[PATCH] mkimage: clarify error message for empty input files

[Simon Glass]

On Sun, 1 Aug 2021 at 16:23, Thomas Hebb <tommyhebb at gmail.com> wrote:
>
> Currently, an empty imput file causes `mmap()` to fail, and you get an
> error like "mkimage: Can't read file.img: Invalid argument", which is
> extremely unintuitive and hard to diagnose if you don't know what to
> look for. Add an explicit check for an empty file and provide a clear
> error message instead.
>
> We already bounds check the image size when listing and re-signing
> existing images, so we only need this check here, when opening data
> files going into a image.
>
> Signed-off-by: Thomas Hebb <tommyhebb at gmail.com>
>
> ---
>
>  tools/mkimage.c | 6 ++++++
>  1 file changed, 6 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>

(s/imput/input/ as you note)