Commits on Jun 4, 2020

1. iio_attr: after automaticed testing, make return codes consistant. …

   After putting together some automated tests for iio_attr (which I will
   check in later), fix some inconsistancies in iio_attr, which makes the
   return codes return error on errors, and success on a success.
   
   Split up reporting of buffers, to make it easier to find scan, input and
   output buffers. Now you can see things like this:
   rgetz@brain:~/github/libiio/build$ ./tests/iio_attr -a usb -i -o -s  -c
   Using auto-detected IIO context at URI "usb:3.49.5"
   IIO context has 5 devices:
   	iio:device0, adm1177: found 0 scan, 0 output, 2 input channels
   	iio:device1, ad9361-phy: found 0 scan, 5 output, 4 input channels
   	iio:device2, xadc: found 0 scan, 0 output, 10 input channels
   	iio:device3, cf-ad9361-dds-core-lpc: found 2 scan, 6 output, 0 input channels
   	iio:device4, cf-ad9361-lpc: found 2 scan, 0 output, 2 input channels
   
   Which makes it easier to understand a device.
   
   Signed-off-by: Robin Getz <[email protected]>

   

   rgetz committed Jun 4, 2020
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