I trust that this code is correct, as it has apparently been in use for quite some time now. With this i can use the tool with normal user. I mean, they look like they can get ridiculous if you’re dealing with individual product IDs and whatnot, but they seem pretty damn tame for what they do. Sign up using Facebook. Braiam Code snippet added.
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Linux Kernel Driver DataBase: CONFIG_HIDRAW: /dev/hidraw raw HID device support
So, what character special means? Also, I’m working with an experimental HID, so I’m totally okay with getting my brain full of hurts-so-good udev stuff it’s necessary. While I appreciate the extra info, it doesn’t actually help with my lack of permissions problem I’ve added a comment located where the relevant errno reading took place in GDB.
Now lets look what our systems think about this: I literally stepped through code that called the POSIX open method, and got the errno for insufficient permissions. The following line was placed in a.
CONFIG_HIDRAW: /dev/hidraw raw HID device support
So, how this solve your question? Home Questions Tags Users Unanswered. Now lets look what our systems think about this:. I’m seeing stuff about udev rules and saw this on the net, but the world of udev is like a foreign land to me. Character special files or character devices relate to devices through which the system transmits data one character at a time by, for example, getchar.
Email Linuxx, but never shown. Running cat on the file as a normal user results in an insufficient permissions error, while running under su results in a successful albeit meaningless cat operation.
Sign up using Facebook. Not quite as brain melting as I’d expected.
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I trust that this code is correct, as it has apparently been in use linuz quite some time now. Post as a guest Name. Sign up using Email and Password.
devices – /dev/hidraw: read permissions – Unix & Linux Stack Exchange
With myself added to the plugdev group, everything’s dandy. Ok, first of all, lets see what hidraw means and what is composed of: Take into account that only the kernel has direct access in most of the cases to the devices, and you should only use the calls provided in userspace to communicate with these devices.
This is meant as crudebut in the Linux ambiance it also means direct. This worked for me as i wanted to use Roccat yidraw tool, and it needed root permissions.
I’m seeing stuff about udev rules and saw this on the net, but the world of udev is like a foreign land to me, and if there’s some sort of a simpler solution where I just add myself to a group that’d be dandy A human interface device or HID is a type of computer device that interacts directly with, and most often takes input from, humans and may deliver output to humans.