767173cec2
Update 4.2.8p14 --> 4.2.8p15 Summary: Systems that use a CMAC algorithm in ntp.keys will not release a bit of memory on each packet that uses a CMAC keyid, eventually causing ntpd to run out of memory and fail. The CMAC cleanup from https://bugs.ntp.org/3447, part of ntp-4.2.8p11, introduced a bug whereby the CMAC data structure was no longer completely removed. MFC after: 3 days Security: NTP Bug 3661
170 lines
5.0 KiB
Plaintext
170 lines
5.0 KiB
Plaintext
.de1 NOP
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. it 1 an-trap
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. if \\n[.$] \,\\$*\/
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..
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.ie t \
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.ds B-Font [CB]
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.ds I-Font [CI]
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.ds R-Font [CR]
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.el \
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.ds B-Font B
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.ds I-Font I
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.TH update-leap 1update-leapman "23 Jun 2020" "ntp (4.2.8p15)" "User Commands"
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.\"
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.\" EDIT THIS FILE WITH CAUTION (in-mem file)
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.\"
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.\" It has been AutoGen-ed June 23, 2020 at 02:21:45 AM by AutoGen 5.18.5
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.\" From the definitions update-leap-opts.def
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.\" and the template file agman-cmd.tpl
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.SH NAME
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\f\*[B-Font]update-leap\fP
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\- leap-seconds file manager/updater
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.SH SYNOPSIS
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\f\*[B-Font]update-leap\fP
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.\" Mixture of short (flag) options and long options
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[\f\*[B-Font]\-flags\f[]]
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[\f\*[B-Font]\-flag\f[] [\f\*[I-Font]value\f[]]]
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[\f\*[B-Font]\-\-option-name\f[][[=| ]\f\*[I-Font]value\f[]]]
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.sp \n(Ppu
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.ne 2
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All arguments must be options.
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.sp \n(Ppu
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.ne 2
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.SH DESCRIPTION
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\f\*[B-Font]update-leap\fP
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will validate the file currently on the local system
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and if necessary, updates leap-second definition file.
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.sp \n(Ppu
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.ne 2
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Ordinarily, the file is found using the "leapfile" directive in
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\fCntp.conf\f[]\fR(5)\f[].
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However, an alternate location can be specified on the command line.
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.sp \n(Ppu
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.ne 2
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If the file does not exist, is not valid, has expired, or is expiring soon,
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a new copy will be downloaded. If the new copy validates, it is installed and
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NTP is (optionally) restarted.
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.sp \n(Ppu
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.ne 2
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If the current file is acceptable, no download or restart occurs.
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.sp \n(Ppu
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.ne 2
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-c can also be used to invoke another script to perform administrative
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functions, e.g. to copy the file to other local systems.
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.PP
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This can be run as a cron job. As the file is rarely updated, and leap
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seconds are announced at least one month in advance (usually longer), it
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need not be run more frequently than about once every three weeks.
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.PP
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For cron-friendly behavior, define CRONJOB=1 in the crontab.
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.PP
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This script depends on$REQUIREDCMDS
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.SH "OPTIONS"
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.TP
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.NOP \f\*[B-Font]\-s\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-source\-url\f[]=\f\*[I-Font]string\f[]
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The URL of the master copy of the leapseconds file.
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.sp
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Specify the URL of the master copy to download
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$LEAPSRC
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.TP
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.NOP \f\*[B-Font]\-4\f[], \f\*[B-Font]\-\-ipv4\f[]
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Use only IPv4 addresses for DNS name resolution.
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This option must not appear in combination with any of the following options:
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ipv6.
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.sp
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Force DNS resolution of following host names on the command line
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to the IPv4 namespace.
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_EndOfDoc_;
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};
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.sp
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flag = {
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name = ipv6;
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flags-cant = ipv4, prefer;
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value = 6;
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descrip = "Use only IPv6 addresses for DNS name resolution";
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doc = <<- _EndOfDoc_
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Force DNS resolution of following host names on the command line
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to the IPv6 namespace.
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_EndOfDoc_;
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};
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.sp
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flag = {
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name = prefer;
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flags-cant = ipv4, ipv6;
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value = p;
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arg-type = keyword;
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keyword = 4, 6;
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descrip = 'Prefer IPv4 or IPv6 (as specified) addresses, but use either';
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doc = <<- _EndOfDoc_
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Prefer IPv4 or IPv6 (as specified) addresses, but use either.
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.TP
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.NOP \f\*[B-Font]\-d\f[] \f\*[I-Font]float\f[], \f\*[B-Font]\-\-destination\f[]=\f\*[I-Font]float\f[]
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Filename on the local system.
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.sp
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The name to use to store the leapfile on the local system.
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$LEAPFILE
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.TP
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.NOP \f\*[B-Font]\-e\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-expiration\f[]=\f\*[I-Font]string\f[]
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Refresh the leapfile this long before it expires.
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.sp
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Specify how long before expiration the file is to be refreshed
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Units are required, e.g. "-e 60 days" Note that larger values
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imply more frequent refreshes.
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"$PREFETCH"
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.TP
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.NOP \f\*[B-Font]\-f\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-ntp\-conf\-file\f[]=\f\*[I-Font]string\f[]
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Location of the ntp.conf file.
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.sp
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Specify location of ntp.conf (used to make sure leapfile directive is
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present and to default leapfile)
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/etc/ntp.conf
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.TP
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.NOP \f\*[B-Font]\-F\f[], \f\*[B-Font]\-\-force\-update\f[]
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Force update of the leapfile.
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.sp
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Force update even if current file is OK and not close to expiring.
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.TP
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.NOP \f\*[B-Font]\-\-dont\-wait\f[]
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Don't wait for keystroke between plots.
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.sp
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.TP
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.NOP \f\*[B-Font]\-\&?\f[], \f\*[B-Font]\-\-help\f[]
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Display usage information and exit.
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.TP
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.NOP \f\*[B-Font]\-\&!\f[], \f\*[B-Font]\-\-more-help\f[]
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Pass the extended usage information through a pager.
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.TP
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.NOP \f\*[B-Font]\-v\f[] [{\f\*[I-Font]v|c|n\f[] \f\*[B-Font]\-\-version\f[] [{\f\*[I-Font]v|c|n\f[]}]}]
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Output version of program and exit. The default mode is `v', a simple
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version. The `c' mode will print copyright information and `n' will
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print the full copyright notice.
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.PP
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.SH USAGE
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Usage stuff
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.SH "EXIT STATUS"
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One of the following exit values will be returned:
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.TP
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.NOP 0 " (EXIT_SUCCESS)"
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Successful program execution.
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.TP
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.NOP 1 " (EXIT_FAILURE)"
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The operation failed or the command syntax was not valid.
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.TP
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.NOP 70 " (EX_SOFTWARE)"
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libopts had an internal operational error. Please report
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it to autogen-users@lists.sourceforge.net. Thank you.
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.PP
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.SH AUTHORS
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.NOP "Timothe Litt"
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.br
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.SH "NOTES"
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This manual page was \fIAutoGen\fP-erated from the \fBupdate-leap\fP
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option definitions.
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