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Current Path: /usr/src/libexec/rc/rc.d

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📄 zvol(736 B)

Editing: ntpd

#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: ntpd
# REQUIRE: DAEMON ntpdate FILESYSTEMS devfs
# BEFORE:  LOGIN
# KEYWORD: nojail shutdown

. /etc/rc.subr

name="ntpd"
desc="Network Time Protocol daemon"
rcvar="ntpd_enable"
command="/usr/sbin/${name}"
extra_commands="fetch needfetch"
fetch_cmd="ntpd_fetch_leapfile"
needfetch_cmd="ntpd_needfetch_leapfile"
start_precmd="ntpd_precmd"

_ntp_tmp_leapfile="/var/run/ntpd.leap-seconds.list"
_ntp_default_dir="/var/db/ntp"
_ntp_default_driftfile="${_ntp_default_dir}/ntpd.drift"
_ntp_old_driftfile="/var/db/ntpd.drift"

pidfile="${_ntp_default_dir}/${name}.pid"

load_rc_config $name

leapfile_is_disabled() {
	# Return true (0) if automatic leapfile handling is disabled.
	case "$ntp_db_leapfile" in
	[Nn][Oo] | [Nn][Oo][Nn][Ee] )
		return 0;;
	* )
		return 1;;
	esac
}

can_run_nonroot()
{
	# If the admin set what uid to use, we don't change it.
	if [ -n "${ntpd_user}" ]; then
		return 1
	fi

# If the admin set any command line options involving files, we
	# may not be able to access them as user ntpd.
	case "${rc_flags}" in
	    *-f* | *--driftfile* | *-i* | *--jaildir*   | \
	    *-k* | *--keyfile*   | *-l* | *--logfile*   | \
	    *-p* | *--pidfile*   | *-s* | *--statsdir* )
		return 1;;
	esac

# If the admin set any options in ntp.conf involving files,
	# we may not be able to access them as user ntpd.
	local fileopts="^[ \t]*crypto|^[ \t]*driftfile|^[ \t]*key|^[ \t]*logfile|^[ \t]*statsdir"
	grep -E -q "${fileopts}" "${ntpd_config}" && return 1

# Try to set up the the MAC ntpd policy so ntpd can run with reduced
	# privileges.  Detect whether MAC is compiled into the kernel, load
	# the policy module if not already present, then check whether the
	# policy has been disabled via tunable or sysctl.
	[ -n "$(sysctl -qn security.mac.version)" ] || return 1
	sysctl -qn security.mac.ntpd >/dev/null || kldload -qn mac_ntpd || return 1
	[ "$(sysctl -qn security.mac.ntpd.enabled)" == "1" ] || return 1

# On older existing systems, the ntp dir may by owned by root, change
	# it to ntpd to give the daemon create/write access to the driftfile.
	if [ "$(stat -f %u ${_ntp_default_dir})" = "0" ]; then
		chown ntpd:ntpd "${_ntp_default_dir}" || return 1
		chmod 0755 "${_ntp_default_dir}" || return 1
		logger -s -t "rc.d/ntpd" -p daemon.notice \
		    "${_ntp_default_dir} updated to owner ntpd:ntpd, mode 0755"
	fi

# If the driftfile exists in the standard location for older existing
	# systems, move it into the ntp dir and fix the ownership if we can.
	if [ -f "${_ntp_old_driftfile}" ] && [ ! -L "${_ntp_old_driftfile}" ]; then
		mv "${_ntp_old_driftfile}" "${_ntp_default_driftfile}" &&
		   chown ntpd:ntpd "${_ntp_default_driftfile}" || return 1
		logger -s -t "rc.d/ntpd" -p daemon.notice \
		    "${_ntp_default_driftfile} updated to owner ntpd:ntpd"
		logger -s -t "rc.d/ntpd" -p daemon.notice \
		    "${_ntp_old_driftfile} moved to ${_ntp_default_driftfile}"
	fi
}

ntpd_precmd()
{
	local driftopt

# If we can run as a non-root user, switch uid to ntpd and use the
	# new default location for the driftfile inside the ntpd-owned dir.
	# Otherwise, figure out what to do about the driftfile option.  If set
	# by the admin, we don't add the option.  If the file exists in the old
	# default location we use that, else we use the new default location.
	if can_run_nonroot; then
		_user="ntpd"
		driftopt="-f ${_ntp_default_driftfile}"
	elif grep -q "^[ \t]*driftfile" "${ntpd_config}" ||
	     [ -n "${rc_flags}" ] &&
	     ( [ -z "${rc_flags##*-f*}" ] ||
	       [ -z "${rc_flags##*--driftfile*}" ] ); then
		driftopt="" # admin set the option, we don't need to add it.
	elif [ -f "${_ntp_old_driftfile}" ]; then
		driftopt="-f ${_ntp_old_driftfile}"
	else
		driftopt="-f ${_ntp_default_driftfile}"
	fi

