1conf(3) User Contributed Perl Documentation conf(3)
2
6 Net::DNS::SEC::Tools::conf - DNSSEC-Tools configuration routines.
7
9 use Net::DNS::SEC::Tools::conf;
10 %dtconf = parseconfig();
12 %dtconf = parseconfig("localzone.keyrec");
14 cmdcheck(\%options_hashref);
16 $conferrs = dt_confcheck();
18 $prefixdir = getprefixdir();
20 $confdir = getconfdir();
22 $conffile = getconffile();
24 setconffile("dt-local.conf");
26 $statedir = getlocalstatedir();
28 $statedir = makelocalstatedir();
30 $statesub = makelocalstatedir("logs/zones");
31 $packed = runpacked();
34 erraction(ERR_MSG);
36 err("unable to open keyrec file",1);
37
39 The routines in this module perform configuration operations. Some
40 routines access the DNSSEC-Tools configuration file, while others
41 validate the execution environment.
42 The DNSSEC tools have a configuration file for commonly used values.
44 These values are the defaults for a variety of things, such as
45 encryption algorithm and encryption key length. The
46 Net::DNS::SEC::Tools::conf module provides methods for accessing the
47 configuration data in this file.
48 dnssec-tools.conf is the filename for the DNSSEC tools configuration
50 file. The full path depends on how DNSSEC-Tools was configured; see
51 the DIRECTORIES section for the complete path. The paths required by
52 conf.pm are set at DNSSEC-Tools configuration time.
53 The DNSSEC tools configuration file consists of a set of configuration
55 value entries, with only one entry per line. Each entry has the
56 "keyword value" format. During parsing, the line is broken into
57 tokens, with tokens being separated by spaces and tabs. The first
58 token in a line is taken to be the keyword. All other tokens in that
59 line are concatenated into a single string, with a space separating
60 each token. The untokenized string is added to a hash table, with the
61 keyword as the value's key.
62 Comments may be included by prefacing them with the '#' or ';' comment
64 characters. These comments can encompass an entire line or may follow
65 a configuration entry. If a comment shares a line with an entry, value
66 tokenization stops just prior to the comment character.
67 An example configuration file follows:
69 # Sample configuration entries.
71 algorithm rsasha1 # Encryption algorithm.
73 ksk_length 2048 ; KSK key length.
74 Another aspect of DNSSEC-Tools configuration is the error action used
76 by the DNSSEC-Tools Perl modules. The action dictates whether an error
77 condition will only give an error return, print an error message to
78 STDERR, or print an error message and exit. The erraction() and err()
79 interfaces are used for these operations.
80
82 dt_confcheck(errflag)
83 This routine performs a number of configuration checks to ensure
84 the environment is sufficient to support the DNSSEC-Tools
85 configuration. If errflag is 0, then the checks are performed
86 quietly; otherwise, error messages will be printed.
87 The checks are:
89 * The dnssec-tools sysconf directory exists.
91 * The dnssec-tools sysconf directory is a directory.
92 * The dnssec-tools directory exists.
93 * The dnssec-tools directory is a directory.
94 * The dnssec-tools config file exists.
95 * The dnssec-tools config file is a regular file.
96 * The dnssec-tools config file isn't empty.
97 * The local state directory name isn't longer than 75
98 characters (to allow for the rollmgr command socket.)
99 * The local state directory is a directory.
100 * The local state directory can be created if necessary.
101 * The local state directory's dnssec-tools subdirectory
102 can be created if necessary, or is writable if it
103 already exists.
104 * The local state directory's run subdirectory
105 can be created if necessary, or is writable if it
106 already exists.
107 Return Values:
109 0 no errors were found
111 >0 some number of configuration checks failed
112 parseconfig()
114 This routine reads and parses the system's DNSSEC tools
115 configuration file. The parsed contents are put into a hash table,
116 which is returned to the caller.
117 parseconfig(conffile)
119 This routine reads and parses a caller-specified DNSSEC tools
120 configuration file. The parsed contents are put into a hash table,
121 which is returned to the caller. The routine quietly returns if
122 the configuration file does not exist.
