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authorGleb Smirnoff <glebius@FreeBSD.org>2015-10-26 11:42:25 +0000
committerGleb Smirnoff <glebius@FreeBSD.org>2015-10-26 11:42:25 +0000
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tree87ec8a7d959d10b98fa9068d0c72ebea6c14f0fb /contrib/ntp/ntpd/invoke-ntpd.texi
parent9f2ff1c7f301609664a1ef5f55688b9254c1b424 (diff)
downloadsrc-009e7aaa36cdc634402b808846ff82869c79b076.tar.gz
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Upgrade NTP to 4.2.8p4.
Security: FreeBSD-SA-15:25.ntp Security: CVE-2015-7871 Security: CVE-2015-7855 Security: CVE-2015-7854 Security: CVE-2015-7853 Security: CVE-2015-7852 Security: CVE-2015-7851 Security: CVE-2015-7850 Security: CVE-2015-7849 Security: CVE-2015-7848 Security: CVE-2015-7701 Security: CVE-2015-7703 Security: CVE-2015-7704, CVE-2015-7705 Security: CVE-2015-7691, CVE-2015-7692, CVE-2015-7702 Approved by: so
Notes
Notes: svn path=/releng/9.3/; revision=290001
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+@node ntpd Invocation
+@section Invoking ntpd
+@pindex ntpd
+@cindex NTP daemon program
+@ignore
+#
+# EDIT THIS FILE WITH CAUTION (invoke-ntpd.texi)
+#
+# It has been AutoGen-ed October 21, 2015 at 12:38:21 PM by AutoGen 5.18.5
+# From the definitions ntpd-opts.def
+# and the template file agtexi-cmd.tpl
+@end ignore
+
+
+
+The
+@code{ntpd}
+utility is an operating system daemon which sets
+and maintains the system time of day in synchronism with Internet
+standard time servers.
+It is a complete implementation of the
+Network Time Protocol (NTP) version 4, as defined by RFC-5905,
+but also retains compatibility with
+version 3, as defined by RFC-1305, and versions 1
+and 2, as defined by RFC-1059 and RFC-1119, respectively.
+
+The
+@code{ntpd}
+utility does most computations in 64-bit floating point
+arithmetic and does relatively clumsy 64-bit fixed point operations
+only when necessary to preserve the ultimate precision, about 232
+picoseconds.
+While the ultimate precision is not achievable with
+ordinary workstations and networks of today, it may be required
+with future gigahertz CPU clocks and gigabit LANs.
+
+Ordinarily,
+@code{ntpd}
+reads the
+@code{ntp.conf(5)}
+configuration file at startup time in order to determine the
+synchronization sources and operating modes.
+It is also possible to
+specify a working, although limited, configuration entirely on the
+command line, obviating the need for a configuration file.
+This may
+be particularly useful when the local host is to be configured as a
+broadcast/multicast client, with all peers being determined by
+listening to broadcasts at run time.
+
+If NetInfo support is built into
+@code{ntpd}
+then
+@code{ntpd}
+will attempt to read its configuration from the
+NetInfo if the default
+@code{ntp.conf(5)}
+file cannot be read and no file is
+specified by the
+@code{-c}
+option.
+
+Various internal
+@code{ntpd}
+variables can be displayed and
+configuration options altered while the
+@code{ntpd}
+is running
+using the
+@code{ntpq(1ntpqmdoc)}
+and
+@code{ntpdc(1ntpdcmdoc)}
+utility programs.
+
+When
+@code{ntpd}
+starts it looks at the value of
+@code{umask(2)},
+and if zero
+@code{ntpd}
+will set the
+@code{umask(2)}
+to 022.
+
+This section was generated by @strong{AutoGen},
+using the @code{agtexi-cmd} template and the option descriptions for the @code{ntpd} program.
+This software is released under the NTP license, <http://ntp.org/license>.
