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@node sntp Invocation @section Invoking sntp @pindex sntp @cindex standard SNTP program @ignore # # EDIT THIS FILE WITH CAUTION (sntp-opts.texi) # # It has been AutoGen-ed Tuesday December 8, 2009 at 08:14:51 AM EST # From the definitions sntp-opts.def # and the template file aginfo.tpl @end ignore This program has no explanation. .I sntp can be used as a SNTP client to query a NTP or SNTP server and either display the time or set the local system's time (given suitable privilege). It can be run as an interactive command or in a .I cron job. NTP is the Network Time Protocol (RFC 1305) and SNTP is the Simple Network Time Protocol (RFC 2030, which supersedes RFC 1769). This section was generated by @strong{AutoGen}, the aginfo template and the option descriptions for the @command{sntp} program. It documents the sntp usage text and option meanings. This software is released under a specialized copyright license. @menu * sntp usage:: sntp usage help (-?) * sntp adjtime:: adjtime option (-a) * sntp extraverbose:: extraverbose option (-V) * sntp ipv4:: ipv4 option (-4) * sntp ipv6:: ipv6 option (-6) * sntp megaverbose:: megaverbose option (-W) * sntp normalverbose:: normalverbose option (-v) * sntp settimeofday:: settimeofday option (-r) * sntp unprivport:: unprivport option (-u) @end menu @node sntp usage @subsection sntp usage help (-?) @cindex sntp usage This is the automatically generated usage text for sntp: @exampleindent 0 @example sntp - standard SNTP program - Ver. 4.2.5p247-RC USAGE: sntp [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]... ... Flg Arg Option-Name Description -4 no ipv4 Force IPv4 DNS name resolution - prohibits these options: ipv6 -6 no ipv6 Force IPv6 DNS name resolution - prohibits these options: ipv4 -d no normalverbose Normal verbose -K Str kod KoD history filename -p no syslog Logging with syslog - prohibits these options: filelog -l Str filelog Logging to specified logfile - prohibits these options: syslog -s no settod Set (step) the time with settimeofday() - prohibits these options: adjtime -j no adjtime Set (slew) the time with adjtime() - prohibits these options: settod -b Str broadcast Use broadcasts to the address specified for synchronisation -t Num timeout Specify the number of seconds to wait for broadcasts -a Num authentication Enable authentication with the key keyno. This option is used as -a keyno -k Str keyfile Specify a keyfile. SNTP will look in this file for the key specified with -a opt version Output version information and exit -? no help Display extended usage information and exit -! no more-help Extended usage information passed thru pager -> opt save-opts Save the option state to a config file -< Str load-opts Load options from a config file - disabled as --no-load-opts - may appear multiple times 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: - reading file /users/stenn/.ntprc - reading file /deacon/backroom/snaps/ntp-stable/sntp/.ntprc - examining environment variables named SNTP_* .I sntp can be used as a SNTP client to query a NTP or SNTP server and either display the time or set the local system's time (given suitable privilege). It can be run as an interactive command or in a .I cron job. NTP is the Network Time Protocol (RFC 1305) and SNTP is the Simple Network Time Protocol (RFC 2030, which supersedes RFC 1769). please send bug reports to: http://bugs.ntp.org, bugs@@ntp.org @end example @exampleindent 4 @node sntp ipv4 @subsection ipv4 option (-4) @cindex sntp-ipv4 This is the ``force ipv4 dns name resolution'' option. This option has some usage constraints. It: @itemize @bullet @item is a member of the ipv4 class of options. @end itemize Force DNS resolution of following host names on the command line to the IPv4 namespace. @node sntp ipv6 @subsection ipv6 option (-6) @cindex sntp-ipv6 This is the ``force ipv6 dns name resolution'' option. This option has some usage constraints. It: @itemize @bullet @item is a member of the ipv4 class of options. @end itemize Force DNS resolution of following host names on the command line to the IPv6 namespace. @node sntp unprivport @subsection unprivport option (-u) @cindex sntp-unprivport This is the ``use an unprivileged port'' option. Use an unprivilegded UDP port for our queries. @node sntp normalverbose @subsection normalverbose option (-v) @cindex sntp-normalverbose This is the ``slightly verbose'' option. This option has some usage constraints. It: @itemize @bullet @item must not appear in combination with any of the following options: extraverbose, megaverbose. @end itemize Diagnostic messages for non-fatal errors and a limited amount of tracing should be written to standard error. Fatal ones always produce a diagnostic. This option should be set when there is a suspected problem with the server, network or the source. @node sntp extraverbose @subsection extraverbose option (-V) @cindex sntp-extraverbose This is the ``extra verbose'' option. This option has some usage constraints. It: @itemize @bullet @item must not appear in combination with any of the following options: normalverbose, megaverbose. @end itemize Produce more and less comprehensible output, mainly for investigating problems with apparently inconsistent timestamps. This option should be set when the program fails with a message indicating that is the trouble. @node sntp megaverbose @subsection megaverbose option (-W) @cindex sntp-megaverbose This is the ``mega verbose'' option. This option has some usage constraints. It: @itemize @bullet @item must not appear in combination with any of the following options: normalverbose, extraverbose. @end itemize Very verbose debugging output that will interfere with the timing when writing to the terminal (because of line buffered output from C). Note that the times produced by this are the corrections needed, and not the error in the local clock. This option should be set only when debugging the source. @node sntp settimeofday @subsection settimeofday option (-r) @cindex sntp-settimeofday This is the ``set (step) the time with settimeofday()'' option. This option has some usage constraints. It: @itemize @bullet @item must not appear in combination with any of the following options: adjtime. @end itemize @node sntp adjtime @subsection adjtime option (-a) @cindex sntp-adjtime This is the ``set (slew) the time with adjtime()'' option. This option has some usage constraints. It: @itemize @bullet @item must not appear in combination with any of the following options: settimeofday. @end itemize