1 .\" $FreeBSD: head/usr.bin/usbhidaction/usbhidaction.1 225839 2011-09-28 14:52:25Z mav $
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36 .Nd perform actions according to USB HID controls
49 can be used to execute commands when certain values appear on HID controls.
50 The normal operation for this program is to read the configuration file
51 and then become a daemon and execute commands as the HID items specify.
52 If a read from the HID device fails, the program dies; this will make it
53 die when the USB device is unplugged.
55 The options are as follows:
56 .Bl -tag -width indent
58 Toggle the daemon flag.
63 Useful when specified with multiple verbose options to see how files are parsed.
65 Ignore HID items in the configuration file that do not exist in the device.
67 Be verbose, and do not become a daemon.
68 .It Fl c Ar config-file
69 Specify a path name for the configuration file.
71 Specify a path name for the HID usage table file.
73 Specify a path name for the device to operate on.
76 is numeric, it is taken to be the USB HID device number.
78 path, it is taken to be the name of the device under
80 An absolute path is taken to be the literal device pathname.
82 Specify an alternate file in which to store the process ID.
85 The configuration file will be re-read if the process gets a
89 The configuration file has a very simple format.
90 Each line describes an
91 action; if a line begins with a whitespace, it is considered a continuation
95 are considered as comments.
97 Each line has four parts: a name of a USB HID item, a value for that item,
98 a debounce value, and an action.
99 There must be whitespace between the parts.
101 The item names are similar to those used by
104 The value is simply a numeric value.
105 When the item reports this value,
106 the action will be performed.
109 it will match any value.
111 The debounce value is an integer not less than 0.
112 The value of 0 indicates that no debouncing should occur.
113 A value of 1 will only execute the action when the state changes.
114 Values greater than one specify that an action should be performed
115 only when the value changes by that amount.
117 The action is a normal command that is executed with
119 Before it is executed some substitution will occur:
121 will be replaced by the
123 argument on the command line,
125 will be replaced by the numeric value of the HID item,
127 will be replaced by the name of the control, and
129 will be replaced by the name of the HID device.
131 .Bl -tag -width ".Pa /usr/share/misc/usb_hid_usages"
132 .It Pa /usr/share/misc/usb_hid_usages
134 .It Pa /var/run/usbaction.pid
135 The default location of the PID file.
138 The following configuration file can be used to control a pair
139 of Philips USB speakers with the HID controls on the speakers.
140 .Bd -literal -offset indent
141 # Configuration for various Philips USB speakers
142 Consumer:Volume_Up 1 0 mixer -f $1 vol +1
143 Consumer:Volume_Down 1 0 mixer -f $1 vol -1
145 #Consumer:Mute 1 0 mixer -f $1 mute
146 Consumer:Channel_Top.Microsoft:Base_Up 1 0 mixer -f $1 bass +1
147 Consumer:Channel_Top.Microsoft:Base_Down 1 0 mixer -f $1 bass -1
150 A sample invocation using this configuration would be
152 .Dl "usbhidaction -f /dev/uhid1 -c conf /dev/mixer1"
154 The following example controls the mixer volume using a Logitech Wingman.
155 Notice the debounce of 1 for buttons and 5 for the slider.
156 .Bd -literal -offset indent
157 Button:Button_1 1 1 mixer vol +10
158 Button:Button_2 1 1 mixer vol -10
159 Generic_Desktop:Z * 5 mixer vol `echo $V | awk '{print int($$1/255*100)}'`
169 command first appeared in