Re: [PATCH 1/2] pid: add pidfd_open()

[Aleksa Sarai <cyphar@xxxxxxxxxx>]

On 2019-05-15, Christian Brauner <christian@xxxxxxxxxx> wrote:
> On Wed, May 15, 2019 at 04:00:20PM +0200, Yann Droneaud wrote:
> > Would it be possible to create file descriptor with "restricted"
> > operation ?
> > 
> > - O_RDONLY: waiting for process completion allowed (for example)
> > - O_WRONLY: sending process signal allowed
> 
> Yes, something like this is likely going to be possible in the future.
> We had discussion around this. But mapping this to O_RDONLY and O_WRONLY
> is not the right model. It makes more sense to have specialized flags
> that restrict actions.

Not to mention that the O_* flags have silly values which we shouldn't
replicate in new syscalls IMHO.

-- 
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>

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