+
+@menu
+* ntpd usage:: ntpd help/usage (@option{--help})
+* ntpd ipv4:: ipv4 option (-4)
+* ntpd ipv6:: ipv6 option (-6)
+* ntpd authreq:: authreq option (-a)
+* ntpd authnoreq:: authnoreq option (-A)
+* ntpd configfile:: configfile option (-c)
+* ntpd driftfile:: driftfile option (-f)
+* ntpd panicgate:: panicgate option (-g)
+* ntpd force-step-once:: force-step-once option (-G)
+* ntpd jaildir:: jaildir option (-i)
+* ntpd interface:: interface option (-I)
+* ntpd keyfile:: keyfile option (-k)
+* ntpd logfile:: logfile option (-l)
+* ntpd novirtualips:: novirtualips option (-L)
+* ntpd modifymmtimer:: modifymmtimer option (-M)
+* ntpd nice:: nice option (-N)
+* ntpd pidfile:: pidfile option (-p)
+* ntpd priority:: priority option (-P)
+* ntpd quit:: quit option (-q)
+* ntpd propagationdelay:: propagationdelay option (-r)
+* ntpd saveconfigquit:: saveconfigquit option
+* ntpd statsdir:: statsdir option (-s)
+* ntpd trustedkey:: trustedkey option (-t)
+* ntpd user:: user option (-u)
+* ntpd updateinterval:: updateinterval option (-U)
+* ntpd wait-sync:: wait-sync option (-w)
+* ntpd slew:: slew option (-x)
+* ntpd usepcc:: usepcc option
+* ntpd pccfreq:: pccfreq option
+* ntpd mdns:: mdns option (-m)
+* ntpd config:: presetting/configuring ntpd
+* ntpd exit status:: exit status
+* ntpd Usage:: Usage
+* ntpd Files:: Files
+* ntpd See Also:: See Also
+* ntpd Bugs:: Bugs
+* ntpd Notes:: Notes
+@end menu
+
+@node ntpd usage
+@subsection ntpd help/usage (@option{--help})
+@cindex ntpd help
+
+This is the automatically generated usage text for ntpd.
+
+The text printed is the same whether selected with the @code{help} option
+(@option{--help}) or the @code{more-help} option (@option{--more-help}). @code{more-help} will print
+the usage text by passing it through a pager program.
+@code{more-help} is disabled on platforms without a working
+@code{fork(2)} function. The @code{PAGER} environment variable is
+used to select the program, defaulting to @file{more}. Both will exit
+with a status code of 0.
+
+@exampleindent 0
+@example
+ntpd - NTP daemon program - Ver. 4.2.8p4
+Usage: ntpd [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]... \
+ [ <server1> ... <serverN> ]
+ Flg Arg Option-Name Description
+ -4 no ipv4 Force IPv4 DNS name resolution
+ - prohibits the option 'ipv6'
+ -6 no ipv6 Force IPv6 DNS name resolution
+ - prohibits the option 'ipv4'
+ -a no authreq Require crypto authentication
+ - prohibits the option 'authnoreq'
+ -A no authnoreq Do not require crypto authentication
+ - prohibits the option 'authreq'
+ -b no bcastsync Allow us to sync to broadcast servers
+ -c Str configfile configuration file name
+ -d no debug-level Increase debug verbosity level
+ - may appear multiple times
+ -D Num set-debug-level Set the debug verbosity level
+ - may appear multiple times
+ -f Str driftfile frequency drift file name
+ -g no panicgate Allow the first adjustment to be Big
+ - may appear multiple times
+ -G no force-step-once Step any initial offset correction.
