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Name	Size	Permission	Date
awk	[ DIR ]	drwxr-xr-x	2022-08-31 11:13
cloud-init	[ DIR ]	drwxr-xr-x	2025-07-17 18:07
coreutils	[ DIR ]	drwxr-xr-x	2024-05-29 10:01
cpanel-pdns	[ DIR ]	drwxr-xr-x	2025-05-30 18:06
dbus-1	[ DIR ]	drwxr-xr-x	2025-08-28 18:07
dovecot	[ DIR ]	drwxr-xr-x	2025-04-15 18:06
gawk	[ DIR ]	drwxr-xr-x	2022-08-31 11:13
gcc	[ DIR ]	drwxr-xr-x	2025-08-26 09:44
getconf	[ DIR ]	drwxr-xr-x	2025-08-28 18:07
grubby	[ DIR ]	drwxr-xr-x	2024-05-29 10:01
hostname	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
imunify-notifier	[ DIR ]	drwxr-xr-x	2024-11-18 18:06
initscripts	[ DIR ]	drwxr-xr-x	2022-10-08 11:08
installkernel	[ DIR ]	drwxr-xr-x	2024-05-29 10:01
linux-boot-probes	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
man-db	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
microcode_ctl	[ DIR ]	drwxr-xr-x	2025-07-16 18:07
nfs-utils	[ DIR ]	drwxr-xr-x	2025-06-06 18:06
openldap	[ DIR ]	drwxr-xr-x	2025-03-11 09:44
openssh	[ DIR ]	drwxr-xr-x	2025-10-01 18:06
os-prober	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
os-probes	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
p11-kit	[ DIR ]	drwxr-xr-x	2024-05-29 10:01
selinux	[ DIR ]	drwxr-xr-x	2025-06-04 18:06
smartmontools	[ DIR ]	drwxr-xr-x	2024-05-29 10:23
sssd	[ DIR ]	drwxr-xr-x	2025-06-06 18:06
sudo	[ DIR ]	drwxr-xr-x	2025-08-28 18:07
tuned	[ DIR ]	drwxr-xr-x	2025-03-12 18:06
utempter	[ DIR ]	drwxr-xr-x	2022-08-31 11:14
audit-functions	990 B	-rwxr-x---	2025-07-15 09:41
chrony-helper	7.17 KB	-rwxr-xr-x	2024-11-05 07:44
cockpit-askpass	45.41 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-certificate-ensure	24.81 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-certificate-helper	5.36 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-client	12.19 KB	-rwxr-xr-x	2025-07-03 14:02
cockpit-client.ui	4.13 KB	-rw-r--r--	2025-07-03 14:02
cockpit-desktop	4.57 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-session	57.16 KB	-rwsr-x---	2025-07-15 09:26
cockpit-ssh	127.35 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-tls	49.57 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-ws	283.1 KB	-rwxr-xr-x	2025-07-15 09:26
cockpit-wsinstance-factory	16.51 KB	-rwxr-xr-x	2025-07-15 09:26
dirmngr_ldap	87.32 KB	-rwxr-xr-x	2022-09-13 10:15
dnf-utils	3.62 KB	-rwxr-xr-x	2024-04-08 10:02
exim.daemon	758 B	-rwxr-xr-x	2025-05-12 17:54
generate-rndc-key.sh	546 B	-rwxr-xr-x	2025-02-20 09:05
glib-pacrunner	21.66 KB	-rwxr-xr-x	2019-10-31 15:15
gpg-check-pattern	111.88 KB	-rwxr-xr-x	2022-09-13 10:15
gpg-preset-passphrase	87.21 KB	-rwxr-xr-x	2022-09-13 10:15
gpg-protect-tool	206.3 KB	-rwxr-xr-x	2022-09-13 10:15
gpg-wks-client	227.22 KB	-rwxr-xr-x	2022-09-13 10:15
grepconf.sh	253 B	-rwxr-xr-x	2018-08-12 07:47
import-state	1.03 KB	-rwxr-xr-x	2022-08-10 13:03
imunify-message-gateway	5.93 MB	-rwxr-xr-x	2025-08-22 10:14
loadmodules	233 B	-rwxr-xr-x	2022-08-10 13:03
nfsrahead	37.12 KB	-rwxr-xr-x	2025-06-04 10:54
nm-daemon-helper	12.6 KB	-rwxr-xr-x	2025-08-26 09:47
nm-dhcp-helper	16.2 KB	-rwxr-xr-x	2025-08-26 09:47
nm-dispatcher	66.16 KB	-rwxr-xr-x	2025-08-26 09:47
nm-initrd-generator	740.48 KB	-rwxr-xr-x	2025-08-26 09:47
no-python	157 B	-rwxr-xr-x	2025-08-26 09:08
packagekit-direct	105.54 KB	-rwxr-xr-x	2023-10-14 13:32
packagekitd	316.01 KB	-rwxr-xr-x	2023-10-14 13:32
pk-offline-update	32.97 KB	-rwxr-xr-x	2023-10-14 13:32
platform-python	11.59 KB	-rwxr-xr-x	2025-08-26 09:08
platform-python-config	204 B	-rwxr-xr-x	2025-08-26 09:08
platform-python3.6	11.59 KB	-rwxr-xr-x	2025-08-26 09:08
platform-python3.6-config	204 B	-rwxr-xr-x	2025-08-26 09:08
platform-python3.6m	11.59 KB	-rwxr-xr-x	2025-08-26 09:08
platform-python3.6m-config	204 B	-rwxr-xr-x	2025-08-26 09:08
platform-python3.6m-x86_64-config	3.54 KB	-rwxr-xr-x	2025-08-26 09:01
report-command-error	8.06 MB	-rwxr-xr-x	2025-08-22 10:14
run-with-intensity	6.1 MB	-rwxr-xr-x	2025-08-22 10:14
scdaemon	442.36 KB	-rwxr-xr-x	2022-09-13 10:15
tcawmgr.cgi	25.1 KB	-rwxr-xr-x	2019-10-13 01:22
virt-what-cpuid-helper	7.91 KB	-rwxr-xr-x	2023-10-14 20:52