# Set command_args based on the various config vars.
	command_args="-p ${pidfile} -c ${ntpd_config} ${driftopt}"
	if checkyesno ntpd_sync_on_start; then
		command_args="${command_args} -g"
	fi

# Make sure the leapfile is ready to use, unless leapfile
	# handling is disabled.
	if leapfile_is_disabled; then
		return
	fi

ntpd_init_leapfile
	if [ ! -f "${ntp_db_leapfile}" ]; then
		ntpd_fetch_leapfile
	fi
}

current_ntp_ts() {
	# Seconds between 1900-01-01 and 1970-01-01
	# echo $(((70*365+17)*86400))
	ntp_to_unix=2208988800

echo $(($(date -u +%s)+$ntp_to_unix))
}
	
get_ntp_leapfile_ver() {
	# Leapfile update date (version number).
	expr "$(awk '$1 == "#$" { print $2 }' "$1" 2>/dev/null)" : \
		'^$[1-9][0-9]*$$' \| 0
}

get_ntp_leapfile_expiry() {
	# Leapfile expiry date.
	expr "$(awk '$1 == "#@" { print $2 }' "$1" 2>/dev/null)" : \
		'^$[1-9][0-9]*$$' \| 0
}

ntpd_init_leapfile() {

if leapfile_is_disabled; then
		return
	fi

# Refresh working leapfile with an invalid hash due to
	# FreeBSD id header. Ntpd will ignore leapfiles with a
	# mismatch hash. The file must be the virgin file from
	# the source.
	if [ ! -f $ntp_db_leapfile ]; then
		cp -p $ntp_src_leapfile $ntp_db_leapfile
	fi
}

ntpd_needfetch_leapfile() {
	local rc verbose

if leapfile_is_disabled; then
		# Return code 1: ntp leapfile fetch not needed
		return 1
	fi

if checkyesno ntp_leapfile_fetch_verbose; then
		verbose=echo
	else
		verbose=:
	fi

ntp_ver_no_src=$(get_ntp_leapfile_ver $ntp_src_leapfile)
	ntp_expiry_src=$(get_ntp_leapfile_expiry $ntp_src_leapfile)
	ntp_ver_no_db=$(get_ntp_leapfile_ver $ntp_db_leapfile)
	ntp_expiry_db=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
	$verbose ntp_src_leapfile version is $ntp_ver_no_src expires $ntp_expiry_src
	$verbose ntp_db_leapfile version is $ntp_ver_no_db expires $ntp_expiry_db

if [ "$ntp_ver_no_src" -gt "$ntp_ver_no_db" -o \
	     "$ntp_ver_no_src" -eq "$ntp_ver_no_db" -a \
	     "$ntp_expiry_src" -gt "$ntp_expiry_db" ]; then
		$verbose replacing $ntp_db_leapfile with $ntp_src_leapfile 
		cp -p $ntp_src_leapfile $ntp_db_leapfile
		ntp_ver_no_db=$ntp_ver_no_src
	else
		$verbose not replacing $ntp_db_leapfile with $ntp_src_leapfile 
	fi
	ntp_leapfile_expiry_seconds=$((ntp_leapfile_expiry_days*86400))
	ntp_leap_expiry=$(get_ntp_leapfile_expiry $ntp_db_leapfile)
	ntp_leap_fetch_date=$((ntp_leap_expiry-ntp_leapfile_expiry_seconds))
	if [ $(current_ntp_ts) -ge $ntp_leap_fetch_date ]; then
		$verbose Within ntp leapfile expiry limit, initiating fetch
		# Return code 0: ntp leapfile fetch needed
		return 0
	fi
	# Return code 1: ntp leapfile fetch not needed
	return 1
}

ntpd_fetch_leapfile() {

if leapfile_is_disabled; then
		return
	fi

if checkyesno ntp_leapfile_fetch_verbose; then
		verbose=echo
	else
		verbose=:
	fi

if ntpd_needfetch_leapfile ; then
		for url in $ntp_leapfile_sources ; do
			$verbose fetching $url
			fetch $ntp_leapfile_fetch_opts -o $_ntp_tmp_leapfile $url && break
		done
		ntp_ver_no_tmp=$(get_ntp_leapfile_ver $_ntp_tmp_leapfile)
		ntp_expiry_tmp=$(get_ntp_leapfile_expiry $_ntp_tmp_leapfile)
		if [ "$ntp_expiry_tmp" -gt "$ntp_expiry_db" -o \
		     "$ntp_expiry_tmp" -eq "$ntp_expiry_db" -a \
		     "$ntp_ver_no_tmp" -gt "$ntp_ver_no_db" ]; then
			$verbose using $url as $ntp_db_leapfile
			mv -f $_ntp_tmp_leapfile $ntp_db_leapfile ||
			    $verbose "warning: cannot replace $ntp_db_leapfile (read-only fs?)"
		else
			$verbose using existing $ntp_db_leapfile
		fi
	fi
}

run_rc_command "$1"

003 File Manager

Editing: ntpd

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