+ -i Str jaildir Jail directory
+ -I Str interface Listen on an interface name or address
+ - may appear multiple times
+ -k Str keyfile path to symmetric keys
+ -l Str logfile path to the log file
+ -L no novirtualips Do not listen to virtual interfaces
+ -n no nofork Do not fork
+ - prohibits the option 'wait-sync'
+ -N no nice Run at high priority
+ -p Str pidfile path to the PID file
+ -P Num priority Process priority
+ -q no quit Set the time and quit
+ - prohibits these options:
+ saveconfigquit
+ wait-sync
+ -r Str propagationdelay Broadcast/propagation delay
+ Str saveconfigquit Save parsed configuration and quit
+ - prohibits these options:
+ quit
+ wait-sync
+ -s Str statsdir Statistics file location
+ -t Str trustedkey Trusted key number
+ - may appear multiple times
+ -u Str user Run as userid (or userid:groupid)
+ -U Num updateinterval interval in seconds between scans for new or dropped interfaces
+ Str var make ARG an ntp variable (RW)
+ - may appear multiple times
+ Str dvar make ARG an ntp variable (RW|DEF)
+ - may appear multiple times
+ -w Num wait-sync Seconds to wait for first clock sync
+ - prohibits these options:
+ nofork
+ quit
+ saveconfigquit
+ -x no slew Slew up to 600 seconds
+ opt version output version information and exit
+ -? no help display extended usage information and exit
+ -! no more-help extended usage information passed thru pager
+
+Options are specified by doubled hyphens and their name or by a single
+hyphen and the flag character.
+
+
+The following option preset mechanisms are supported:
+ - examining environment variables named NTPD_*
+
+Please send bug reports to: <http://bugs.ntp.org, bugs@@ntp.org>
+@end example
+@exampleindent 4
+
+@node ntpd ipv4
+@subsection ipv4 option (-4)
+@cindex ntpd-ipv4
+
+This is the ``force ipv4 dns name resolution'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must not appear in combination with any of the following options:
+ipv6.
+@end itemize
+
+Force DNS resolution of following host names on the command line
+to the IPv4 namespace.
+@node ntpd ipv6
+@subsection ipv6 option (-6)
+@cindex ntpd-ipv6
+
+This is the ``force ipv6 dns name resolution'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must not appear in combination with any of the following options:
+ipv4.
+@end itemize
+
+Force DNS resolution of following host names on the command line
+to the IPv6 namespace.
+@node ntpd authreq
+@subsection authreq option (-a)
+@cindex ntpd-authreq
+
+This is the ``require crypto authentication'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must not appear in combination with any of the following options:
+authnoreq.
+@end itemize
+
+Require cryptographic authentication for broadcast client,
+multicast client and symmetric passive associations.
+This is the default.
+@node ntpd authnoreq
+@subsection authnoreq option (-A)
+@cindex ntpd-authnoreq
+
+This is the ``do not require crypto authentication'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must not appear in combination with any of the following options:
+authreq.
+@end itemize
+
+Do not require cryptographic authentication for broadcast client,
+multicast client and symmetric passive associations.
+This is almost never a good idea.
+@node ntpd configfile
+@subsection configfile option (-c)
+@cindex ntpd-configfile
+
+This is the ``configuration file name'' option.
+This option takes a string argument.
+The name and path of the configuration file,
+@file{/etc/ntp.conf}
+by default.
+@node ntpd driftfile
+@subsection driftfile option (-f)
+@cindex ntpd-driftfile
+
+This is the ``frequency drift file name'' option.
+This option takes a string argument.
+The name and path of the frequency file,
+@file{/etc/ntp.drift}
+by default.
+This is the same operation as the
+@code{driftfile} @kbd{driftfile}
+configuration specification in the
+@file{/etc/ntp.conf}
+file.
+@node ntpd panicgate
+@subsection panicgate option (-g)
+@cindex ntpd-panicgate
+
+This is the ``allow the first adjustment to be big'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+may appear an unlimited number of times.
+@end itemize
+
+Normally,
+@code{ntpd}
+exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that,
+@code{ntpd}
+will exit with a message to the system log. This option can be used with the
+@code{-q}
+and
+@code{-x}
+options.
+See the
+@code{tinker}
+configuration file directive for other options.