Rename

#!/bin/bash
# This script configures running chronyd to use NTP servers obtained from
# DHCP and _ntp._udp DNS SRV records. Files with servers from DHCP are managed
# externally (e.g. by a dhclient script). Files with servers from DNS SRV
# records are updated here using the dig utility. The script can also list
# and set static sources in the chronyd configuration file.

chronyc=/usr/bin/chronyc
chrony_conf=/etc/chrony.conf
chrony_service=chronyd.service
helper_dir=/run/chrony-helper
added_servers_file=$helper_dir/added_servers

network_sysconfig_file=/etc/sysconfig/network
nm_servers_files="$helper_dir/nm-dhcp.*"
dhclient_servers_files="/var/lib/dhclient/chrony.servers.*"
dnssrv_servers_files="$helper_dir/dnssrv@*"
dnssrv_timer_prefix=chrony-dnssrv@

. $network_sysconfig_file &> /dev/null

chrony_command() {
    $chronyc -n -m "$@"
}

is_running() {
    chrony_command "tracking" &> /dev/null
}

get_servers_files() {
    [ "$PEERNTP" != "no" ] && echo "$nm_servers_files"
    [ "$PEERNTP" != "no" ] && echo "$dhclient_servers_files"
    echo "$dnssrv_servers_files"
}

is_update_needed() {
    for file in $(get_servers_files) $added_servers_file; do
        [ -e "$file" ] && return 0
    done
    return 1
}

remove_daemon_state() {
    rm -f $added_servers_file
}

update_daemon() {
    local all_servers_with_args all_servers added_servers

if ! is_running; then
        remove_daemon_state
        return 0
    fi

all_servers_with_args=$(cat $(get_servers_files) 2> /dev/null)

all_servers=$(
        echo "$all_servers_with_args" |
            while read -r server serverargs; do
                echo "$server"
            done | sort -u)
    added_servers=$( (
        cat $added_servers_file 2> /dev/null
        echo "$all_servers_with_args" |
            while read -r server serverargs; do
                [ -z "$server" ] && continue
                chrony_command "add server $server $serverargs" &> /dev/null &&
                    echo "$server"
            done) | sort -u)

comm -23 <(echo -n "$added_servers") <(echo -n "$all_servers") |
        while read -r server; do
            chrony_command -c sources -a 2>/dev/null |
                    while IFS=, read -r type _ address _; do
                [ "$type" = "^" ] || continue
                [ "$(chrony_command "sourcename $address")" = "$server" ] || continue
                chrony_command "delete $address" &> /dev/null
                break
            done
        done

added_servers=$(comm -12 <(echo -n "$added_servers") <(echo -n "$all_servers"))

if [ -n "$added_servers" ]; then
        echo "$added_servers" > $added_servers_file
    else
        rm -f $added_servers_file
    fi
}

get_dnssrv_servers() {
    local name=$1 output

if ! command -v dig &> /dev/null; then
        echo "Missing dig (DNS lookup utility)" >&2
        return 1
    fi

