GPIO export problem

[jkridner]

As I recall, doing a second export will cause the exported interface to go away. Yep…

/sys/class/gpio/export not idempotent, unexports gpios

/sys/class/gpio/export will unexport a pin if accessed twice. Is this a bug? $ echo 13 > /sys/class/gpio/export $ ls /sys/class/gpio/gpio13 active_low device direction edge label power subsystem uevent value $ echo 13 > /sys/class/gpio/export -bash: echo: write error: Operation not permitted $ ls /sys/class/gpio/gpio13 ls: cannot access ‘/sys/class/gpio/gpio13’: No such file or directory Expected behavior: gpio13 should still be there after the second export. Observed behavior: gpio13 d…

Any chance you exported a second time?