update-leap(1update-leapman) User Commands update-leap(1update-leapman)
NAMEupdate-leap - leap-seconds file manager/updater
SYNOPSISupdate-leap [-flags] [-flag [value]] [--option-name[[=| ]value]]
All arguments must be options.
DESCRIPTIONupdate-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 com‐
mand line
to the IPv4 namespace.
_EndOfDoc_; };
flag = {
name = ipv6;
flags-cant = ipv4, prefer;
value = 6;
descrip = "Use only IPv6 addresses for DNS name resolu‐
tion";
doc = <<- _EndOfDoc_
Force DNS resolution of following host names on the com‐
mand 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 speci‐
fied) 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 direc‐
tive 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 expir‐
ing.
--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 defini‐
tions.
ntp (4.2.8p6) 20 Jan 2016 update-leap(1update-leapman)
