Xiaofan Chen wrote: > You may still need to write a udev rule even if you use the hiddev > or hidraw interface unless the system has already udev rules > in place.
I created the udev rule for my device and copied it to the /etc/udev/rules.d directory. Had to do it using root access (no surprises there), but I can now talk to my Hid device from user mode; which is good news. I am now looking for a 'seamless' way for the end-users of this device to apply this udev rule on their Linux systems. They do this once and on each subsequent use the application works from use account. I can have my application write the rules file to /etc/udev/rules.d directory but for this I would need root access. What is the best way for a C application to ask user to type the root password and then use it to gain root access. Once this is done, the application can then write the rules file. Best regards, and many thanks for your continued help. --- asad -----Original Message----- From: libhid-discuss-bounces+asad.ali=gemalto....@lists.alioth.debian.org [mailto:libhid-discuss-bounces+asad.ali=gemalto....@lists.alioth.debian.org] On Behalf Of Xiaofan Chen Sent: Tuesday, March 31, 2009 12:15 AM To: [email protected] Subject: Re: [libhid-discuss] Talking to an HID device from user account in Linux On Tue, Mar 31, 2009 at 12:47 PM, Peter Stuge <[email protected]> wrote: >> This technique would be orthogonal to the approach of using libhid >> to create our own device driver, but I want to explore all options. > > Then you could also look into hiddev and/or hidraw. They can be used > to communicate with HID devices at a higher level than USB. > > CONFIG_HID_DEV /usr/src/linux/Documentation/usb/hiddev.txt > CONFIG_HIDRAW http://cateee.net/lkddb/web-lkddb/HIDRAW.html (brief) > > hiddev may come with restrictions on which non-HID-class things your > device can do however - but still worth looking into. You may still need to write a udev rule even if you use the hiddev or hidraw interface unless the system has already udev rules in place. I am not familiar with hiddev but there is an example here. http://openprog.altervista.org/OP_eng.html Last time it is said that hiddev is not a good option for generic HID device but hidraw might be an option. http://osdir.com/ml/lib.libusb.devel.general/2007-04/msg00233.html Xiaofan _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss http://libhid.alioth.debian.org/ _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss http://libhid.alioth.debian.org/
