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27 .\" The section on comments was taken from named.conf.5, which has the
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49 .Nd configuration file for
55 configuration consists of two general features, statements
57 All statements end with a semicolon.
58 Many statements can contain substatements, which are also
59 terminated with a semicolon.
61 The following statements are supported:
62 .Bl -tag -width ".Ic options"
64 Specifies various matching criteria and actions to perform when
65 a newly attached device matches said criteria.
67 Specifies various matching criteria and actions to perform when
68 a newly detached device matches said criteria.
70 Specifies various matching criteria and actions to perform when
71 no device driver currently loaded in the kernel claims a (new)
74 Specifies various matching criteria and actions to perform when the kernel
75 sends an event notification to userland.
77 Specifies various options and parameters for the operation of
81 Statements may occur in any order in the configuration file, and may be
82 repeated as often as required.
83 Further details on the syntax and meaning of each statement and their
84 substatements are explained below.
86 Each statement, except
88 has a priority (an arbitrary number) associated with it, where
90 is defined as the lowest priority.
91 If two statements match the same event, only the action of the statement with
92 highest priority will be executed.
93 In this way generic statements can be overridden for devices or
94 notifications that require special attention.
96 The general syntax of a statement is:
98 .Bd -literal -offset indent
100 substatement "value";
102 substatement "value";
106 The following sub-statements are supported within the
109 .Bl -tag -width ".Ic directory"
110 .It Ic directory Qq Ar /some/path ;
111 Adds the given directory to the list of directories from which
117 statements can be used.
118 .It Ic pid-file Qq Pa /var/run/devd.pid ;
120 .It Ic set Ar regexp-name Qq Ar (some|regexp) ;
121 Creates a regular expression and assigns it to the variable
123 The variable is available throughout the rest of
124 the configuration file.
125 All regular expressions have an implicit
130 The following sub-statements are supported within the
135 .Bl -tag -width ".Ic directory"
136 .It Ic action Qq Ar command ;
137 Command to execute upon a successful match.
139 .Dq Li "/etc/pccard_ether $device-name start" .
140 .It Ic class Qq Ar string ;
141 This is shorthand for
142 .Dq Ic match Qo Li class Qc Qq Ar string .
143 .It Ic device-name Qq string ;
144 This is shorthand for
145 .Dq Ic match Qo Li device-name Qc Qq Ar string .
146 This matches a device named
148 which is allowed to be a regular expression or a variable previously created
149 containing a regular expression.
153 is available for later use with the
156 .It Ic match Qo Ar variable Qc Qq Ar value ;
157 Matches the content of
163 may be a regular expression.
170 statement takes care of all device matching.
171 For a partial list of variables, see below.
172 .It Ic media-type Qq Ar string ;
175 will match devices that have the given media type.
176 Valid media types are:
184 .It Ic subdevice Qq Ar string ;
185 This is shorthand for
186 .Dq Ic match Qo Li subdevice Qc Qq Ar string .
189 The following sub-statements are supported within the
192 .Bl -tag -width ".Ic directory"
193 .It Ic action Qq Ar command ;
195 .It Ic match Qo Ar variable Qc Qq Ar value ;
196 Matches the content of
202 may be a regular expression.
203 For a partial list of variables, see below.
206 The following sub-statements are supported within the
211 variable is available inside this statement and contains, a value, depending
212 on which system and subsystem that delivered the event.
213 .Bl -tag -width ".Ic directory"
214 .It Ic action Qq Ar command ;
215 Command to execute upon a successful match.
217 .Dq Li "/etc/rc.d/power_profile $notify" .
218 .It Ic match Qo Ar system | subsystem | type | notify Qc Qq Ar value ;
221 statements can exist within a
225 can be either a fixed string or a regular expression.
