Provided by: ntp_4.2.8p12+dfsg-3ubuntu1_amd64 bug

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
     alternate 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
     updated, 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, define 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
                 combination 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
                   autogen-users@lists.sourceforge.net.  Thank you.

AUTHORS

     Timothe Litt

NOTES

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