1NTPLEAPFETCH(8)                     NTPsec                     NTPLEAPFETCH(8)
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NAME

6       ntpleapfetch - leap-seconds file manager/updater
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SYNOPSIS

9       ntpleapfetch
10           [-46] [-c command] [-e expiry] [-f config] [-F] [-h]
11               [-i interval] [-l] [L] [-p {4|6}] [-P logfacility] [-q]
12               [-r retries] [-s source-url] [-t path] [-v] [-z path]
13               [-Z] [leapfile] [-V | --version] [filename]
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DESCRIPTION

16       ntpleapfetch will validate the file currently on the local system and
17       if necessary, update leap second definition file.
18
19       Ordinarily, the file is found using the "leapfile" directive in
20       ntp.conf(5). However, an alternate location can be specified on the
21       command line.
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23       If the file does not exist, is not valid, has expired, or is expiring
24       soon, a new copy will be downloaded. If the new copy validates, it is
25       installed and NTP is (optionally) restarted.
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27       If the current file is acceptable, no download or restart occurs.
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29       -c can also be used to invoke another script to perform administrative
30       functions, e.g. to copy the file to other local systems.
31
32       This can be run as a cron job. As the file is rarely updated, and leap
33       seconds are announced at least one month in advance (usually longer),
34       it need not be run more frequently than about once every three weeks.
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36       For cron-friendly behavior, define CRONJOB=1 in the crontab.
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OPTIONS

39       -4
40           Use only IPv4 addresses for DNS name resolution. This option must
41           not appear in combination with -6.
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43       -6
44           Use only IPv6 addresses for DNS name resolution. This option must
45           not appear in combination with -4.
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47       -c
48           Command to restart ntpd after installing a new file. Without such a
49           command, ntpd checks the file daily.
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51       -e expiry
52           Refresh the leapfile this long before it expires.
53
54           Specify how long before expiration the file is to be refreshed.
55           Units are required, e.g. "-e 60 days". Note that larger values
56           imply more frequent refreshes.
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58       -f config
59           Location of the ntp.conf file.
60
61           Specify location of ntp.conf, which defaults to /etc/ntp.conf. It
62           is read to make sure the "leapfile" directive is present and to
63           determine the default path to the leapfile.
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65       -F
66           Force update even if current file is OK and not close to expiring.
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68       -i interval
69           Number of minutes between retries.
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71       -h
72           Display inline help.
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74       -l
75           Use syslog for output (Implied if CRONJOB is set).
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77       -L
78           Don’t use syslog for output
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80       -p {4|6}
81           Prefer IPv4 or IPv6 (as specified) addresses, but use either.
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83       -P logfacility
84           Specify the syslog facility for logging.
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86       -q
87           Only report errors to stdout.
88
89       -r retries
90           Number of retries.
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92       -s source-url
93           The URL of the master copy of the leapseconds file.
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95       -t path
96           Name of temporary file used in validation.
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98       -v
99           Verbose output.
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101       -z path
102           Specify path for utilities.
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104       -Z
105           Use system path only.
106
107       -V, --version
108           Print the version string and exit.
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110       leapfile
111           An alternate location to download the leapseconds file to.
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EXIT STATUS

114       One of the following exit values will be returned:
115
116       0 (EXIT_SUCCESS)
117           Successful program execution.
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119       1 (EXIT_FAILURE)
120           The operation failed or the command syntax was not valid.
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122       2
123           Internal error - restart command failed.
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AUTHORS

126       Timothe Litt
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130NTPsec                            2021-07-22                   NTPLEAPFETCH(8)
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