[fpc-pascal] Access GPIO pins on RPi2 without root?

[Lukasz Sokol]

On 07/10/15 08:02, Bo Berglund wrote:
> How can one control the GPIO outputs on a Raspberry Pi2 without
> needing the program to run as root? I am using Raspbian Wheezy and I
> need to add two relays controls to my program.
> The pages I have found with google are for the original Pi so the
> connector referenced is the wrong size and it is also always mentioned
> that the program must be run as root.
> My program must be started every minute by cron so I don't know how
> this will happen...
> (Not so used to Linux)
> 
> Do I need to install some driver in Raspbian to allow access to the
> GPIO ports from FPC?
> 
> 

Apart from running SUID Root, which is generally discouraged (there is lots of answers on why setuid root is bad)

I'd probably search for some udev rules to make up - to chown the gpio
devices in /dev to root:gpio, (for example) and your unprivileged user to
be a member of group gpio;

( possibly https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=9667, but
also worth checking out other https://www.google.com/search?q=raspberry+pi+udev+gpio+user&ie=utf-8&oe=utf-8 results.)

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