+@node ntpd force-step-once
+@subsection force-step-once option (-G)
+@cindex ntpd-force-step-once
+
+This is the ``step any initial offset correction.'' option.
+Normally,
+@code{ntpd}
+steps the time if the time offset exceeds the step threshold,
+which is 128 ms by default, and otherwise slews the time.
+This option forces the initial offset correction to be stepped,
+so the highest time accuracy can be achieved quickly.
+However, this may also cause the time to be stepped back
+so this option must not be used if
+applications requiring monotonic time are running.
+See the @code{tinker} configuration file directive for other options.
+@node ntpd jaildir
+@subsection jaildir option (-i)
+@cindex ntpd-jaildir
+
+This is the ``jail directory'' option.
+This option takes a string argument.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{HAVE_DROPROOT} during the compilation.
+@end itemize
+
+Chroot the server to the directory
+@kbd{jaildir}
+.
+This option also implies that the server attempts to drop root privileges at startup.
+You may need to also specify a
+@code{-u}
+option.
+This option is only available if the OS supports adjusting the clock
+without full root privileges.
+This option is supported under NetBSD (configure with
+@code{--enable-clockctl}) or Linux (configure with
+@code{--enable-linuxcaps}) or Solaris (configure with @code{--enable-solarisprivs}).
+@node ntpd interface
+@subsection interface option (-I)
+@cindex ntpd-interface
+
+This is the ``listen on an interface name or address'' option.
+This option takes a string argument @file{iface}.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+may appear an unlimited number of times.
+@end itemize
+
+Open the network address given, or all the addresses associated with the
+given interface name. This option may appear multiple times. This option
+also implies not opening other addresses, except wildcard and localhost.
+This option is deprecated. Please consider using the configuration file
+@code{interface} command, which is more versatile.
+@node ntpd keyfile
+@subsection keyfile option (-k)
+@cindex ntpd-keyfile
+
+This is the ``path to symmetric keys'' option.
+This option takes a string argument.
+Specify the name and path of the symmetric key file.
+@file{/etc/ntp.keys}
+is the default.
+This is the same operation as the
+@code{keys} @kbd{keyfile}
+configuration file directive.
+@node ntpd logfile
+@subsection logfile option (-l)
+@cindex ntpd-logfile
+
+This is the ``path to the log file'' option.
+This option takes a string argument.
+Specify the name and path of the log file.
+The default is the system log file.
+This is the same operation as the
+@code{logfile} @kbd{logfile}
+configuration file directive.
+@node ntpd novirtualips
+@subsection novirtualips option (-L)
+@cindex ntpd-novirtualips
+
+This is the ``do not listen to virtual interfaces'' option.
+Do not listen to virtual interfaces, defined as those with
+names containing a colon. This option is deprecated. Please
+consider using the configuration file @code{interface} command, which
+is more versatile.
+@node ntpd modifymmtimer
+@subsection modifymmtimer option (-M)
+@cindex ntpd-modifymmtimer
+
+This is the ``modify multimedia timer (windows only)'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{SYS_WINNT} during the compilation.
+@end itemize
+
+Set the Windows Multimedia Timer to highest resolution. This
+ensures the resolution does not change while ntpd is running,
+avoiding timekeeping glitches associated with changes.
+@node ntpd nice
+@subsection nice option (-N)
+@cindex ntpd-nice
+
+This is the ``run at high priority'' option.
+To the extent permitted by the operating system, run
+@code{ntpd}
+at the highest priority.
+@node ntpd pidfile
+@subsection pidfile option (-p)
+@cindex ntpd-pidfile
+
+This is the ``path to the pid file'' option.
+This option takes a string argument.
+Specify the name and path of the file used to record
+@code{ntpd}'s
+process ID.
+This is the same operation as the
+@code{pidfile} @kbd{pidfile}
+configuration file directive.
+@node ntpd priority
+@subsection priority option (-P)
+@cindex ntpd-priority
+
+This is the ``process priority'' option.
