Re: 4096 byte limit to /proc/PID/environ ?

Guy Streeter
2007-08-21T14:40:29Z

On 8/15/07, H. Peter Anvin <hpa@zytor.com> wrote:
> Guy Streeter wrote:
> > On 6/1/06, James Pearson <james-p@moving-picture.com> wrote:
> >> H. Peter Anvin wrote:
> >>> I think this is the wrong approach.
> >>>
> >>> Many of these should probably be converted to seq_file, but in the
> >>> particular case of environ, the right approach is to observe the fact
> >>> that reading environ is just like reading /proc/PID/mem, except:
> >>>
> >>> a. the access restrictions are less strict, and
> >>> b. there is a range restriction, which needs to be enforced, and
> >>> c. there is an offset.
> >>>
> >>> Pretty much, take the guts from /proc/PID/mem and generalize it
> >>> slightly, and you have the code that can run either /proc/PID/mem or
> >>> /proc/PID/environ.
> >> The following patch is based on the /proc/PID/mem code appears to work fine.
> >>
> >
> > This thread has gone stale. The PAGE_SIZE limit still exists. Is this
> > solution acceptable?
> >
>
> Can we avoid the code duplication?
>
>

I hope you're not asking me. I don't know the proc fs code well enough
to re-write this.

--Guy