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ActiveTcl User Guide
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ntp_time(n) 1.0.0 "ntp"
ntp_time - Tcl Time Service Client
package require Tcl 8.2
package require time ?1.0.0?
This package implements a client for the RFC 868 TIME protocol
(http://www.rfc-editor.org/rfc/rfc868.txt).
This simple protocol returns the time in seconds since 1 January
1900 to either tcp or udp clients.
- ::time::gettime ?options? timeserver ?port?
- Get the time from timeserver. You may
specify any of the options listed for the configure command here. This command returns a token
which must then be used with the remaining commands in this
package. Once you have finished, you should use cleanup to release all resources.
- ::time::configure ?options?
- Called with no arguments this command returns all the current
configuration options and values. Otherwise it should be called
with pairs of option name and value.
- -protocol number
- Set the default network protocol. This defaults to udp if the
tcludp package is available. Otherwise it will use tcp.
- -port number
- Set the default port to use. RFC 868 uses port 37.
- -timeout number
- Set the default timeout value in milliseconds. The default is
10 seconds.
- -command number
- Set a command procedure to be run when a reply is received. The
procedure is called with the time token appended to the argument
list.
- -loglevel number
- Set the logging level. The default is 'warning'.
- ::time::cget name
- Get the current value for the named configuration option.
- ::time::unixtime token
- Format the returned time for the unix epoch. RFC 868 time
defines time 0 as 1 Jan 1900, while unix time defines time 0 as 1
Jan 1970. This command converts the reply to unix time.
- ::time::status token
- Returns the status flag. For a successfully completed query
this will be ok. May be error or timeout
or eof. See also ::time::error
- ::time::error token
- Returns the error message provided for requests whose status is
error. If there is no error message then an empty string
is returned.
- ::time::reset token ?reason?
- Reset or cancel the query optionally specfying the reason to
record for the error command.
- ::time::wait token
- Wait for a query to complete and return the status upon
completion.
- ::time::cleanup token
- Remove all state variables associated with the request.
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% set tok [::time::gettime ntp2a.mcc.ac.uk]
% set t [::time::unixtime $tok]
% ::time::cleanup $tok
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Pat Thoyts
ntp
NTP , rfc 868 , time
Copyright © 2002, Pat Thoyts
<patthoyts@users.sourceforge.net>