How to run C++ application in Android SHELL

Question

I want to run hello world written on C++ and compiled with Android toolchain 9, but I faced with issue: by default I have no permissions to launch it a

Answer 1

If you have rooted your phone you can do a mount -o remount,rw /mnt/sdcard and it should run.

I've tried it on my Android.

Answer 2

By default, the SD card is mounted with option noexec, that disallows the execution of any file on the card, no matter what it's permissions(even -rwxrwxrwx), so you need to move the file to another location and then execute it.

The easiest is to move the file to /data/local/tmp/ and execute it using the full path (usual POSIX PATH semantics).

> adb push a.out /data/local/tmp/a.out
> adb shell
> chmod 755 /data/local/tmp/a.out
> /data/local/tmp/a.out

This does not require root access and survives reboot.