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 separate file for DHCP config to avoid stamping on 45# the master. 46if [ "$ntp_service" = ntpd ] && command -v 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 header= 66 servers= 67 if [ -n "$interfaces" ]; then 68 # Build the header 69 for x in ${interfaces}; do 70 header="$header${header:+, }$x" 71 done 72 73 # Build a server list 74 srvs=$(cd "$ntp_conf_dir"; 75 key_get_value "server " $interfaces) 76 if [ -n "$srvs" ]; then 77 for x in $(uniqify $srvs); do 78 servers="${servers}server $x$NL" 79 done 80 fi 81 fi 82 83 # Merge our config into ntp.conf 84 [ -e "$cf" ] && rm -f "$cf" 85 [ -d "$ntp_conf_dir" ] || mkdir -p "$ntp_conf_dir" 86 87 if [ -n "$NTP_DHCP_CONF" ]; then 88 [ -e "$ntp_conf" ] && cp "$ntp_conf" "$cf" 89 ntp_conf="$NTP_DHCP_CONF" 90 elif [ -e "$ntp_conf" ]; then 91 remove_markers "$signature_base" "$signature_base_end" \ 92 "$ntp_conf" > "$cf" 93 fi 94 95 if [ -n "$servers" ]; then 96 echo "$signature_base${header:+ $from }$header" >> "$cf" 97 printf %s "$servers" >> "$cf" 98 echo "$signature_base_end${header:+ $from }$header" >> "$cf" 99 else 100 [ -e "$ntp_conf" ] && [ -e "$cf" ] || return 101 fi 102 103 # If we changed anything, restart ntpd 104 if change_file "$ntp_conf" "$cf"; then 105 [ -n "$ntp_restart_cmd" ] && eval $ntp_restart_cmd 106 fi 107} 108 109add_ntp_conf() 110{ 111 cf="$ntp_conf_dir/$ifname" 112 113 [ -e "$cf" ] && rm "$cf" 114 [ -d "$ntp_conf_dir" ] || mkdir -p "$ntp_conf_dir" 115 if [ -n "$new_ntp_servers" ]; then 116 for x in $(uniqify $new_ntp_servers); do 117 echo "server $x" >> "$cf" 118 done 119 fi 120 build_ntp_conf 121} 122 123remove_ntp_conf() 124{ 125 if [ -e "$ntp_conf_dir/$ifname" ]; then 126 rm "$ntp_conf_dir/$ifname" 127 fi 128 build_ntp_conf 129} 130 131# For ease of use, map DHCP6 names onto our DHCP4 names 132case "$reason" in 133BOUND6|RENEW6|REBIND6|REBOOT6|INFORM6) 134 new_ntp_servers="$new_dhcp6_sntp_servers $new_dhcp6_ntp_server_addr $new_dhcp6_ntp_server_fqdn" 135;; 136esac 137 138if $if_configured; then 139 if $if_up; then 140 add_ntp_conf 141 elif $if_down; then 142 remove_ntp_conf 143 fi 144fi 145