+This option takes a number argument.
+To the extent permitted by the operating system, run
+@code{ntpd}
+at the specified
+@code{sched_setscheduler(SCHED_FIFO)}
+priority.
+@node ntpd quit
+@subsection quit option (-q)
+@cindex ntpd-quit
+
+This is the ``set the time and quit'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must not appear in combination with any of the following options:
+saveconfigquit, wait-sync.
+@end itemize
+
+@code{ntpd}
+will not daemonize and will exit after the clock is first
+synchronized. This behavior mimics that of the
+@code{ntpdate}
+program, which will soon be replaced with a shell script.
+The
+@code{-g}
+and
+@code{-x}
+options can be used with this option.
+Note: The kernel time discipline is disabled with this option.
+@node ntpd propagationdelay
+@subsection propagationdelay option (-r)
+@cindex ntpd-propagationdelay
+
+This is the ``broadcast/propagation delay'' option.
+This option takes a string argument.
+Specify the default propagation delay from the broadcast/multicast server to this client. This is necessary only if the delay cannot be computed automatically by the protocol.
+@node ntpd saveconfigquit
+@subsection saveconfigquit option
+@cindex ntpd-saveconfigquit
+
+This is the ``save parsed configuration and quit'' option.
+This option takes a string argument.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{SAVECONFIG} during the compilation.
+@item
+must not appear in combination with any of the following options:
+quit, wait-sync.
+@end itemize
+
+Cause @code{ntpd} to parse its startup configuration file and save an
+equivalent to the given filename and exit. This option was
+designed for automated testing.
+@node ntpd statsdir
+@subsection statsdir option (-s)
+@cindex ntpd-statsdir
+
+This is the ``statistics file location'' option.
+This option takes a string argument.
+Specify the directory path for files created by the statistics facility.
+This is the same operation as the
+@code{statsdir} @kbd{statsdir}
+configuration file directive.
+@node ntpd trustedkey
+@subsection trustedkey option (-t)
+@cindex ntpd-trustedkey
+
+This is the ``trusted key number'' option.
+This option takes a string argument @file{tkey}.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+may appear an unlimited number of times.
+@end itemize
+
+Add the specified key number to the trusted key list.
+@node ntpd user
+@subsection user option (-u)
+@cindex ntpd-user
+
+This is the ``run as userid (or userid:groupid)'' option.
+This option takes a string argument.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{HAVE_DROPROOT} during the compilation.
+@end itemize
+
+Specify a user, and optionally a group, to switch to.
+This option is only available if the OS supports adjusting the clock
+without full root privileges.
+This option is supported under NetBSD (configure with
+@code{--enable-clockctl}) or Linux (configure with
+@code{--enable-linuxcaps}) or Solaris (configure with @code{--enable-solarisprivs}).
+@node ntpd updateinterval
+@subsection updateinterval option (-U)
+@cindex ntpd-updateinterval
+
+This is the ``interval in seconds between scans for new or dropped interfaces'' option.
+This option takes a number argument.
+Give the time in seconds between two scans for new or dropped interfaces.
+For systems with routing socket support the scans will be performed shortly after the interface change
+has been detected by the system.
+Use 0 to disable scanning. 60 seconds is the minimum time between scans.
+@node ntpd wait-sync
+@subsection wait-sync option (-w)
+@cindex ntpd-wait-sync
+
+This is the ``seconds to wait for first clock sync'' option.
+This option takes a number argument.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{HAVE_WORKING_FORK} during the compilation.
+@item
+must not appear in combination with any of the following options:
+nofork, quit, saveconfigquit.
+@end itemize
+
+If greater than zero, alters @code{ntpd}'s behavior when forking to
+daemonize. Instead of exiting with status 0 immediately after
+the fork, the parent waits up to the specified number of
+seconds for the child to first synchronize the clock. The exit
+status is zero (success) if the clock was synchronized,
+otherwise it is @code{ETIMEDOUT}.
