Re: [Monotone-devel] Monotone 0.16 bug with filesystems

[Jon Bright]

Florian Weimer wrote:
> If the limit does not exisit, _POSIX_PATH_MAX is probably undefined,
> too.  POSIX does not require an upper bound on the path length.

Does it also not require _POSIX_PATH_MAX to be defined?  If not, I guess 
some default value could be taken - 1024 or so.  The macros are supposed 
to be conservative, so I'd have guessed that even where there's no 
limit, the macro would still be defined.  But if there's no limit and no 
macro, taking an arbitrary limit seems like a better plan than throwing 
an exception.  That said, I've not looked at the boost code to see what 
it's doing with path_max - if it's assuming that this is the most memory 
it needs for all file names in the directory, it's broken anyway:

----------------
NOTES
        Files  with  name  lengths  longer than the value returned for
        name equal to _PC_NAME_MAX may exist in the given directory.

        Some returned values may be huge; they are not suitable for
        allocating memory.
----------------

--
Jon Bright
Silicon Circus Ltd.
http://www.siliconcircus.com