I am rather new to mobile develoipment, can somebody tell me how exactly I can allow files to run on Android? I want to run proot commands with bash like it’s done in Termux

I took proot from here and build binary like in instructions. It looks fine

I took bash binary from here

I add my binary proot and bash to assets and in code I transfer them with escalation of permissions

assets.open(filename).use { inputStream ->
    FileOutputStream(file).use { outputStream ->
        inputStream.copyTo(outputStream)
    }
}
file.setExecutable(true)

Then I use them from that file dir

try {     
    val prootCommand = "${filesDir}/proot -0 -b /dev -b /proc -b ${filesDir}:/data /bin/sh -c "$command""
    val process = Runtime.getRuntime().exec(prootCommand)
    val results = process.inputStream.bufferedReader().use { it.readText() } 
} catch (e: IOException) {
    e.printStackTrace() 
}

I always get the permission error 13.