User space tools

[Leszek Dubiel <leszek@xxxxxxxxx>]

Different bash scripts from different servers
ssh to Raspberry PI and change GPIO line:

             /dev/gpiochip2, pin number 7.

like this:

   gpioset -b -msignal /dev/gpiochip2 7=1



If another script does for example:

    gpioset -b -msignal /dev/gpiochip2 7=0

then it gets:

    gpioset: error setting the GPIO line values: Device or resource busy



So every bash script kills previous instance
before setting gpio line:

    pkill -ef "^gpioset .* /dev/gpiochip2 7=[01]$"
    gpioset -b -msignal /dev/gpiochip2 7=0



Pkill is bad solution:

1. it is very slow, because it has to grep full command lines.

2. it doesn't work if one of bash scripts
used little bit different command, for example:

         gpioset -b -msignal /dev/gpiochip2 7=0 5=2



Is there a better way to kill o replace
previous instance of running gpioset?

Or is it going to be better in new version v2 of user space tools?