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 and I can't change permissions using chmod`. I used `Android 2.3.3 - Api Level 10` Application was compiled by cross compiler for `API level 9` Procedure: Compile application: ~/toolchain_andr9/bin/ arm-linux-androideabi-g++ helloworld.cpp Then send application to SDCARD on the emulator: ``` >adb push a.out /mnt/sdcard ``` then go to SHELL and try to run `a.out`: ``` >adb shell > >/mnt/sdcard/a.out ``` And result is: ``` >`/mnt/sdcard/a.out: permission denied` ``` command `ls -l` shows rights for `a.out`: ``` >`----rwxr-x system sdcard_rw 863656 2012-04-12 22:42 a.out` ``` I tried to change permissions: ``` >chmod 777 /mnt/sdcard/a.out ``` But rights don't change: ``` >`----rwxr-x system sdcard_rw 863656 2012-04-12 22:42 a.out` ``` I think I have left some important thing using android. Could anybody help me and give me a way how to…

Accepted Answer

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.

How to run C++ application in Android SHELL

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