2 .\" Copyright (c) 2002 M. Warner Losh
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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:
97 .Bd -literal -offset indent
101 substatement "value";
105 The following sub-statements are supported within the
108 .Bl -tag -width ".Ic directory"
109 .It Ic directory Qq Ar /some/path ;
110 Adds the given directory to the list of directories from which
112 will read all files named "*.conf" as further
116 statements can be used.
117 .It Ic pid-file Qq Pa /var/run/devd.pid ;
119 .It Ic set Ar regexp-name Qq Ar (some|regexp) ;
120 Creates a regular expression and assigns it to the variable
122 The variable is available throughout the rest of
123 the configuration file.
124 All regular expressions have an implicit
129 The following sub-statements are supported within the
134 .Bl -tag -width ".Ic directory"
135 .It Ic action Qq Ar command ;
136 Command to execute upon a successful match.
138 .Dq Li "/etc/pccard_ether $device-name start" .
139 .It Ic class Qq Ar string ;
140 This is shorthand for
141 .Dq Ic match Qo Li class Qc Qq Ar string .
142 .It Ic device-name Qq string ;
143 This is shorthand for
144 .Dq Ic match Qo Li device-name Qc Qq Ar string .
145 This matches a device named
147 which is allowed to be a regular expression or a variable previously created
148 containing a regular expression.
152 is available for later use with the
155 .It Ic match Qo Ar variable Qc Qq Ar value ;
156 Matches the content of
162 may be a regular expression.
169 statement takes care of all device matching.
170 For a partial list of variables, see below.
171 .It Ic media-type Qq Ar string ;
174 will match devices that have the given media type.
175 Valid media types are:
183 .It Ic subdevice Qq Ar string ;
184 This is shorthand for
185 .Dq Ic match Qo Li subdevice Qc Qq Ar string .
188 The following sub-statements are supported within the
191 .Bl -tag -width ".Ic directory"
192 .It Ic action Qq Ar command ;
194 .It Ic match Qo Ar variable Qc Qq Ar value ;
195 Matches the content of
201 may be a regular expression.
202 For a partial list of variables, see below.
205 The following sub-statements are supported within the
210 variable is available inside this statement and contains, a value, depending
211 on which system and subsystem that delivered the event.
212 .Bl -tag -width ".Ic directory"
213 .It Ic action Qq Ar command ;
214 Command to execute upon a successful match.
216 .Dq Li "/etc/rc.d/power_profile $notify" .
217 .It Ic match Qo Ar system | subsystem | type | notify Qc Qq Ar value ;
220 statements can exist within a
224 can be either a fixed string or a regular expression.
225 Below is a list of available systems, subsystems, and types.
226 .It Ic media-type Qq Ar string ;
