127
127
</refsynopsisdiv>
129
129
<refsect1 id="description">
130
130
<title>DESCRIPTION</title>
132
<command>&COMMANDNAME;</command> is a program which is meant to
133
be specified as <quote>keyscript</quote> in <citerefentry>
134
<refentrytitle>crypttab</refentrytitle>
135
<manvolnum>5</manvolnum></citerefentry> for the root disk. The
136
aim of this program is therefore to output a password, which
137
then <citerefentry><refentrytitle>cryptsetup</refentrytitle>
138
<manvolnum>8</manvolnum></citerefentry> will use to try and
139
unlock the root disk.
142
This program is not meant to be invoked directly, but can be in
143
order to test it. Note that any password obtained will simply
144
be output on standard output.
148
<refsect1 id="purpose">
149
<title>PURPOSE</title>
151
The purpose of this is to enable <emphasis>remote and unattended
152
rebooting</emphasis> of client host computer with an
153
<emphasis>encrypted root file system</emphasis>. See <xref
154
linkend="overview"/> for details.
132
<command>&COMMANDNAME;</command> is a plugin runner that waits
133
for any of its plugins to return sucessfull with a password, and
134
passes it to cryptsetup as stdout message. This command is not
135
meant to be invoked directly, but is instead meant to be run by
136
cryptsetup by being specified in /etc/crypttab as a keyscript
137
and subsequlently started in the initrd environment. See
138
<citerefentry><refentrytitle>crypttab</refentrytitle>
139
<manvolnum>5</manvolnum></citerefentry> for more information on
144
plugins is looked for in the plugins directory which by default will be
145
/conf/conf.d/mandos/plugins.d if not changed by option --plugin-dir.
159
149
<title>OPTIONS</title>
162
<term><option>--global-env
163
<replaceable>VAR</replaceable><literal>=</literal><replaceable
164
>value</replaceable></option></term>
166
<replaceable>VAR</replaceable><literal>=</literal><replaceable
167
>value</replaceable></option></term>
170
This option will add an environment variable setting to
171
all plugins. This will override any inherited environment
178
<term><option>--env-for
179
<replaceable>PLUGIN</replaceable><literal>:</literal
180
><replaceable>ENV</replaceable><literal>=</literal
181
><replaceable>value</replaceable></option></term>
183
<replaceable>PLUGIN</replaceable><literal>:</literal
184
><replaceable>ENV</replaceable><literal>=</literal
185
><replaceable>value</replaceable></option></term>
188
This option will add an environment variable setting to
189
the <replaceable>PLUGIN</replaceable> plugin. This will
190
override any inherited environment variables or
191
environment variables specified using
192
<option>--global-env</option>.
198
152
<term><option>--global-options
199
153
<replaceable>OPTIONS</replaceable></option></term>
201
155
<replaceable>OPTIONS</replaceable></option></term>
204
Pass some options to <emphasis>all</emphasis> plugins.
205
<replaceable>OPTIONS</replaceable> is a comma separated
206
list of options. This is not a very useful option, except
207
for specifying the <quote><option>--debug</option></quote>
158
Global options given to all plugins as additional start
159
arguments. Options are specified with a -o flag followed
160
by a comma separated string of options.
214
166
<term><option>--options-for
215
167
<replaceable>PLUGIN</replaceable><literal>:</literal
219
171
><replaceable>OPTION</replaceable></option></term>
222
Pass some options to a specific plugin. <replaceable
223
>PLUGIN</replaceable> is the name (file basename) of a
224
plugin, and <replaceable>OPTIONS</replaceable> is a comma
225
separated list of options.
228
Note that since options are not split on whitespace, the
229
way to pass, to the plugin
230
<quote><filename>foo</filename></quote>, the option
231
<option>--bar</option> with the option argument
232
<quote>baz</quote> is either
233
<userinput>--options-for=foo:--bar=baz</userinput> or
234
<userinput>--options-for=foo:--bar,baz</userinput>, but
235
<emphasis>not</emphasis>
236
<userinput>--options-for="foo:--bar baz"</userinput>.
174
Plugin specific options given to the plugin as additional
175
start arguments. Options are specified with a -o flag
176
followed by a comma separated string of options.
334
253
<term><option>-V</option></term>
337
Prints the program version.
256
Prints the program version
344
<refsect1 id="overview">
345
<title>OVERVIEW</title>
346
<xi:include href="overview.xml"/>
348
This program will run on the client side in the initial
349
<acronym>RAM</acronym> disk environment, and is responsible for
350
getting a password. It does this by running plugins, one of
351
which will normally be the actual client program communicating
355
<refsect1 id="plugins">
356
<title>PLUGINS</title>
358
This program will get a password by running a number of
359
<firstterm>plugins</firstterm>, which are simply executable
360
programs in a directory in the initial <acronym>RAM</acronym>
361
disk environment. The default directory is
362
<filename>/lib/mandos/plugins.d</filename>, but this can be
363
changed with the <option>--plugin-dir</option> option. The
364
plugins are started in parallel, and the first plugin to output
365
a password <emphasis>and</emphasis> exit with a successful exit
366
code will make this plugin-runner output the password from that
367
plugin, stop any other plugins, and exit.
371
<refsect1 id="fallback">
372
<title>FALLBACK</title>
374
If no plugins succeed, this program will, as a fallback, ask for
375
a password on the console using <citerefentry><refentrytitle
376
>getpass</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
377
and output it. This is not meant to be the normal mode of
378
operation, as there is a separate plugin for getting a password
383
263
<refsect1 id="exit_status">
384
264
<title>EXIT STATUS</title>
386
Exit status of this program is zero if no errors were
387
encountered, and otherwise not. The fallback (see <xref
388
linkend="fallback"/>) may or may not have succeeded in either
393
<refsect1 id="environment">
394
<title>ENVIRONMENT</title>
400
269
<refsect1 id="file">
401
270
<title>FILES</title>
406
>/conf/conf.d/mandos/plugin-runner.conf</filename></term>
409
Since this program will be run as a keyscript, there is
410
little to no opportunity to pass command line arguments
411
to it. Therefore, it will <emphasis>also</emphasis>
412
read this file and use its contents as
413
whitespace-separated command line options. Also,
414
everything from a <quote>#</quote> character to the end
415
of a line is ignored.
418
This file will be processed <emphasis>before</emphasis>
419
the normal command line options, so the latter can
420
override the former, if need be.
275
<refsect1 id="notes">
428
281
<refsect1 id="bugs">
429
282
<title>BUGS</title>
431
There is no <option>--enable</option> option to enable disabled
436
287
<refsect1 id="examples">
437
288
<title>EXAMPLE</title>
442
293
<refsect1 id="security">
443
294
<title>SECURITY</title>
448
299
<refsect1 id="see_also">
449
300
<title>SEE ALSO</title>