How to allow Chromium to open local file and access system resources?

[宇超]

I have defined a new interface by adding an IDL and c++ file. but when I tries to open a file on my computer, or get my own MAC address in my codes, an error of "5: Access is denied." will be reported. How can I resolve it?

[PhistucK]

Renderers are operating within a sandbox, which basically blocks their access to anything in the system that is not explicitly allowed.

If you only intend to use this modified browser in a controlled environment, without any access to the open web, you can use --no-sandbox (you might also need --user-data-dir) which disables that sandbox and probably lets you access whatever you want from a renderer.

Beware that using this flag while accessing the open web can have severe consequences - your computer can get hacked completely (especially if you do not update your version whenever a new Chrome version is released).

Otherwise, the way to access system APIs and such (including file system access) is by using IPC to send a message from the renderer process to the browser process, letting the browser process access whatever you want and returning the data back to the renderer via IPC.

Note - "IPC" is either really IPC (the old way) or Mojo (the new and recommended way).

☆PhistucK

On Fri, Jan 13, 2017 at 8:19 AM, 宇超 <myc.sn...@gmail.com> wrote:

I have defined a new interface by adding an IDL and c++ file. but when I tries to open a file on my computer, or get my own MAC address in my codes, an error of "5: Access is denied." will be reported. How can I resolve it?

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