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346 lines
9.5 KiB
Plaintext
346 lines
9.5 KiB
Plaintext
/* -*- Mode: Text -*- */
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autogen definitions options;
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#include copyright.def
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#include homerc.def
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#include autogen-version.def
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prog-name = "ntpq";
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prog-title = "standard NTP query program";
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argument = '[ host ...]';
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test-main;
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flag = {
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name = ipv4;
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value = 4;
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equivalence = ipv4;
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descrip = "Force IPv4 DNS name resolution";
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doc = <<- _EndOfDoc_
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Force DNS resolution of following host names on the command line
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to the IPv4 namespace.
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_EndOfDoc_;
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};
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flag = {
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name = ipv6;
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value = 6;
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equivalence = ipv4;
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descrip = "Force IPv6 DNS name resolution";
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doc = <<- _EndOfDoc_
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Force DNS resolution of following host names on the command line
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to the IPv6 namespace.
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_EndOfDoc_;
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};
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flag = {
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name = command;
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value = c;
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arg-type = string;
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descrip = "run a command and exit";
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max = NOLIMIT;
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arg-name = cmd;
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stack-arg;
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doc = <<- _EndOfDoc_
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The following argument is interpreted as an interactive format command
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and is added to the list of commands to be executed on the specified
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host(s).
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_EndOfDoc_;
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};
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#include debug-opt.def
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flag = {
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name = peers;
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value = p;
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descrip = "Print a list of the peers";
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flags-cant = interactive;
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doc = <<- _EndOfDoc_
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Print a list of the peers known to the server as well as a summary
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of their state. This is equivalent to the 'peers' interactive command.
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_EndOfDoc_;
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};
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flag = {
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name = interactive;
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value = i;
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flags-cant = command, peers;
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descrip = "Force ntpq to operate in interactive mode";
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doc = <<- _EndOfDoc_
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Force ntpq to operate in interactive mode. Prompts will be written
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to the standard output and commands read from the standard input.
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_EndOfDoc_;
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};
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flag = {
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name = numeric;
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value = n;
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descrip = "numeric host addresses";
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doc = <<- _EndOfDoc_
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Output all host addresses in dotted-quad numeric format rather than
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converting to the canonical host names.
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_EndOfDoc_;
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};
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detail = <<- _END_DETAIL
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The
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[= prog-name =]
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utility program is used to query NTP servers which
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implement the standard NTP mode 6 control message formats defined
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in Appendix B of the NTPv3 specification RFC1305, requesting
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information about current state and/or changes in that state.
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The same formats are used in NTPv4, although some of the
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variables have changed and new ones added.
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_END_DETAIL;
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prog-man-descrip = <<- _END_PROG_MAN_DESCRIP
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The
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[= prog-name =]
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utility program is used to query NTP servers which
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implement the standard NTP mode 6 control message formats defined
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in Appendix B of the NTPv3 specification RFC1305, requesting
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information about current state and/or changes in that state.
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The same formats are used in NTPv4, although some of the
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variables have changed and new ones added. The description on this
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page is for the NTPv4 variables.
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The program may be run either in interactive mode or controlled using
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command line arguments.
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Requests to read and write arbitrary
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variables can be assembled, with raw and pretty-printed output
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options being available.
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The
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[= prog-name =]
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utility can also obtain and print a
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list of peers in a common format by sending multiple queries to the
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server.
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If one or more request options is included on the command line
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when
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[= prog-name =]
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is executed, each of the requests will be sent
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to the NTP servers running on each of the hosts given as command
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line arguments, or on localhost by default.
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If no request options
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are given,
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[= prog-name =]
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will attempt to read commands from the
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standard input and execute these on the NTP server running on the
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first host given on the command line, again defaulting to localhost
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when no other host is specified.
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The
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[= prog-name =]
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utility will prompt for
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commands if the standard input is a terminal device.
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The
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[= prog-name =]
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utility uses NTP mode 6 packets to communicate with the
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NTP server, and hence can be used to query any compatible server on
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the network which permits it.
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Note that since NTP is a UDP protocol
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this communication will be somewhat unreliable, especially over
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large distances in terms of network topology.
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The
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[= prog-name =]
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utility makes
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one attempt to retransmit requests, and will time requests out if
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the remote host is not heard from within a suitable timeout
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time.
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Specifying a
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command line option other than
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.Fl i
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or
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.Fl n
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will
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cause the specified query (queries) to be sent to the indicated
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host(s) immediately.
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Otherwise,
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[= prog-name =]
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will attempt to read
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interactive format commands from the standard input.
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.Ss "Internal Commands"
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Interactive format commands consist of a keyword followed by zero
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to four arguments.
