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bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to
From: |
Stefan Monnier |
Subject: |
bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely |
Date: |
Thu, 24 Oct 2013 20:59:06 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
>> Good point. The problem is the use of file-exists-p (which tests if
>> Elisp code can reach this file) instead of another function along the
>> lines of file-accessible-directory-p, which checks whether the file name
>> is reachable to C-level system primitives.
> Note that the predicate "file-accessible-directory-p" is also one of
I didn't mean to say that file-accessible-directory-p is the
right answer. Only that something *like it* should be used.
I.e. a function specifically meant to give you some idea about whether
that file is known to the OS primitives.
>> expand-file-name is not the right function, even if in some cases it may
>> happen to help.
> Why isn't it the right one?
> The function name describes it as "Convert filename NAME to absolute,
> and *canonicalize* it." (emphasis added)
You give too much meaning to "canonicalize": it does not imply that it's
the name used outside of Emacs. It just means to try and remove things
like "<something>/../foo/<somethingelse>".
So the output will be a "somewhat canonicalized Elisp file name".
Not necessarily an "OS-level file name". `cygwin-mount' happens to use
expand-file-name to convert the name from one form to another, basically
for pragmatic reasons: that's what exists and it is called often enough
that it works OK in practice.
> It seems that any proper Magic File handler should (by definition)
> hook into expand-file-name to provide an absolute canonicalized path,
Think of a magic file handler that provides access to members of a zip
or tar archive or think of file name handlers for Tramp.
These "canonical" file names still won't help you.
> Alternatively, how else would you recommend generally and portably
> canonicalizing a Magic file path?
You'd first have to define what kind of "canonicalizing" you want to do.
I think in the present case what you want is to turn an Elisp file name
into a file name understood by OS-level primitives (or nil if that
can't be done). We don't have such a function right now. So my
recommendation is to add such a function.
Stefan
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, (continued)
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Eli Zaretskii, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Ted Zlatanov, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Ted Zlatanov, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Ted Zlatanov, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Stefan Monnier, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely,
Stefan Monnier <=
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/25
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Stefan Monnier, 2013/10/25
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/29
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Eli Zaretskii, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Eli Zaretskii, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Eli Zaretskii, 2013/10/23
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, emacs, 2013/10/24
- bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, bug#15648: 24.2.50; gnutls SSL connection to IMAP server causes emacs to crash completely, Eli Zaretskii, 2013/10/25