229 .Ss Variables that can be used with the match statement
230 A partial list of variables and their possible values that can be used together
235 .Bl -tag -width ".Li manufacturer" -compact
239 Device name of parent bus.
241 Device node path if one is created by the
255 Device Sub-class (USB)
257 Name of attached/detached device.
265 Interface Class (USB)
267 Interface Protocol (USB)
269 Interface Sub-class (USB)
271 Manufacturer ID (pccard).
273 Peripheral mode (USB)
275 Match the value of the
281 Hub port number (USB)
283 Product ID (pccard/USB).
285 Hardware revision (USB)
295 Matches a subsystem of a system, see below.
297 Matches a system type, see below.
299 Type of notification, see below.
304 A partial list of systems, subsystems, and types used within the
308 .Bl -tag -width ".Li coretemp" -compact
311 Events related to the ACPI subsystem.
312 .Bl -tag -width ".Sy Subsystem" -compact
315 AC line state ($notify=0x00 is offline, 0x01 is online).
317 Button state ($notify=0x00 is power, 0x01 is sleep).
321 Lid state ($notify=0x00 is closed, 0x01 is open).
323 Processor state/configuration ($notify=0x81 is a change in available Cx states).
329 Events related to the network subsystem.
330 .Bl -tag -width ".Sy Subsystem" -compact
335 is the actual name of the network interface on which the event
337 .Bl -tag -width ".Li LINK_DOWN" -compact
340 Carrier status changed to UP.
342 Carrier status changed to DOWN.
344 The network interface is attached to the system.
346 The network interface is detached from the system.
350 Events related to the
353 .Bl -tag -width ".Sy Subsystem" -compact
356 .Bl -tag -width ".Li DESTROY" -compact
369 Events related to the USB subsystem.
370 .Bl -tag -width ".Sy Subsystem" -compact
373 .Bl -tag -width ".Li DETACH" -compact
376 USB device is attached to the system.
378 USB device is detached from the system.
381 .Bl -tag -width ".Li DETACH" -compact
384 USB interface is attached to a device.
386 USB interface is detached from a device.
390 Events related to the
393 .Bl -tag -width ".Sy Subsystem" -compact
396 Notification that the CPU core has reached critical temperature.
397 .Bl -tag -width ".Ar temperature" -compact
400 String containing the temperature of the core that has become too hot.
404 Events related to the kernel.
405 .Bl -tag -width ".Sy Subsystem" -compact
408 Information about the state of the system.
409 .Bl -tag -width ".li resume" -compact
412 Notification that the system has woken from the suspended state.
417 A link state change to UP on the interface
419 would result in the following notify event:
420 .Bd -literal -offset indent
421 system=IFNET, subsystem=fxp0, type=LINK_UP
424 An AC line state change to
426 would result in the following event:
427 .Bd -literal -offset indent
428 system=ACPI, subsystem=ACAD, notify=0x00
431 Comments may appear anywhere that whitespace may appear in a
433 To appeal to programmers of all kinds, they can
434 be written in C, C++, or shell/Perl constructs.
436 C-style comments start with the two characters
438 (slash, star) and end with
441 Because they are completely delimited with these characters,
442 they can be used to comment only a portion of a line or to span
445 C-style comments cannot be nested.
446 For example, the following is
447 not valid because the entire comment ends with the first
449 .Bd -literal -offset indent
450 /* This is the start of a comment.
451 This is still part of the comment.
452 /* This is an incorrect attempt at nesting a comment. */
453 This is no longer in any comment. */
456 C++-style comments start with the two characters
458 (slash, slash) and continue to the end of the physical line.
459 They cannot be continued across multiple physical lines; to have
460 one logical comment span multiple lines, each line must use the
464 .Bd -literal -offset indent
465 // This is the start of a comment. The next line
466 // is a new comment, even though it is logically
467 // part of the previous comment.
470 .Bl -tag -width ".Pa /etc/devd.conf" -compact
471 .It Pa /etc/devd.conf
479 # This will catch link down events on the interfaces fxp0 and ath0
482 match "system" "IFNET";
483 match "subsystem" "(fxp0|ath0)";
484 match "type" "LINK_DOWN";
485 action "logger $subsystem is DOWN";
489 # Match lid open/close events
490 # These can be combined to a single event, by passing the
491 # value of $notify to the external script.
494 match "system" "ACPI";
495 match "subsystem" "Lid";
496 match "notify" "0x00";
497 action "logger Lid closed, we can sleep now!";
501 match "system" "ACPI";
502 match "subsystem" "Lid";
503 match "notify" "0x01";
504 action "logger Lid opened, the sleeper must awaken!";
508 # Match a USB device type
511 match "system" "USB";
512 match "subsystem" "INTERFACE";
513 match "type" "ATTACH";
514 match "intclass" "0x0e";
515 action "logger USB video device attached";
519 # Try to configure ath and wi devices with pccard_ether
520 # as they are attached.
523 device-name "(ath|wi)[0-9]+";
524 action "/etc/pccard_ether $device-name start";
528 # Stop ath and wi devices as they are detached from
532 device-name "(ath|wi)[0-9]+";
533 action "/etc/pccard_ether $device-name stop";
539 has many additional examples.