On Mon, 12 Sep 2005 22:04:25, Rainer Brockerhoff <email@hidden>
wrote:
> At 16:01 -0400 9/12/05, Laurence Harris wrote:
>> On 9/12/05 11:57 AM, Rainer Brockerhoff didst favor us with:
>>> As I have similar motives for examining symlinks before resolving them (if
>>> at
>>> all), I'm playing it safe by always descending through the path components
>>> with FSMakeFSRefUnicode. I avoid using CFURL entirely. This also works
>>> around
>>> the 1024-character path size limit, of course.
>>
>> I avoid CFURLs as much as possible myself. I was using them here to create a
>> path for use with symlink(). But as long as we're at it, is there another
>> way to create symlinks that uses the File Manager and hence doesn't suffer
>> from the path length limitation?
>
> Well, in general I found that if you need to use a BSD call (like, say
> lstat()) it pays to walk down the path components by calling chdir(). If you
> need File Manager calls, walk down calling FSMakeFSRefUnicode. This is the
> only way to get around the limit.
>
> However, symlink() takes two different paths, so some magic would be necessary
> here; something like creating the symlink in a known "short path" location
> like /tmp, getting a FSRef for it, and then moving it to the destination, or
> swapping it with FSExchangeObjects().
What a hack :)
> Another idea would be to create the link yourself as a file of type/creator
> 'slnk'/'rhap' (kSymLinkFileType/ kSymLinkFileCreator), containing the target
> path. You must also set the file type in the fileMode field of the permissions
> to S_IFLNK. This should work, although I haven't tried it myself. These
> details are in TN1150.
That would be dependence on HFS+.
BTW, "For maximum compatibility, the length of the path should be 1024 bytes
or less." Paths limitations strike again.
Mike
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