226 Below is a list of available systems, subsystems, and types.
227 .It Ic media-type Qq Ar string ;
230 .Ss Variables that can be used with the match statement
231 A partial list of variables and their possible values that can be used together
236 .Bl -tag -width ".Li manufacturer" -compact
240 Device name of parent bus.
242 Device node path if one is created by the
254 Name of attached/detached device.
258 Manufacturer ID (pccard).
260 Match the value of the
274 Matches a subsystem of a system, see below.
276 Matches a system type, see below.
278 Type of notification, see below.
283 A partial list of systems, subsystems, and types used within the
287 .Bl -tag -width ".Li coretemp" -compact
290 Events related to the ACPI subsystem.
291 .Bl -tag -width ".Sy Subsystem" -compact
294 AC line state ($notify=0x00 is offline, 0x01 is online).
296 Button state ($notify=0x00 is power, 0x01 is sleep).
300 Lid state ($notify=0x00 is closed, 0x01 is open).
306 Events related to the network subsystem.
307 .Bl -tag -width ".Sy Subsystem" -compact
312 is the actual name of the network interface on which the event
314 .Bl -tag -width ".Li LINK_DOWN" -compact
317 Carrier status changed to UP.
319 Carrier status changed to DOWN.
321 The network interface is attached to the system.
323 The network interface is detached from the system.
327 Events related to the
330 .Bl -tag -width ".Sy Subsystem" -compact
333 .Bl -tag -width ".Li DESTROY" -compact
346 Events related to the
349 .Bl -tag -width ".Sy Subsystem" -compact
352 Notification that the CPU core has reached critical temperature.
353 .Bl -tag -width ".Ar temperature" -compact
356 String containing the temperature of the core that has become too hot.
360 Events related to the kernel.
361 .Bl -tag -width ".Sy Subsystem" -compact
364 Information about the state of the system.
365 .Bl -tag -width ".li resume" -compact
368 Notification that the system has woken from the suspended state.
373 A link state change to UP on the interface
375 would result in the following notify event:
376 .Bd -literal -offset indent
377 system=IFNET, subsystem=fxp0, type=LINK_UP
380 An AC line state change to
382 would result in the following event:
383 .Bd -literal -offset indent
384 system=ACPI, subsystem=ACAD, notify=0x00
387 Comments may appear anywhere that whitespace may appear in a
389 To appeal to programmers of all kinds, they can
390 be written in C, C++, or shell/Perl constructs.
392 C-style comments start with the two characters
394 (slash, star) and end with
397 Because they are completely delimited with these characters,
398 they can be used to comment only a portion of a line or to span
401 C-style comments cannot be nested.
402 For example, the following is
403 not valid because the entire comment ends with the first
405 .Bd -literal -offset indent
406 /* This is the start of a comment.
407 This is still part of the comment.
408 /* This is an incorrect attempt at nesting a comment. */
409 This is no longer in any comment. */
412 C++-style comments start with the two characters
414 (slash, slash) and continue to the end of the physical line.
415 They cannot be continued across multiple physical lines; to have
416 one logical comment span multiple lines, each line must use the
420 .Bd -literal -offset indent
421 // This is the start of a comment. The next line
422 // is a new comment, even though it is logically
423 // part of the previous comment.
426 .Bl -tag -width ".Pa /etc/devd.conf" -compact
427 .It Pa /etc/devd.conf
435 # This will catch link down events on the interfaces fxp0 and ath0
438 match "system" "IFNET";
439 match "subsystem" "(fxp0|ath0)";
440 match "type" "LINK_DOWN";
441 action "logger $subsystem is DOWN";
445 # Match lid open/close events
446 # These can be combined to a single event, by passing the
447 # value of $notify to the external script.
450 match "system" "ACPI";
451 match "subsystem" "Lid";
452 match "notify" "0x00";
453 action "logger Lid closed, we can sleep now!";
457 match "system" "ACPI";
458 match "subsystem" "Lid";
459 match "notify" "0x01";
460 action "logger Lid opened, the sleeper must awaken!";
464 # Try to configure ath and wi devices with pccard_ether
465 # as they are attached.
468 device-name "(ath|wi)[0-9]+";
469 action "/etc/pccard_ether $device-name start";
473 # Stop ath and wi devices as they are detached from
477 device-name "(ath|wi)[0-9]+";
478 action "/etc/pccard_ether $device-name stop";
484 has many additional examples.