(question) how to modify or erase file about pongoos

[Clindbergh]

Probably more reasonable to just boot a Linux ramdisk and use existing drivers tbh...

@Siguza What do you think is the easiest way to get file system access with a minimal image? I have a ios 13.5 iphone8,1 that doesn't boot and with an ios 14 update already initiated but booting into recovery mode. Possibly sep-firmware.img4 is already gone, hopefully not. Filesystem access to backup files before updating is what I'm going for here.

[rickmark]

So on "minimal images" I'd say two roads:

1. Use sandcastle since it's already a linux image
2. Boot the Apple restore/update ramdisk because this is purpose built for this (you'd have to replace asr with something useful)

[rickmark]

In order to use the filesystem, you'll need something far higher up the boot chain than pongoOS. Pongo is a shim for the next phase and doesn't have the required Flash and filesystem drivers. If the device is an X or prior try checkra1n which does enable this by booting a jailbroken XNU kernel.

[filipef101]

@rickmark Is that the "terminal" that boots up?

[rickmark]

Yes it is. PongoOS is this repo. It has a module system so hopefully people write some block device/filesystem modules to provide what you need.

[Siguza]

Probably more reasonable to just boot a Linux ramdisk and use existing drivers tbh...

[danieltroger]

@rickmark Re: the second option

He already has a customized ramdisk with telnet and bunch of utilities on it. The question is how he'd load devicetree, kernelcache and trustcache with pongoOS. I know there's the ramdisk command, but just sending a ramdisk and the ramdisk command isn't enough to boot it iirc.