output=$(dig "$name" srv +short +ndots=2 +search 2> /dev/null) || return 0

echo "$output" | while read -r _ _ port target; do
        server=${target%.}
        [ -z "$server" ] && continue
        echo "$server port $port ${NTPSERVERARGS:-iburst}"
    done
}

check_dnssrv_name() {
    local name=$1

if [ -z "$name" ]; then
        echo "No DNS SRV name specified" >&2
        return 1
    fi

if [ "${name:0:9}" != _ntp._udp ]; then
        echo "DNS SRV name $name doesn't start with _ntp._udp" >&2
        return 1
    fi
}

update_dnssrv_servers() {
    local name=$1
    local srv_file=$helper_dir/dnssrv@$name servers

check_dnssrv_name "$name" || return 1

servers=$(get_dnssrv_servers "$name")
    if [ -n "$servers" ]; then
        echo "$servers" > "$srv_file"
    else
        rm -f "$srv_file"
    fi
}

set_dnssrv_timer() {
    local state=$1 name=$2
    local srv_file=$helper_dir/dnssrv@$name servers
    local timer

timer=$dnssrv_timer_prefix$(systemd-escape "$name").timer || return 1

check_dnssrv_name "$name" || return 1

if [ "$state" = enable ]; then
        systemctl enable "$timer"
        systemctl start "$timer"
    elif [ "$state" = disable ]; then
        systemctl stop "$timer"
        systemctl disable "$timer"
        rm -f "$srv_file"
    fi
}

list_dnssrv_timers() {
    systemctl --all --full -t timer list-units | grep "^$dnssrv_timer_prefix" | \
            sed "s|^$dnssrv_timer_prefix$.*$\.timer.*|\1|" |
        while read -r name; do
            systemd-escape --unescape "$name"
        done
}

prepare_helper_dir() {
    mkdir -p $helper_dir
    exec 100> $helper_dir/lock
    if ! flock -w 20 100; then
        echo "Failed to lock $helper_dir" >&2
        return 1
    fi
}

is_source_line() {
    local pattern="^[ \t]*(server|pool|peer|refclock)[ \t]+[^ \t]+"
    [[ "$1" =~ $pattern ]]
}

list_static_sources() {
    while read -r line; do
        if is_source_line "$line"; then
            echo "$line"
        fi
    done < $chrony_conf
}

set_static_sources() {
    local new_config tmp_conf

new_config=$(
        sources=$(
            while read -r line; do
                is_source_line "$line" && echo "$line"
            done)

while read -r line; do
            if ! is_source_line "$line"; then
                echo "$line"
                continue
            fi

tmp_sources=$(
                local removed=0

echo "$sources" | while read -r line2; do
                    if [ "$removed" -ne 0 ] || [ "$line" != "$line2" ]; then
                        echo "$line2"
                    else
                        removed=1
                    fi
                done)

[ "$sources" == "$tmp_sources" ] && continue
            sources=$tmp_sources
            echo "$line"
        done < $chrony_conf

echo "$sources"
    )

tmp_conf=${chrony_conf}.tmp

cp -a $chrony_conf $tmp_conf &&
        echo "$new_config" > $tmp_conf &&
        mv $tmp_conf $chrony_conf || return 1

systemctl try-restart $chrony_service
}

print_help() {
    echo "Usage: $0 COMMAND"
    echo
    echo "Commands:"
    echo "	create-helper-directory"
    echo "	update-daemon"
    echo "	remove-daemon-state"
    echo "	update-dnssrv-servers NAME"
    echo "	enable-dnssrv NAME"
    echo "	disable-dnssrv NAME"
    echo "	list-dnssrv"
    echo "	list-static-sources"
    echo "	set-static-sources < sources.list"
    echo "	is-running"
    echo "	command CHRONYC-COMMAND"
}

case "$1" in
    create-helper-directory)
        prepare_helper_dir
        ;;
    update-daemon|add-dhclient-servers|remove-dhclient-servers)
        is_update_needed || exit 0
        prepare_helper_dir && update_daemon
        ;;
    remove-daemon-state)
        remove_daemon_state
        ;;
    update-dnssrv-servers)
        prepare_helper_dir && update_dnssrv_servers "$2" && update_daemon
        ;;
    enable-dnssrv)
        set_dnssrv_timer enable "$2"
        ;;
    disable-dnssrv)
        set_dnssrv_timer disable "$2" && prepare_helper_dir && update_daemon
        ;;
    list-dnssrv)
        list_dnssrv_timers
        ;;
    list-static-sources)
        list_static_sources
        ;;
    set-static-sources)
        set_static_sources
        ;;
    is-running)
        is_running
        ;;
    command|forced-command)
        chrony_command "$2"
        ;;
    *)
        print_help
        exit 2
esac

exit $?