Re: [ECOS] Questions about maximum length of file name of eCos RAM file system

[Sergei Gavrikov <sergei dot gavrikov at gmail dot com>]

On Thu, 25 Feb 2010, Øyvind Harboe wrote about
http://ecos.sourceware.org/ml/ecos-discuss/2010-01/msg00048.html

> I don't think there is a filename limit in ramfs as such.

Hello Øyvind,

It seems I found such a limit in ramsf.c:find_entry():

@@ -1339,7 +1356,7 @@ static int find_entry( ramfs_dirsearch *
     ramfs_node *dir = ds->dir;
     const char *name = ds->path;
     const char *n = name;
-    char namelen = 0;
+    int namelen = 0;

Then ds->namelen will be negative for the filenames with its length
grater than 2^7. GDB showed me that.

> Perhaps you are running into the bug I found.
>
> Try this patch:
>
> http://sourceware.org/ml/ecos-patches/2010-02/msg00017.html
>
> --
> Øyvind Harboe

Øyvind, I tried your patch without the above and `ramfs1' test did
hang in a place if I set up that `LONGNAME1' value, for example, as
[sring repeat "1" 128], by other hand, call of stat(), read() fails
for the "long" filenames without your patch (at the least on syntetic
target). So, the both tweaks solve the issue.


Sergei
--

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss