update-leap(1) - man - phpMan

UPDATE_LEAP(1update-leapmdoc)        User        UPDATE_LEAP(1update-leapmdoc)

NAME
     update-leap — leap-seconds file manager/updater

SYNOPSIS
     update-leap [-flags] [-flag [value]] [--option-name[[=| ]value]]

                 All arguments must be options.

DESCRIPTION
     update-leap will validate the file currently on the local system and if necessary, updates
     leap-second definition file.

     Ordinarily, the file is found using the "leapfile" directive in ntp.conf(5).  However, an al‐
     ternate location can be specified on the command line.

     If the file does not exist, is not valid, has expired, or is expiring soon, a new copy will be
     downloaded.  If the new copy validates, it is installed and NTP is (optionally) restarted.

     If the current file is acceptable, no download or restart occurs.

     -c can also be used to invoke another script to perform administrative functions, e.g. to copy
     the file to other local systems.  This can be run as a cron job.  As the file is rarely up‐
     dated, and leap seconds are announced at least one month in advance (usually longer), it need
     not be run more frequently than about once every three weeks.  For cron-friendly behavior, de‐
     fine CRONJOB=1 in the crontab.  This script depends on$REQUIREDCMDS

OPTIONS
     -s string, --source-url=string
             The URL of the master copy of the leapseconds file.

             Specify the URL of the master copy to download $LEAPSRC

     -4, --ipv4
             Use only IPv4 addresses for DNS name resolution.  This option must not appear in combi‐
             nation with any of the following options: ipv6.

                     Force DNS resolution of following host names on the command line
                     to the IPv4 namespace.
                     _EndOfDoc_; };

             flag = {
                 name      = ipv6;
                 flags-cant = ipv4, prefer;
                 value     = 6;
                 descrip   = "Use only IPv6 addresses for DNS name resolution";
                 doc = <<-  _EndOfDoc_
                     Force DNS resolution of following host names on the command line
                     to the IPv6 namespace.
                     _EndOfDoc_; };

             flag = {
                 name        = prefer;
                 flags-cant = ipv4, ipv6;
                 value = p;
                 arg-type    = keyword;
                 keyword    = 4, 6;
                 descrip     = 'Prefer IPv4 or IPv6 (as specified) addresses, but use either';
                 doc         = <<-  _EndOfDoc_ Prefer IPv4 or IPv6 (as specified) addresses, but use
             either.

     -d float, --destination=float
             Filename on the local system.

             The name to use to store the leapfile on the local system.  $LEAPFILE

     -e string, --expiration=string
             Refresh the leapfile this long before it expires.

             Specify how long before expiration the file is to be refreshed Units are required, e.g.
             "-e 60 days"  Note that larger values imply more frequent refreshes.  "$PREFETCH"

     -f string, --ntp-conf-file=string
             Location of the ntp.conf file.

             Specify location of ntp.conf (used to make sure leapfile directive is present and to
             default  leapfile) /etc/ntp.conf

     -F, --force-update
             Force update of the leapfile.

             Force update even if current file is OK and not close to expiring.

     --dont-wait
             Don't wait for keystroke between plots.


     -?, --help
             Display usage information and exit.

     -!, --more-help
             Pass the extended usage information through a pager.

     -v [{v|c|n --version [{v|c|n}]}]
             Output version of program and exit.  The default mode is `v', a simple version.  The
             `c' mode will print copyright information and `n' will print the full copyright notice.

USAGE
     Usage stuff

EXIT STATUS
     One of the following exit values will be returned:

     0  (EXIT_SUCCESS)
             Successful program execution.

     1  (EXIT_FAILURE)
             The operation failed or the command syntax was not valid.

     70  (EX_SOFTWARE)
             libopts had an internal operational error.  Please report it to auto‐
             gen-users AT lists.net.  Thank you.

AUTHORS
     Timothe Litt

NOTES
     This manual page was AutoGen-erated from the update-leap option definitions.

BSD                              June 23 2020                              BSD