1# Sample dhcpcd hook script for NTP 2# It will configure either one of NTP, OpenNTP or Chrony (in that order) 3# and will default to NTP if no default config is found. 4 5# Like our resolv.conf hook script, we store a database of ntp.conf files 6# and merge into /etc/ntp.conf 7 8# You can set the env var NTP_CONF to override the derived default on 9# systems with >1 NTP client installed. 10# Here is an example for OpenNTP 11# dhcpcd -e NTP_CONF=/usr/pkg/etc/ntpd.conf 12# or by adding this to /etc/dhcpcd.conf 13# env NTP_CONF=/usr/pkg/etc/ntpd.conf 14# or by adding this to /etc/dhcpcd.enter-hook 15# NTP_CONF=/usr/pkg/etc/ntpd.conf 16# To use Chrony instead, simply change ntpd.conf to chrony.conf in the 17# above examples. 18 19: ${ntp_confs:=ntp.conf ntpd.conf chrony.conf} 20: ${ntp_conf_dirs=/etc /usr/pkg/etc /usr/local/etc} 21ntp_conf_dir="$state_dir/ntp.conf" 22 23# If NTP_CONF is not set, work out a good default 24if [ -z "$NTP_CONF" ]; then 25 for d in ${ntp_conf_dirs}; do 26 for f in ${ntp_confs}; do 27 if [ -e "$d/$f" ]; then 28 NTP_CONF="$d/$f" 29 break 2 30 fi 31 done 32 done 33 [ -e "$NTP_CONF" ] || NTP_CONF=/etc/ntp.conf 34fi 35 36# Derive service name from configuration 37if [ -z "$ntp_service" ]; then 38 case "$NTP_CONF" in 39 *chrony.conf) ntp_service=chronyd;; 40 *) ntp_service=ntpd;; 41 esac 42fi 43 44# Debian has a seperate file for DHCP config to avoid stamping on 45# the master. 46if [ "$ntp_service" = ntpd ] && type invoke-rc.d >/dev/null 2>&1; then 47 [ -e /var/lib/ntp ] || mkdir /var/lib/ntp 48 : ${ntp_service:=ntp} 49 : ${NTP_DHCP_CONF:=/var/lib/ntp/ntp.conf.dhcp} 50fi 51 52: ${ntp_restart_cmd:=service_condcommand $ntp_service restart} 53 54ntp_conf=${NTP_CONF} 55NL=" 56" 57 58build_ntp_conf() 59{ 60 cf="$state_dir/ntp.conf.$ifname" 61 62 # Build a list of interfaces 63 interfaces=$(list_interfaces "$ntp_conf_dir") 64 65 servers= 66 if [ -n "$interfaces" ]; then 67 # Build the header 68 for x in ${interfaces}; do 69 header="$header${header:+, }$x" 70 done 71 72 # Build a server list 73 srvs=$(cd "$ntp_conf_dir"; 74 key_get_value "server " $interfaces) 75 if [ -n "$srvs" ]; then 76 for x in $(uniqify $srvs); do 77 servers="${servers}server $x$NL" 78 done 79 fi 80 fi 81 82 # Merge our config into ntp.conf 83 [ -e "$cf" ] && rm -f "$cf" 84 [ -d "$ntp_conf_dir" ] || mkdir -p "$ntp_conf_dir" 85 86 if [ -n "$NTP_DHCP_CONF" ]; then 87 [ -e "$ntp_conf" ] && cp "$ntp_conf" "$cf" 88 ntp_conf="$NTP_DHCP_CONF" 89 elif [ -e "$ntp_conf" ]; then 90 remove_markers "$signature_base" "$signature_base_end" \ 91 "$ntp_conf" > "$cf" 92 fi 93 94 if [ -n "$servers" ]; then 95 echo "$signature_base${header:+ $from }$header" >> "$cf" 96 printf %s "$servers" >> "$cf" 97 echo "$signature_base_end${header:+ $from }$header" >> "$cf" 98 else 99 [ -e "$ntp_conf" -a -e "$cf" ] || return 100 fi 101 102 # If we changed anything, restart ntpd 103 if change_file "$ntp_conf" "$cf"; then 104 [ -n "$ntp_restart_cmd" ] && eval $ntp_restart_cmd 105 fi 106} 107 108add_ntp_conf() 109{ 110 cf="$ntp_conf_dir/$ifname" 111 112 [ -e "$cf" ] && rm "$cf" 113 [ -d "$ntp_conf_dir" ] || mkdir -p "$ntp_conf_dir" 114 if [ -n "$new_ntp_servers" ]; then 115 for x in $new_ntp_servers; do 116 echo "server $x" >> "$cf" 117 done 118 fi 119 build_ntp_conf 120} 121 122remove_ntp_conf() 123{ 124 if [ -e "$ntp_conf_dir/$ifname" ]; then 125 rm "$ntp_conf_dir/$ifname" 126 fi 127 build_ntp_conf 128} 129 130# For ease of use, map DHCP6 names onto our DHCP4 names 131case "$reason" in 132BOUND6|RENEW6|REBIND6|REBOOT6|INFORM6) 133 new_ntp_servers="$new_dhcp6_sntp_servers" 134;; 135esac 136 137if $if_up; then 138 add_ntp_conf 139elif $if_down; then 140 remove_ntp_conf 141fi 142