Ubuntu Manpage: Net::DNS::SEC::Tools::tooloptions

NAME

       Net::DNS::SEC::Tools::tooloptions - DNSSEC-Tools option routines.

SYNOPSIS

         use Net::DNS::SEC::Tools::tooloptions;

         @specopts = ("propagate+", "waittime=i");

         %opts = opts_cmdline($restoreargv,@calleropts);

         $optsref = opts_cmdopts(@specopts);
         %options = %$optsref;

         $zoneref = opts_zonekr($keyrec_file,$keyrec_name,@specopts);
         %zone_kr = %$zoneref;

         opts_setcsopts(@specopts);

         opts_createkrf();

         opts_suspend();

         opts_restore();

         opts_drop();

         opts_reset();

         opts_gui();

         opts_nogui();

         $oldaction = opts_onerr(1);
         opts_onerr(0);

DESCRIPTION

DNSSEC-Tools supports a set of options common to all the tools in the suite. These options may be set
from DNSSEC-Tools defaults, values set in the dnssec-tools.conf configuration file, in a keyrec file,
from command-specific options, from command-line options, or from any combination of the five. In order
to enforce a common sequence of option interpretation, all DNSSEC-Tools should use the tooloptions.pm
routines to initialize their options.

tooloptions.pm routines combine data from the aforementioned option sources into a hash table. The hash
table is returned to the caller, which will then use the options as needed.

The command-line options are saved between calls, so a command may call tooloptions.pm routines multiple
times and still have the command-line options included in the final hash table. This is useful for
examining multiple keyrecs in a single command. Inclusion of command-line options may be suspended and
restored using the opts_suspend() and opts_restore() calls. Options may be discarded entirely by calling
opts_drop(); once dropped, command-line options may never be restored. Suspension, restoration, and
dropping of command-line options are only effective after the initial tooloptions.pm call.

The options sources are combined in this order:

1. DNSSEC-Tools Defaults
The DNSSEC-Tools defaults, as defined in conf.pm are put into a hash table, with the option names as
the hash key.

2. DNSSEC-Tools Configuration File
The system-wide DNSSEC-Tools configuration file is read and these option values are added to the
option collection. Again, the option names are used as the hash key.

3. keyrec File
If a keyrec file was specified, then the keyrec named by keyrec_name will be retrieved. The keyrec's
fields are added to the hash table. Any field whose keyword matches an existing hash key will
override any existing values.

4. Command-Specific Options
Options specific to the invoking commands may be specified in @specopts. This array is parsed by
Getoptions() from the Getopt::Long Perl module. These options are folded into the hash table;
possibly overriding existing hash values. The options given in @specopts must be in the format
required by Getoptions().

5. Command-Line Options
The command-line options are parsed using Getoptions() from the Getopt::Long Perl module. These
options are folded into the hash table; again, possibly overriding existing hash values. The options
given in @specopts must be in the format required by Getoptions().

A reference to the hash table created in these steps is returned to the caller.

EXAMPLE

       dnssec-tools.conf has these entries:

           ksklength      2048
           zsklength      1024

       example.keyrec has this entry:

           key         "Kexample.com.+005+12345"
                   zsklength        "2048"

       zonesigner is executed with this command line:

           zonesigner -zsklength 4096 -wait 3600 ...  example.com

       opts_zonekr("example.keyrec","Kexample.com.+005+12345",("wait=i")) will read each option source in turn,
       ending up with:
           ksklength          1024
           zsklength          4096
           wait                600

TOOLOPTIONS INTERFACES

opts_cmdline($restoreargv,@calleropts)
This routine parses a command line looking for the arguments in the standard set of options and an
optional set of options specified by the caller. If the first argument is true, the program-wide
@ARGV is restored after parsing. If the caller provides other arguments, they're added as additional
options. The parsed options are returned to the caller in a hash.

opts_cmdopts(@csopts)
The opts_cmdopts() call builds an option hash from the system configuration file, a keyrec, and a set
of command-specific options. A reference to this option hash is returned to the caller.

If $keyrec_file is given as an empty string, then no keyrec file will be consulted. In this case, it
is assumed that $keyrec_name will be left out altogether.

If a non-existent $keyrec_file is given and opts_createkrf() has been called, then the named keyrec
file will be created. opts_createkrf() must be called for each keyrec file that must be created, as
the tooloptions keyrec-creation state is reset after tooloptions() has completed.

opts_zonekr($keyrec_file,$keyrec_name,@csopts)
This routine returns a reference to options gathered from the basic option sources and from the zone
keyrec named by $keyrec_name, which is found in $keyrec_file. The keyrec fields from the zone's KSK
and ZSK are folded in as well, but the key's keyrec_ fields are excluded. This call ensures that the
named keyrec is a zone keyrec; if it isn't, undef is returned.

The keyrec file is read with keyrec_read(). To ensure it is properly read, keyrec_close() is called
first.

The $keyrec_file argument specifies a keyrec file that will be consulted. The keyrec named by the
$keyrec_name argument will be loaded. If a keyrec file is found and opts_createkrf() has been
previously called, then the keyrec file will be created if it doesn't exist.

If $keyrec_file is given as "", then the command-line options are searched for a -krfile option. If
$keyrec_name is given as "", then the name is taken from $ARGV[0].

The @specopts array contains command-specific arguments; the arguments must be in the format
prescribed by the Getopt::Long Perl module.

If the command line contains the -dtconfig option, then opts_zonekr() sets that option to be the
configuration file. It then parses that file and uses it as the source for configuration file data.

opts_setcsopts(@csopts)
This routine saves a copy of the command-specific options given in @csopts. This collection of
options is added to the @csopts array that may be passed to tooloptions.pm routines.

opts_createkrf()
Force creation of an empty keyrec file if the specified file does not exist. This may happen on
calls to opts_zonekr().

opts_suspend()
Suspend inclusion of the command-line options in building the final hash table of responses.

opts_restore()
Restore inclusion of the command-line options in building the final hash table of responses.

opts_drop()
Discard the command-line options. They will no longer be available for inclusion in building the
final hash table of responses for this execution of the command.

opts_reset()
Reset an internal flag so that the command-line arguments may be re-examined. This is usually only
useful if the arguments have been modified by the calling program itself.

opts_gui()
Set an internal flag so that command arguments may be specified with a GUI. GUI usage requires that
Getopt::GUI::Long is available. If it isn't, then Getopt::Long will be used.

opts_nogui()
Set an internal flag so that the GUI will not be used for specifying command arguments.

opts_onerr(exitflag)
Set an internal flag indicating what should happen if an invalid option is specified on the command
line. If exitflag is non-zero, then the process will exit on an invalid option; if it is zero, then
the process will not exit. The default action is to report an error without exiting.

The old exit action is returned.

COPYRIGHT

       Copyright 2005-2014 SPARTA, Inc.  All rights reserved.  See the COPYING file included with the DNSSEC-
       Tools package for details.

AUTHOR

       Wayne Morrison, tewok@tislabs.com