FR: add support to push data like lgup etc does

[steadfasterX]

it would be nice if we could send data (in my case image files like twrp , system image etc) when in download mode.
would that be possible? This could make the kdz flasher tools obsolete for me due to the fact that i can extract them with the kdztools, then i want to push them to the device and flash them with dd..

Any chance that this may come one day?

[steadfasterX]

just realized this PR #1

[sim590]

This could make the kdz flasher tools obsolete for me due to the fact that i can extract them with the kdztools, then i want to push them to the device and flash them with dd..

I've been looking all around for a way to flash kdz stock ROM files from linux.

@steadfasterX If I understand correctly, I could extract the files from the kdz image, then push them on the phone (using adb push), then just do adb shell and dd my file on the appropriate device file? If so, I have two questions:

1. What's the format of the file I should push on the phone (rather than the kdz)? Is it some .img file generated by one of the scripts of this repository or a ZIP archive (like LineageOS install ROMs)?
2. What's the device file I should dd the files on (/dev/block/mmcblk0pX)?