Re: [PATCH] proc.5: document 'subset' mount option.

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Hi Matteo,

On Tue, May 14, 2024 at 08:43:49PM GMT, Matteo Croce wrote:
> Il giorno mar 14 mag 2024 alle ore 20:08 Alejandro Colomar
> <alx@xxxxxxxxxx> ha scritto:
> >
> >
> > What is the accepted format?  A CSV of pid numbers?
> >
> > Have a lovely day!
> > Alex
> >
> 
> Hi Alejandro,
> It can only accept the literal "pid" string:

Then 'pid' should be in bold (B), not italics (I).

> # mount -t proc proc_pid pid -o subset=pid
> # mount |grep -w proc_pid
> proc_pid on /tmp/proc/pid type proc (rw,relatime,subset=pid)
> 
> # ll -d pid/{1,$$,cmdline,version}
> ls: cannot access 'pid/cmdline': No such file or directory
> ls: cannot access 'pid/version': No such file or directory
> dr-xr-xr-x. 9 root root 0 May 14 09:43 pid/1
> dr-xr-xr-x. 9 root root 0 May 14 09:43 pid/25146

Hmmm, makes sense.

So, it contains:

/proc/<pid>
/proc/<tid>
/proc/self
/proc/thread-self

And all others are gone, right?

Is anything else included?  Or is anything within those dirs gone?

Have a lovely day!
Alex

> 
> Regards,
> -- 
> Matteo Croce
> 
> perl -e 'for($t=0;;$t++){print chr($t*($t>>8|$t>>13)&255)}' |aplay

lol!  It keeps funny for a surprising long time.

-- 
<https://www.alejandro-colomar.es/>
A client is hiring kernel driver, mm, and/or crypto developers;
contact me if interested.

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