Chris Spencer wrote:
I have an AVR ISP mkII programmer, and I can only access it with avrdude
when I'm root. As a normal user I get the error 'avrdude: usb_open():
cannot read serial number "error sending control message: Operation not
permitted"'
What permissions in Linux do you have to change to access the programmer
as a normal user?
First do a lsusb as root. Then you should be able to change the
permissions on the corresponding /proc/bus/usb/<bus#>/<dev#> file to 777
or whatever.
But this will only last until you unplug the mkII, if you have
devfs/hotplug/usbdevfs, because these make device nodes dynamically.
If you want a more lasting solution...
Assuming you have hotplug and usbdevfs (which is the currently blessed
scheme for doing such things), you should be able to set up an automatic
chmod/chgrp script in /etc/hotplug/usb . Look at
/etc/hotplug/usb/usbserial and /etc/hotplug/usb/usbserial.usermap, for
instance.
You'll need the vendor id/product id pair (run lsusb as root to get this).
Or you could just add it to /etc/hotplug/usb/usbserial.usermap and edit
/etc/hotplug/usb/usbserial to set the permissions/group ownership as needed.
Read up on hotplug for more info.
--
Ned Konz
[EMAIL PROTECTED]
http://bike-nomad.com
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