Tag Archives: android

Cross compile fstrim for Android on Ubuntu 18.10

Install compiler

$ sudo apt install gcc-arm-linux-gnueabi 

Get sources and compile

$ apt source util-linux
$ cd util-linux-*
$ ./autogen.sh
$ ./configure --host=arm-linux-gnueabi CFLAGS="-static"
$ make LDFLAGS="--static" fstrim
# OK with warnings

Check

$ file fstrim
fstrim: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, for GNU/Linux 3.2.0, BuildID[sha1]=5f6d5789d8c27197fb5fadbc18f5cd506b330dc4, with debug_info, not stripped

Override DNS is #malicious-harmful!?

Hi guys,
my app is temporarily out of the Play Store. I hope it’s really a temporary thing.

It seems that my last beta (beta78), the one available only to the beta testers, was not compliant to the 4.4 section of the Developer Distribution Agreement. But let me explain in the right order.

50 minutes ago I received an e-mail from the Google Play Support. It was notifying me of some kind of violation. The e-mail was referring to the app: “Virtual Button ROOT MENU” (package ID jp.ne.neko.freewing.VirtualButtonRootMenu).
It seems that that app, which disables SELinux, violates the Developer Distribution Agreement

Don’t transmit or link to… items that may introduce security vulnerabilities to or harm user devices, apps, or personal data.

OK.

I’m serious it wasn’t some kind of phishing, they simply sent me the right notice but referring to someone else.

My latest beta has an advanced option which, if chosen, temporary lowers the device security by disabling SELinux on the device. It applies the DNS and brings SELinux back again. So it seems I’m guilty.

And now

Disabling SELinux is not approved by the Play Store.

In my humble opinion it was not so obvious, but anyway, I repackaged a stable release and a beta without the SELinux thing. I’m waiting to see my app online again.