+This provides the option for a script starting @code{ntpd} to easily
+wait for the first set of the clock before proceeding.
+@node ntpd slew
+@subsection slew option (-x)
+@cindex ntpd-slew
+
+This is the ``slew up to 600 seconds'' option.
+Normally, the time is slewed if the offset is less than the step threshold, which is 128 ms by default, and stepped if above the threshold.
+This option sets the threshold to 600 s, which is well within the accuracy window to set the clock manually.
+Note: Since the slew rate of typical Unix kernels is limited to 0.5 ms/s, each second of adjustment requires an amortization interval of 2000 s.
+Thus, an adjustment as much as 600 s will take almost 14 days to complete.
+This option can be used with the
+@code{-g}
+and
+@code{-q}
+options.
+See the
+@code{tinker}
+configuration file directive for other options.
+Note: The kernel time discipline is disabled with this option.
+@node ntpd usepcc
+@subsection usepcc option
+@cindex ntpd-usepcc
+
+This is the ``use cpu cycle counter (windows only)'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{SYS_WINNT} during the compilation.
+@end itemize
+
+Attempt to substitute the CPU counter for @code{QueryPerformanceCounter}.
+The CPU counter and @code{QueryPerformanceCounter} are compared, and if
+they have the same frequency, the CPU counter (RDTSC on x86) is
+used directly, saving the overhead of a system call.
+@node ntpd pccfreq
+@subsection pccfreq option
+@cindex ntpd-pccfreq
+
+This is the ``force cpu cycle counter use (windows only)'' option.
+This option takes a string argument.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{SYS_WINNT} during the compilation.
+@end itemize
+
+Force substitution the CPU counter for @code{QueryPerformanceCounter}.
+The CPU counter (RDTSC on x86) is used unconditionally with the
+given frequency (in Hz).
+@node ntpd mdns
+@subsection mdns option (-m)
+@cindex ntpd-mdns
+
+This is the ``register with mdns as a ntp server'' option.
+
+@noindent
+This option has some usage constraints. It:
+@itemize @bullet
+@item
+must be compiled in by defining @code{HAVE_DNSREGISTRATION} during the compilation.
+@end itemize
+
+Registers as an NTP server with the local mDNS server which allows
+the server to be discovered via mDNS client lookup.
+
+
+@node ntpd config
+@subsection presetting/configuring ntpd
+
+Any option that is not marked as @i{not presettable} may be preset by
+loading values from environment variables named @code{NTPD} and @code{NTPD_<OPTION_NAME>}. @code{<OPTION_NAME>} must be one of
+the options listed above in upper case and segmented with underscores.
+The @code{NTPD} variable will be tokenized and parsed like
+the command line. The remaining variables are tested for existence and their
+values are treated like option arguments.
+
+
+The command line options relating to configuration and/or usage help are:
+
+@subsubheading version (-)
+
+Print the program version to standard out, optionally with licensing
+information, then exit 0. The optional argument specifies how much licensing
+detail to provide. The default is to print just the version. The licensing infomation may be selected with an option argument.
+Only the first letter of the argument is examined:
+
+@table @samp
+@item version
+Only print the version. This is the default.
+@item copyright
+Name the copyright usage licensing terms.
+@item verbose
+Print the full copyright usage licensing terms.
+@end table
+
+@node ntpd exit status
+@subsection ntpd exit status
+
+One of the following exit values will be returned:
+@table @samp
+@item 0 (EXIT_SUCCESS)
+Successful program execution.
+@item 1 (EXIT_FAILURE)
+The operation failed or the command syntax was not valid.
+@end table
+@node ntpd Usage
+@subsection ntpd Usage
+@node ntpd Files
+@subsection ntpd Files
+@node ntpd See Also
+@subsection ntpd See Also
+@node ntpd Bugs
+@subsection ntpd Bugs
+@node ntpd Notes
+@subsection ntpd Notes