On 10/27/2010 03:05 AM, Sarah Sharp wrote: > On Mon, Oct 25, 2010 at 03:09:21AM -0400, Mike Frysinger wrote: >> This program may easily run as non-root, so no need to keep it in sbin. > > On Debian (and Ubuntu) I've always gotten errors with descriptor > fetching if I try to run lsusb as a non-root user. For example: > > sarah@xanatos:~$ lsusb -v -d 1d6b:0001 > > Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 1.10 > bDeviceClass 9 Hub > bDeviceSubClass 0 Unused > bDeviceProtocol 0 Full speed (or root) hub > bMaxPacketSize0 64 > idVendor 0x1d6b Linux Foundation > idProduct 0x0001 1.1 root hub > bcdDevice 2.06 > iManufacturer 3 > iProduct 2 > iSerial 1 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 25 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xe0 > Self Powered > Remote Wakeup > MaxPower 0mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 1 > bInterfaceClass 9 Hub > bInterfaceSubClass 0 Unused > bInterfaceProtocol 0 Full speed (or root) hub > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0002 1x 2 bytes > bInterval 255 > can't get hub descriptor: Operation not permitted > cannot read device status, Operation not permitted (1) > > The descriptors are fetched fine when I run lsusb as root. This is probably > due to file permissions, but do you really want to move lsusb out of sbin? lsusb's output is useful as-is without parameters to find the correct drivers based on device id when you build the kernel. it would be best to simply provide less output when ran as root. but what really stemmed this issue is: $ usbmodules /usr/bin/usbmodules: line 53: lsusb: command not found usbmodules gets installed into /usr/bin and lsusb to /usr/sbin, and programs from bin can't rely on programs from sbin unless full path is provided. so either move lsusb to bin, or move usbmodules to sbin, status quo is unsustainable -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