123 cmdcheck(\%options_hashref)
125 This routine ensures that the needed commands are available and
126 executable. If any of the commands either don't exist or aren't
127 executable, then an error message will be given and the process
128 will exit. If all is well, everything will proceed quietly
129 onwards.
130 The commands keys currently checked are zonecheck, keygen, and
132 zonesign. The pathnames for these commands are found in the given
133 options hash referenced by %options_hashref. If the hash doesn't
134 contain an entry for one of those commands, it is not checked.
135 If this routine is called from a PAR-packed script, then it will
137 look in the package directory for the commands. It will also set
138 their file modes to 0755, as PAR appears to ignore file modes when
139 packaging programs.
140 getconfdir()
142 This routine returns the name of the DNSSEC-Tools configuration
143 directory.
144 getconffile()
146 This routine returns the name of the DNSSEC-Tools configuration
147 file.
148 setconffile()
150 This routine sets the name of the DNSSEC-Tools configuration file.
151 Return values:
153 1 returned on success
154 0 returned if the specified configuration file does not
155 exist or is not a regular file
156 getprefixdir()
158 This routine returns the name of the DNSSEC-Tools prefix directory.
159 getlocalstatedir()
161 This routine returns the name of the local state directory.
162 runpacked()
164 This routine returns a boolean indicating if the executing command
165 is running from a PAR-packed script.
166 makelocalstatedir(subdir)
168 This routine makes the local state directory and returns its name.
169 The directory is created only if it doesn't exist already.
170 If the optional subdir subdirectory is specified, then that
172 directory is created within the local state directory. In this
173 case, the path of subdir is returned. subdir may consist of
174 several intermediate directories, as well as the terminal
175 directory. For example, makelocalstatedir("logs/zones/errors")
176 will create the logs/zones/errors hierarchy within the local state
177 directory.
178 makelocalstatedir(subdir) uses the File::Path module, which is
180 available on all modern Perl versions.
181 An empty string is returned if there are any errors. The following
183 errors may be encountered:
184 * I<File::Path> could not be loaded
186 * Unable to create the local state directory
187 * Unable to create a component of I<subdir>
188 * Full path (local state directory and I<subdir>) already
189 exists and is not a directory
190 boolconvert(config-value)
192 This routine converts configuration values into appropriate boolean
193 values. The following text conversions are made:
194 1 - 'true', 't', 'yes', 'y'
196 0 - 'false', 'f', 'no', 'n'
197 All other text values are converted to 0.
199 Positive values are converted to 1. Negative values are converted
201 to 0.
202 erraction(error_action)
204 This interface sets the error action for DNSSEC-Tools Perl modules.
205 The valid actions are:
206 ERR_SILENT Do not print an error message, do not exit.
208 ERR_MSG Print an error message, do not exit.
209 ERR_EXIT Print an error message, exit.
210 ERR_SILENT is the default action.
212 The previously set error action is returned.
214 err("error message",exit_code)
216 The err() interface is used by the DNSSEC-Tools Perl modules to
217 report an error and exit, depending on the error action.
218 The first argument is an error message to print -- if the error
220 action allows error messages to be printed.
221 The second argument is an exit code -- if the error action requires
223 that the process exit.
224
226 The default directories for this installation are:
227 prefix : /usr
229 sysconf : /etc
230 localstatedir : /var
231 DNSSEC-Tools configuration file: /etc/dnssec-tools
233 These can be overridden using the following environmental variables:
235 prefix : DT_PREFIX
237 sysconf : DT_SYSCONFDIR
238 localstatedir : DT_STATEDIR
239
241 Copyright 2004-2014 SPARTA, Inc. All rights reserved. See the COPYING
242 file included with the DNSSEC-Tools package for details.
243
245 Wayne Morrison, tewok@tislabs.com
246
248 dnssec-tools.conf(5)
249perl v5.28.0 2018-10-04 conf(3)