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Re: linux-proc readlink patch
On Jan 9, 6:10pm, Daniel Jacobowitz wrote:
> On Wed, Jan 09, 2002 at 02:18:53PM -0800, Michael Snyder wrote:
> > Nope, that's not the semantics. Cleanups are always done, no later than
> > when the command is finished executing (if not earlier). I even checked
> > to make sure that these were done. There's no memory leak.
> Well, the comments in utils.c are wrong, then :)
> > > (2) It is not, IIRC, always correct in the case of chroots. Handling for
> > > this has changed across Linux versions several times. On 2.2 it seems to be
> > > correct (to my surprise, actually), but I believe it is not on 2.0. Do we
> > > care? Probably not, as 2.0 is now -very- old.
> > Well, if it fails, the code falls back to using the original /proc name.
> By fails, I meant that the output of readlink was not useful. But I
> don't think this is a concern.
So the link was just wrong? If so, then opening /proc/<pid>/exe won't work
If these old kernels managed to somehow open the right file but provide
an incorrect link via readlink(), I suppose we could stat() the file
to see if it exists.