[PATCH v2] kexec-tools: Determine if the image is lzma commpressed

[Simon Horman <horms@verge.net.au>]

On Wed, Mar 30, 2022 at 01:33:26PM +0800, Lichen Liu wrote:
> Currently there are 2 functions for decompressing compressed image. The
> zlib_decompress_file() will determine if the image is compressed by gzip
> before read, but lzma_decompress_file() will not. This can cause misleading
> information to be printed when the image is not compressed by lzma and
> debug option is used:
> 
> ]# kexec -d -s -l /boot/vmlinuz-5.14.10-300.fc35.x86_64 \
> --initrd /boot/initramfs-5.14.10-300.fc35.x86_64.img \
> --reuse-cmdline
> Try gzip decompression.
> Try LZMA decompression.
> lzma_decompress_file: read on /boot/vmlinuz-5.14.10-300.fc35.x86_64 of
> 65536 bytes failed
> 
> Add a helper function is_lzma_file() to help behave consistently.
> 
> Signed-off-by: Lichen Liu <lichliu@redhat.com>
> ---
> Changes in v2:
> - add a fclose() when file is too small.

Hi Lichen Liu,

I have already applied v1 of this patch,
so could you consider providing a follow-up patch
which contains the delta between v1 and v2?

Thanks!

Ref: https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git/commit/1b03cf7adc3c