore=''
for e in ${EXIT_IGNORE:-0}; do
if [[ $e = "$exitcode" ]]; then
ignore=1
break
fi
done
if [ -z "$ignore" ] || [ "$fail" ]; then
echo "${source} exited with code ${exitcode}, log follows:"
cat log
echo
fi
if [ "$fail" ]; then
exit 1
fi
} >&2
)
if [ $# -eq 1 ] && [ "$1" = "-f" ]; then
fail=1
else
fail=''
fi
trap cleanup EXIT
lockfile-create "${LOCK}"
lockfile-touch "${LOCK}" &
LOCKPID="$!"
mkdir -p "${CACHEDIR}"
cd "${CACHEDIR}"
find -mindepth 2 -maxdepth 2 -type f -name new -delete
run-parts --list "${CONFDIR}/sources/" | while read -r sourcefile; do
source=${sourcefile##*/}
mkdir -p "${source}"
download_source "${source}" "${sourcefile}"
if [ -e "${source}/new" ]; then
mv "${source}/new" "${source}/current"
fi
if [ -e "${source}/current" ]; then
if [ -e "${sourcefile}.filter" ]; then
if [[ ${source}/filtered -ot ${source}/current ]] || [[ ${source}/filtered -ot ${sourcefile}.filter ]]; then
mapfile -t filter < "${sourcefile}.filter"
for i in "${!filter[@]}"; do
if [[ ${filter[$i]} =~ ^($|#) ]]; then
unset filter[$i]
fi
done
while read -r hostlist rest; do
IFS=, read -ra hostarray <<<"$hostlist"
new_hostlist=''
for host in "${hostarray[@]}"; do
for rule in "${filter[@]}"; do
if [[ ${host} =~ ${rule#* } ]]; then
if [[ ${rule%% *} =~ ^[aopy] ]]; then
new_hostlist="${new_hostlist}${host},"
fi
break
fi
done
done
[ "$new_hostlist" ] || continue
echo "${new_hostlist%,} ${rest}"
done < "${source}/current" | sort -u >| "${source}/filtered.new"
mv "${source}/filtered.new" "${source}/filtered"
fi
cat "${source}/filtered" >&3
else
sort -u "${source}/current" >&3
fi
fi
done 3>| "${OUTFILE}.new"
if cmp -s "${OUTFILE}" "${OUTFILE}.new"; then
rm "${OUTFILE}.new"
else
mv "${OUTFILE}.new" "${OUTFILE}"
fi
# clean up cache dirs of vanished sources
for d in *; do
[ -d "$d" ] || continue
[ -e "${CONFDIR}/sources/$d" ] || rm -fr "$d"
done
# vim:set ft=sh:
|
