我如何从Android.mk运行脚本并读取它的退出代码（返回值）

Question

I'm running a shell script from Android.mk which does some copying and stuff, and I want to read the return value that the script returns, if it fails, I want to halt the compilation.

$(shell $(LOCAL_PATH)/makescript.sh)

and I want it to be like this:

value = ./makescript.sh
if value = 1 halt compilation of Android.mk file.

Answer 1

I think for what you'd like to achieve, this should work:

ifeq (1,$(shell $(LOCAL_PATH)/makescript.sh))
$(error your error message.)
endif

And if you want to do it in the assign-value way,

return_val := $(shell $(LOCAL_PATH)/makescript.sh)
ifeq (1, $(return_val))
$(error your error message.)
endif

Answer 2

You can run your script as a normal process and get the input stream that is returned by your script.

    try{
        Process proccess = new ProcessBuilder( )
            .command( "path to yur script file" )
            .redirectErrorStream( true )
            .start();

        InputStream in = new BufferedInputStream( proccess.getInputStream() );
        in.close();
    }catch( IOException ioe ){
        ioe.printStackTrace();
    }