Jack Repenning <jrepenning@collab.net> writes:
> At 9:37 AM +0200 9/12/03, Faller, Gyula wrote:
> > :)) MacOS 9, VMS (if I remember correctly), and even Unix.
> > Altough this latter means it is impossible to parse correctly a
> >Unix path in any way.
>
> Last time I looked, there was no way to get a "/" into a Unix file
> name, because there are no kernel APIs that accept "file names," only
> "paths," so the "/" always gets interpreted as a delimiter. I've
> heard tales of bugs, generally involving external storage devices,
> but those are bugs, they don't count.
I know that Subversion client/server doesn't run on Mac OS 9, and I
doubt that CVS server runs on Mac OS 9, so there shouldn't be a worry
WRT whatever Mac OS 9 may have chosen to use as a path delimiter.
There's a bit of sneakiness going on behind the scenes in Mac OS X to
deal with paths on HFS+. Take a look at
http://www.mit.edu/people/wsanchez/papers/USENIX_2000/
Here's an excerpt:
"Another obvious problem is the different path separators between
HFS+ (colon, ':') and UFS (slash, '/'). This also means that HFS+
file names may contain the slash character and not colons, while the
opposite is true for UFS file names. This was easy to address,
though it involves transforming strings back and forth. The HFS+
implementation in the kernel's VFS layer converts colon to slash and
vice versa when reading from and writing to the on-disk format. So
on disk the separator is a colon, but at the VFS layer (and
therefore anything above it and the kernel, such as libc) it's a
slash. However, the traditional Mac OS toolkits expect colons, so
above the BSD layer, the core Carbon toolkit does yet another
translation. The result is that Carbon applications see colons, and
everyone else sees slashes. This can create a user-visible
schizophrenia in the rare cases of file names containing colon
characters, which appear to Carbon applications as slash characters,
but to BSD programs and Cocoa applications as colons."
Go Fred!
-Fitz
--
Brian W. Fitzpatrick <fitz_at_red-bean.com> http://www.red-bean.com/fitz/
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Received on Sat Sep 13 02:43:08 2003