---
name: "dump_usbdev"
section: "8"
platform: "linux"
package: "usbmgr"
version: "1.0.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/dump_usbdev/8"
---

# dump\_usbdev(8)

Dumps connected USB devices information

## NAME

dump\_usbdev - Dumps connected USB devices information

## SYNTAX

dump\_usbdev \[-Vvds\] \[*file*\]

## DESCRIPTION

The utility **dump\_usbdev** aids you in writing *usbmgr.conf*. After **usbmgr** has been started, running **dump\_usbdev** will dump infomation about all attached devices in a format suitable for *usbmgr.conf*.

If you connect USB devices to your USB HUB, you'll see a line like the following:

```
--------------------------------------------------------
class 0x9 subclass 0x0 protocol 0x0 module <module_name>
--------------------------------------------------------
```

This line will help you writing your */etc/usbmgr/usbmgr.conf* configuration file.

## OPTIONS

- **-V**

  Prints version. It **DOES NOT** exit.

- **-v**

  Verbose mode.

- **-d**

  Debug mode. Prints device data details.

- **-s**

  Print simply the device numbers, not the entire configuration file text.

- *file*

  Specify alternate file to read data from, instead of the default */proc/bus/usb/001/\**. If it's not an absolute path, take as */proc/bugs/usb/001/file*. The file format is a series of register of type **usb\_device\_descriptor**.

## FILES

*/proc/bus/usb/001/\**

## ENVIRONMENT VARIABLES

None.

## EXAMPLES

To run this program the standard way type:

dump\_usbdev

If you want to debug its output, you can create an appropriate file as *myfile* and call it:

dump\_usdev /path/to/myfile

In the following output:

```
--------------------------------------------------------
class 0x9 subclass 0x0 protocol 0x0 module <module_name>
--------------------------------------------------------
```

"class 0x9" means USB HUB. If no USB devices are connected, only the root HUB will appear. Modifying "\<module\_name\>" would complete the configuration for this device (HUB). In the case of a HUB, you should change "module\_name" to "none" because the HUB driver is included in usbcore.

After a USB mouse has been connected to the HUB, running  **dump\_usbdev** will give you the following:

```
-------------------------------------------------------------
class 0x9 subclass 0x0 protocol 0x0 module <module_name>
vendor 0x56e product 0x4 module <module_name>
-------------------------------------------------------------
```

The 2nd line is new. This is the infomation about the USB  mouse. The USB mouse requires the "hid" and "mousedev" drivers. So, "\<module\>" should be changed to "hid , mousedev".

So the complete *usbmgr.conf* would look like this:

```
-------------------------------------------------------------
class 0x9 subclass 0x0 protocol 0x0 module none
vendor 0x56e product 0x4 module hid , mousedev
-------------------------------------------------------------
```

You should copy this into */etc/usbmgr/usbmgr.conf*, and then run **update\_usbdb** to create the configuration data.

## AUTHORS

Shuu Yamaguchi \<shuu@wondernetworkresources.com\>

This manual page was written by Esteban Manchado Velázquez \<zoso@debian.org\>, for the Debian GNU/Linux system (but may be used by others).

## SEE ALSO

[**usbmgr**(8)](/usbmgr/8.md), [**update\_usbdb**(8)](/update_usbdb/8.md), [**usbmgr.conf**(5)](/usbmgr.conf/5.md)