Provided by: ntp_4.2.8p4+dfsg-3ubuntu5.10_amd64 
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.