如何使用roottools获得文件许可

Question

I want to obtain linux file permissions without parsing ls -l. Since I will be using RootTools, I see it has a Permissions class, but how should I obtain permission data of a File into that object?

Answer 1

If you can't modify source use reflection:

private Permissions RootToolsInternalMethods_getPermissions(String line)
{
    try
    {
        RootTools rootTools = new RootTools();
        Method method = rootTools.getClass().getDeclaredMethod("getInternals");
        method.setAccessible(true);
        RootToolsInternalMethods rootToolsInternalMethods = (RootToolsInternalMethods)method.invoke(rootTools);
        return rootToolsInternalMethods.getPermissions(line);
    }
    catch (Exception ignore) {}

    return null;
}

Answer 2

RootToolsInternalMethods have getPermissions(String) method, but they can only be accessed in RootTools class

From RootTools source

private static final RootToolsInternalMethods getInternals() {
    if (rim == null) {
        RootToolsInternalMethods.getInstance();
        return rim;
    } else {
        return rim;
    }
}

Seems like I have to modify RootTools source and get the permissions from ls -l output

getInternals().getPermissions("ls -l output line");