[avrdude-dev] [bug #53279] Permission denied accessing /sys/class/gpio/gpioX/direction would leave pin exported

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?53279>

                 Summary: Permission denied accessing
/sys/class/gpio/gpioX/direction would leave pin exported
                 Project: AVR Downloader/UploaDEr
            Submitted by: None
            Submitted on: Sat 03 Mar 2018 10:10:16 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Michael Cain
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 6.3
         Discussion Lock: Any
     Programmer hardware: linuxgpio
             Device type: RaspberryPi

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Details:

When using a Raspberry Pi to program an atmega2560 using linuxgpio and you do
not have the permission to access /sys/class/gpio/gpioX/direction it would
leave the gpio pin exported.  The only way to unexport the pin would be to
reboot the Rasbperry Pi.

The problem lies in the function linuxgpio_open, change line 280 from:
if (r < 0)
   return r;

TO:
if (r < 0) {
   linuxgpio_unexport(pin);
   return r;
}




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