1330567Sgordon.Dd February 27 2018
2281348Scy.Dt UPDATE_LEAP 1update-leapmdoc User Commands
3281348Scy.Os
4281348Scy.\"  EDIT THIS FILE WITH CAUTION  (update-leap-opts.mdoc)
5281348Scy.\"
6330567Sgordon.\"  It has been AutoGen-ed  February 27, 2018 at 04:55:53 PM by AutoGen 5.18.5
7281348Scy.\"  From the definitions    update-leap-opts.def
8281348Scy.\"  and the template file   agmdoc-cmd.tpl
9281348Scy.Sh NAME
10281348Scy.Nm update-leap
11281348Scy.Nd leap-seconds file manager/updater
12281348Scy.Sh SYNOPSIS
13281348Scy.Nm
14281348Scy.\" Mixture of short (flag) options and long options
15281348Scy.Op Fl flags
16281348Scy.Op Fl flag Op Ar value
17281348Scy.Op Fl \-option\-name Ns Oo Oo Ns "=| " Oc Ns Ar value Oc
18281348Scy.Pp
19281348ScyAll arguments must be options.
20281348Scy.Pp
21281348Scy.Sh DESCRIPTION
22281348Scy.Nm
23281348Scywill validate the file currently on the local system
24281348Scyand if necessary, updates leap\-second definition file.
25281348Scy.Pp
26281348ScyOrdinarily, the file is found using the "leapfile" directive in
27281348Scy.Xr ntp.conf 5 .
28281348ScyHowever, an alternate location can be specified on the command line.
29281348Scy.Pp
30281348ScyIf the file does not exist, is not valid, has expired, or is expiring soon,
31281348Scya new copy will be downloaded.  If the new copy validates, it is installed and
32281348ScyNTP is (optionally) restarted.
33281348Scy.Pp
34281348ScyIf the current file is acceptable, no download or restart occurs.
35281348Scy.Pp
36281348Scy-c can also be used to invoke another script to perform administrative
37281348Scyfunctions, e.g. to copy the file to other local systems.
38281348Scy.PP
39281348ScyThis can be run as a cron job.  As the file is rarely updated, and leap
40281348Scyseconds are announced at least one month in advance (usually longer), it
41281348Scyneed not be run more frequently than about once every three weeks.
42281348Scy.PP
43281348ScyFor cron\-friendly behavior, define CRONJOB=1 in the crontab.
44281348Scy.PP
45281348ScyThis script depends on$REQUIREDCMDS
46281348Scy.Sh "OPTIONS"
47281348Scy.Bl -tag
48281348Scy.It  Fl s Ar string , Fl \-source\-url Ns = Ns Ar string 
49281348ScyThe URL of the master copy of the leapseconds file.
50281348Scy.sp
51281348ScySpecify the URL of the master copy to download
52281348Scy$LEAPSRC
53281348Scy.It  Fl 4 , Fl \-ipv4 
54281348ScyUse only IPv4 addresses for DNS name resolution.
55281348ScyThis option must not appear in combination with any of the following options:
56281348Scyipv6.
57281348Scy.sp
58281348Scy        Force DNS resolution of following host names on the command line
59281348Scy        to the IPv4 namespace.
60281348Scy        _EndOfDoc_;
61281348Scy};
62281348Scy.sp
63281348Scyflag = {
64281348Scy    name      = ipv6;
65281348Scy    flags\-cant = ipv4, prefer;
66281348Scy    value     = 6;
67281348Scy    descrip   = "Use only IPv6 addresses for DNS name resolution";
68281348Scy    doc = <<\-  _EndOfDoc_
69281348Scy        Force DNS resolution of following host names on the command line
70281348Scy        to the IPv6 namespace.
71281348Scy        _EndOfDoc_;
72281348Scy};
73281348Scy.sp
74281348Scyflag = {
75281348Scy    name        = prefer;
76281348Scy    flags\-cant	= ipv4, ipv6;
77281348Scy    value	= p;
78281348Scy    arg\-type    = keyword;
79281348Scy    keyword	= 4, 6;
80281348Scy    descrip     = 'Prefer IPv4 or IPv6 (as specified) addresses, but use either';
81281348Scy    doc         = <<\-  _EndOfDoc_
82281348ScyPrefer IPv4 or IPv6 (as specified) addresses, but use either.
83281348Scy.It  Fl d Ar float , Fl \-destination Ns = Ns Ar float 
84281348ScyFilename on the local system.
85281348Scy.sp
86281348ScyThe name to use to store the leapfile on the local system.
87281348Scy$LEAPFILE
88281348Scy.It  Fl e Ar string , Fl \-expiration Ns = Ns Ar string 
89281348ScyRefresh the leapfile this long before it expires.
90281348Scy.sp
91281348ScySpecify how long before expiration the file is to be refreshed
92281348ScyUnits are required, e.g. "\-e 60 days"  Note that larger values
93281348Scyimply more frequent refreshes.
94281348Scy"$PREFETCH"
95281348Scy.It  Fl f Ar string , Fl \-ntp\-conf\-file Ns = Ns Ar string 
96281348ScyLocation of the ntp.conf file.
97281348Scy.sp
98281348ScySpecify location of ntp.conf (used to make sure leapfile directive is
99281348Scypresent and to default  leapfile)
100281348Scy/etc/ntp.conf
101281348Scy.It  Fl F , Fl \-force\-update 
102281348ScyForce update of the leapfile.
103281348Scy.sp
104281348ScyForce update even if current file is OK and not close to expiring.
105281348Scy.It  Fl \-dont\-wait 
106281348ScyDon't wait for keystroke between plots.
107281348Scy.sp
108281348Scy.It Fl \&? , Fl \-help
109281348ScyDisplay usage information and exit.
110281348Scy.It Fl \&! , Fl \-more\-help
111281348ScyPass the extended usage information through a pager.
112281348Scy.It Fl v Op Brq Ar v|c|n  Fl \-version Op Brq Ar v|c|n
113281348ScyOutput version of program and exit.  The default mode is `v', a simple
114281348Scyversion.  The `c' mode will print copyright information and `n' will
115281348Scyprint the full copyright notice.
116281348Scy.El
117281348Scy.Sh USAGE
118281348ScyUsage stuff
119281348Scy.Sh "EXIT STATUS"
120281348ScyOne of the following exit values will be returned:
121281348Scy.Bl -tag
122281348Scy.It 0 " (EXIT_SUCCESS)"
123281348ScySuccessful program execution.
124281348Scy.It 1 " (EXIT_FAILURE)"
125281348ScyThe operation failed or the command syntax was not valid.
126281348Scy.It 70 " (EX_SOFTWARE)"
127281348Scylibopts had an internal operational error.  Please report
128281348Scyit to autogen\-users@lists.sourceforge.net.  Thank you.
129281348Scy.El
130281348Scy.Sh AUTHORS
131281348Scy.An "Timothe Litt"
132281348Scy.Sh "NOTES"
133281348ScyThis manual page was \fIAutoGen\fP\-erated from the \fBupdate\-leap\fP
134281348Scyoption definitions.
135