On Tue, Oct 26, 2010 at 8:23 PM, Samuli Suominen wrote: > 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. FYI this is a script i wrote and upstream never got around to merging, so it's only in Gentoo but i dont think the inability to read a few pieces of info as non-root on some systems should prevent moving to /usr/bin. there is plenty of info that is accessible to non-root users. -mike -- 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
