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improve chrony-helper to keep track of servers added from DHCP (#787042)

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This commit is contained in:
Miroslav Lichvar 2012-02-10 17:22:48 +01:00
parent 7457494fee
commit 2ca8fa6882
2 changed files with 51 additions and 17 deletions
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16
chrony.dhclient
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@ -5,20 +5,18 @@ SERVERFILE=$SAVEDIR/chrony.servers.$interface
chrony_config() {
rm -f $SERVERFILE
if [ "$PEERNTP" != "no" ]; then
/usr/libexec/chrony-helper command "$(
for server in $new_ntp_servers; do
echo "add server $server $NTPSERVERARGS"
echo "$server $NTPSERVERARGS" >> $SERVERFILE
done)" &> /dev/null || :
for server in $new_ntp_servers; do
echo "$server $NTPSERVERARGS" >> $SERVERFILE
done
/usr/libexec/chrony-helper is-running &&
/usr/libexec/chrony-helper add-dhclient-servers || :
fi
}
chrony_restore() {
if [ -f $SERVERFILE ]; then
/usr/libexec/chrony-helper command "$(
while read server serverargs; do
echo "delete $server"
done < $SERVERFILE)" &> /dev/null
rm -f $SERVERFILE
/usr/libexec/chrony-helper is-running &&
/usr/libexec/chrony-helper remove-dhclient-servers || :
fi
}

52
chrony.helper
View File

@ -4,6 +4,7 @@ config=/etc/chrony.conf
keyfile=/etc/chrony.keys
chronyc=/usr/bin/chronyc
dhclient_servers=/var/lib/dhclient/chrony.servers.*
dhclient_added_servers=/var/lib/dhclient/chrony.added_servers
service_name=chronyd.service
get_key() {
@ -36,14 +37,43 @@ generate_commandkey() {
[ -n "$commandkey" ] && echo "$commandkeyid $commandkey" >> $keyfile
}
update_dhclient_added_servers() {
new_servers=$(echo "$1" | sort -u)
old_servers=$(cat $dhclient_added_servers 2> /dev/null)
[ "$old_servers" = "$new_servers" ] && return 0
[ -n "$new_servers" ] && echo "$new_servers" > $dhclient_added_servers ||
rm -f $dhclient_added_servers
}
add_dhclient_servers() {
command=$(cat $dhclient_servers 2> /dev/null |
while read server serverargs; do
echo "add server $server $serverargs"
done)
if [ -n "$command" ]; then
chrony_command "$command" &> /dev/null
fi
shopt -s nullglob
servers_files=($dhclient_servers)
shopt -u nullglob
(( ${#servers_files[*]} )) || return 0
added_servers=$(
cat $dhclient_added_servers 2> /dev/null
cat ${servers_files[*]} |
while read server serverargs; do
chrony_command "add server $server $serverargs" &> /dev/null &&
echo "$server"
done)
update_dhclient_added_servers "$added_servers"
}
remove_dhclient_servers() {
[ -f $dhclient_added_servers ] || return 0
all_servers=$(
cat $dhclient_servers 2> /dev/null |
while read server serverargs; do
echo "$server"
done | sort -u)
echo "$all_servers" | comm -23 $dhclient_added_servers - |
while read server; do
chrony_command "delete $server" &> /dev/null
done
added_servers=$(echo "$all_servers" | comm -12 $dhclient_added_servers -)
update_dhclient_added_servers "$added_servers"
}
is_running() {
@ -57,6 +87,12 @@ case "$1" in
add-dhclient-servers)
add_dhclient_servers
;;
remove-dhclient-servers)
remove_dhclient_servers
;;
is-running)
is_running
;;
command)
is_running && chrony_command "$2"
;;
@ -64,7 +100,7 @@ case "$1" in
chrony_command "$2"
;;
*)
echo $"Usage: $0 {generate-commandkey|add-dhclient-servers|command|forced-command}"
echo $"Usage: $0 {generate-commandkey|add-dhclient-servers|remove-dhclient-servers|is-running|command|forced-command}"
exit 2
esac
exit $?