I've finally gotten around to playing with RasPi GPIOs, using Gert van Loo and Dom's C code at the RasPi Wiki. It works fine, except that you have to run the executable as root or use sudo to access /dev/mem.
Does anyone here know how to access /dev/mem as a normal user?
Roger Wolff wrote:
Now back to your problem...
If you make a little program that allows you to manipulate just the GPIO outputs, that won't allow you to cause all the other mischief you'd be able to…
Unix has a "security model". As a normal users you can do stuff, but you should not be able to access other people's files on the same computer. And as a user you should not be able to cause the computer…
Keith Chiem wrote:
$ sudo chown pi /dev/mem
That will not work. As well as any access controls imposed by the filesystem, you also need to have capability CAP_SYS_RAWIO to open the /dev/mem device. So you…