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Only enough characters of the full keyword to
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uniquely identify the command need be typed.
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A
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number of interactive format commands are executed entirely within
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the
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[= prog-name =]
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utility itself and do not result in NTP mode 6
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requests being sent to a server.
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These are described following.
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@table @code
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@item ? [command_keyword]
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@itemx help [command_keyword]
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A
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.Ql \&?
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by itself will print a list of all the command
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keywords known to this incarnation of
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[= prog-name =] .
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A
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.Ql \&?
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followed by a command keyword will print function and usage
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information about the command.
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This command is probably a better
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source of information about
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[= prog-name =]
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than this manual
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page.
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@item addvars
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.Ar variable_name [=value] ...
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.Xc
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@item rmvars variable_name ...
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@item clearvars
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The data carried by NTP mode 6 messages consists of a list of
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items of the form
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.Ql variable_name=value ,
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where the
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.Ql =value
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is ignored, and can be omitted,
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in requests to the server to read variables.
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The
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[= prog-name =]
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utility maintains an internal list in which data to be included in control
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messages can be assembled, and sent using the
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.Ic readlist
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and
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.Ic writelist
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commands described below.
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The
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.Ic addvars
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command allows variables and their optional values to be added to
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the list.
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If more than one variable is to be added, the list should
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be comma-separated and not contain white space.
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The
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.Ic rmvars
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command can be used to remove individual variables from the list,
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while the
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.Ic clearlist
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command removes all variables from the
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list.
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@item authenticate [ yes | no ]
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Normally
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[= prog-name =]
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does not authenticate requests unless
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they are write requests.
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The command
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.Ql authenticate yes
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causes
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[= prog-name =]
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to send authentication with all requests it
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makes.
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Authenticated requests causes some servers to handle
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requests slightly differently, and can occasionally melt the CPU in
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fuzzballs if you turn authentication on before doing a
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.Ic peer
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display.
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The command
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.Ql authenticate
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causes
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[= prog-name =]
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to display whether or not
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[= prog-name =]
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is currently autheinticating requests.
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@item cooked
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Causes output from query commands to be "cooked", so that
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variables which are recognized by
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[= prog-name =]
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will have their
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values reformatted for human consumption.
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Variables which
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[= prog-name =]
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thinks should have a decodable value but didn't are
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marked with a trailing
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.Ql \&? .
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.@item debug [
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.Cm more |
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.Cm less |
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.Cm off
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]
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.Xc
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With no argument, displays the current debug level.
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Otherwise, the debug level is changed to the indicated level.
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@item delay milliseconds
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Specify a time interval to be added to timestamps included in
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requests which require authentication.
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This is used to enable
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(unreliable) server reconfiguration over long delay network paths
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or between machines whose clocks are unsynchronized.
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Actually the
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server does not now require timestamps in authenticated requests,
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so this command may be obsolete.
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@item host hostname
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Set the host to which future queries will be sent.
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Hostname may
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be either a host name or a numeric address.
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@item hostnames Cm yes | Cm no
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If
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.Cm yes
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is specified, host names are printed in
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information displays.
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If
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.Cm no
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is specified, numeric
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addresses are printed instead.
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The default is
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.Cm yes ,
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unless
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modified using the command line
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.Fl n
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switch.
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@item keyid keyid
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This command allows the specification of a key number to be
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used to authenticate configuration requests.
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This must correspond
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to a key number the server has been configured to use for this
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purpose.
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@item ntpversion [
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.Cm 1 |
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.Cm 2 |
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.Cm 3 |
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.Cm 4
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]
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.Xc
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Sets the NTP version number which
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[= prog-name =]
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claims in
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packets.
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Defaults to 3, Note that mode 6 control messages (and
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modes, for that matter) didn't exist in NTP version 1.
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There appear
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to be no servers left which demand version 1.
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With no argument, displays the current NTP version that will be used
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when communicating with servers.
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@item quit
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Exit
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[= prog-name =] .
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@item passwd
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This command prompts you to type in a password (which will not
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be echoed) which will be used to authenticate configuration
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requests.
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The password must correspond to the key configured for
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use by the NTP server for this purpose if such requests are to be
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successful.
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@item raw
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Causes all output from query commands is printed as received
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from the remote server.
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The only formating/interpretation done on
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the data is to transform nonascii data into a printable (but barely
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understandable) form.
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@item timeout Ar milliseconds
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Specify a timeout period for responses to server queries.
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The
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default is about 5000 milliseconds.
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Note that since
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[= prog-name =]
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retries each query once after a timeout, the total waiting time for
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a timeout will be twice the timeout value set.
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@end table
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_END_PROG_MAN_DESCRIP;
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