* default-directory safe file local variable but no check for same if file-exists-p
@ 2009-06-05 0:20 MON KEY
2009-06-05 14:31 ` Stefan Monnier
0 siblings, 1 reply; 4+ messages in thread
From: MON KEY @ 2009-06-05 0:20 UTC (permalink / raw)
To: emacs-devel
`default-directory' can be marked a safe file local variable if it
satisfies the stringp predicate.
Does this not allow failure in unsafe ways when (not file-exists-p) is
non-nil for same?
- what gives?
s_P
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: default-directory safe file local variable but no check for same if file-exists-p
2009-06-05 0:20 default-directory safe file local variable but no check for same if file-exists-p MON KEY
@ 2009-06-05 14:31 ` Stefan Monnier
2009-06-05 15:50 ` MON KEY
0 siblings, 1 reply; 4+ messages in thread
From: Stefan Monnier @ 2009-06-05 14:31 UTC (permalink / raw)
To: MON KEY; +Cc: emacs-devel
> Does this not allow failure in unsafe ways when (not file-exists-p) is
> non-nil for same?
It shouldn't. Even under normal circumstances, default-directory may
point to a non-existing directory (e.g. because it existed when the
buffer was created, but has been removed in the mean time).
Stefan
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: default-directory safe file local variable but no check for same if file-exists-p
2009-06-05 14:31 ` Stefan Monnier
@ 2009-06-05 15:50 ` MON KEY
2009-06-05 19:35 ` Davis Herring
0 siblings, 1 reply; 4+ messages in thread
From: MON KEY @ 2009-06-05 15:50 UTC (permalink / raw)
To: Stefan Monnier; +Cc: emacs-devel
On Fri, Jun 5, 2009 at 10:31 AM, Stefan Monnier<monnier@iro.umontreal.ca> wrote:
> It shouldn't. Even under normal circumstances, default-directory may
> point to a non-existing directory (e.g. because it existed when the
> buffer was created, but has been removed in the mean time).
Ok. Thank you. That makes sense.
I'm sure this is all very well thought out, and I apologize if this
comes across as foolish, but out of curiosity does this account for
procedures such as `process-file', `call-process', `start-process',
`start-file-process' etc. which base their file-handlers on the
`default-directory' value?
e.g. the default-directory doesn't exist at buffer creation, a
sub-process (synchronous or otherwise) comes along, attempts to take
residence in default directory, and not finding a 'there' there,
proceeds to build himself a new home.
s_P
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: default-directory safe file local variable but no check for same if file-exists-p
2009-06-05 15:50 ` MON KEY
@ 2009-06-05 19:35 ` Davis Herring
0 siblings, 0 replies; 4+ messages in thread
From: Davis Herring @ 2009-06-05 19:35 UTC (permalink / raw)
To: MON KEY; +Cc: Stefan Monnier, emacs-devel
> I'm sure this is all very well thought out, and I apologize if this
> comes across as foolish, but out of curiosity does this account for
> procedures such as `process-file', `call-process', `start-process',
> `start-file-process' etc. which base their file-handlers on the
> `default-directory' value?
My thought on this subject is that values of `default-directory' that
involve Tramp might be a problem, although I'm not sure how to exploit
being able to have someone SSH somewhere or become root on their own
machine.
Davis
--
This product is sold by volume, not by mass. If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2009-06-05 19:35 UTC | newest]
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2009-06-05 0:20 default-directory safe file local variable but no check for same if file-exists-p MON KEY
2009-06-05 14:31 ` Stefan Monnier
2009-06-05 15:50 ` MON KEY
2009-06-05 19:35 ` Davis Herring
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