DEVD.CONF(5) BSD File Formats Manual DEVD.CONF(5)NAMEdevd.conf — configuration file for devd(8)DESCRIPTION
General Syntax
A devd(8) configuration consists of two general features, statements and
comments. All statements end with a semicolon. Many statements can con‐
tain substatements, which are also terminated with a semicolon.
The following statements are supported:
attach Specifies various matching criteria and actions to perform when
a newly attached device matches said criteria.
detach Specifies various matching criteria and actions to perform when
a newly detached device matches said criteria.
nomatch Specifies various matching criteria and actions to perform when
no device driver currently loaded in the kernel claims a (new)
device.
notify Specifies various matching criteria and actions to perform when
the kernel sends an event notification to userland.
options Specifies various options and parameters for the operation of
devd(8).
Statements may occur in any order in the configuration file, and may be
repeated as often as required. Further details on the syntax and meaning
of each statement and their substatements are explained below.
Each statement, except options has a priority (an arbitrary number) asso‐
ciated with it, where ‘0’ is defined as the lowest priority. If two
statements match the same event, only the action of the statement with
highest priority will be executed. In this way generic statements can be
overridden for devices or notifications that require special attention.
The general syntax of a statement is:
statement priority {
substatement "value";
...
substatement "value";
};
Sub-statements
The following sub-statements are supported within the options statement.
directory "/some/path";
Adds the given directory to the list of directories from which
devd(8) will read configuration files. Any number of
directory statements can be used.
set regexp-name "(some|regexp)";
Creates a regular expression and assigns it to the variable
regexp-name. The variable is avaiable throughout the rest of
the configuration file. All regular expressions have an
implicit ‘^$’ around them.
The following sub-statements are supported within the attach and detach
statements.
action "command";
Command to execute upon a successful match. Example
“/etc/pccard_ether $device-name start”.
class "string";
This is shorthand for “match "class" "string"”.
device-name "string";
This is shorthand for “match "device-name" "string"”. This
matches a device named string, which is allowed to be a regu‐
lar expression or a variable previously created containing a
regular expression. The “device-name” variable is available
for later use with the action statement.
match "variable" "value";
Matches the content of value against variable; the content of
value may be a regular expression. Not required during attach
nor detach events since the device-name statement takes care
of all device matching. For a partial list of variables, see
below.
media-type "string";
For network devices, media-type will match devices that have
the given media type. Valid media types are: “Ethernet”,
“802.11”, “ATM”, and “CARP”.
subdevice "string";
This is shorthand for “match "subdevice" "string"”.
The following sub-statements are supported within the nomatch statement.
action "command";
Same as above.
match "variable" "value";
Matches the content of value against variable; the content of
value may be a regular expression. For a partial list of
variables, see below.
The following sub-statements are supported within the notify statement.
The “notify” variable is avaiable inside this statement and contains, a
value, depending on which system and subsystem that delivered the event.
action "command";
Command to execute upon a successful match. Example
“/etc/rc.d/power_profile $notify”.
match "system | subsystem | type | notify" "value";
Any number of match statements can exist within a notify
statement; value can be either a fixed string or a regular
expression. Below is a list of avaiable systems, subsystems,
and types.
media-type "string";
See above.
Variables that can be used with the match statement
A partial list of variables and their possible values that can be used
together with the match statement.
Variable Description
bus Device name of parent bus.
cisproduct CIS-product.
cisvendor CIS-vendor.
class Device class.
device Device ID.
device-name Name of attached/detached device.
function Card functions.
manufacturer Manufacturer ID (pccard).
notify Match the value of the “notify” variable.
product Product ID (pccard).
serial Serial Number (USB).
slot Card slot.
subvendor Sub-vendor ID.
subdevice Sub-device ID.
subsystem Matches a subsystem of a system, see below.
system Matches a system type, see below.
type Type of notification, see below.
vendor Vendor ID.
Notify matching
A partial list of systems, subsystems, and types used within the notify
mechanism.
System
ACPI Events related to the ACPI subsystem.
Subsystem
ACAD AC line state ($notify=0x00 is offline, 0x01 is
online).
Button Button state ($notify=0x00 is power, 0x01 is sleep).
CMBAT Battery events.
Lid Lid state ($notify=0x00 is closed, 0x01 is open).
Thermal Thermal zone events.
IFNET Events related to the network subsystem.
Subsystem
interface The “subsystem” is the actual name of the network
interface on which the event took place.
Type
LINK_UP Carrier status changed to UP.
LINK_DOWN Carrier status changed to DOWN.
A link state change to UP on the interface “fxp0” would result in the
following notify event:
system=IFNET, subsystem=fxp0, type=LINK_UP
An AC line state change to “offline” would result in the following event:
system=ACPI, subsystem=ACAD, notify=0x00
Comments
Comments may appear anywhere that whitespace may appear in a configura‐
tion file. To appeal to programmers of all kinds, they can be written in
C, C++, or shell/Perl constructs.
C-style comments start with the two characters ‘/*’ (slash, star) and end
with ‘*/’ (star, slash). Because they are completely delimited with
these characters, they can be used to comment only a portion of a line or
to span multiple lines.
C-style comments cannot be nested. For example, the following is not
valid because the entire comment ends with the first ‘*/’:
/* This is the start of a comment.
This is still part of the comment.
/* This is an incorrect attempt at nesting a comment. */
This is no longer in any comment. */
C++-style comments start with the two characters ‘//’ (slash, slash) and
continue to the end of the physical line. They cannot be continued
across multiple physical lines; to have one logical comment span multiple
lines, each line must use the ‘//’ pair. For example:
// This is the start of a comment. The next line
// is a new comment, even though it is logically
// part of the previous comment.
FILES
/etc/devd.conf The devd(8) configuration file.
EXAMPLES
#
# This will catch link down events on the interfaces fxp0 and ath0
#
notify 0 {
match "system" "IFNET";
match "subsystem" "(fxp0|ath0)";
match "type" "LINK_DOWN";
action "logger $subsystem is DOWN";
};
#
# Match lid open/close events
# These can be combined to a single event, by passing the
# value of $notify to the external script.
#
notify 0 {
match "system" "ACPI";
match "subsystem" "Lid";
match "notify" "0x00";
action "logger Lid closed, we can sleep now!";
};
notify 0 {
match "system" "ACPI";
match "subsystem" "Lid";
match "notify" "0x01";
action "logger Lid opened, the sleeper must awaken!";
};
#
# Try to configure ath and wi devices with pccard_ether
# as they are attached.
#
attach 0 {
device-name "(ath|wi)[0-9]+";
action "/etc/pccard_ether $device-name start";
};
#
# Stop ath and wi devices as they are detached from
# the system.
#
detach 0 {
device-name "(ath|wi)[0-9]+";
action "/etc/pccard_ether $device-name stop";
};
The installed /etc/devd.conf has many additional examples.
SEE ALSOdevd(8)BSD October 2, 2008 BSD
