rewinddir before telldir

[xavier Guerin]

Hi guys,

I fell on something strange in the implementation of the _seekdir function.

It appears that if you call _seekdir on a particular index without 
having called telldir beforehand, the _seekdir function returns (file 
telldir.c, line 138) without performing the seek operation. So far so 
good, since the index should have been returned by telldir.

However, it's exactly what happens when you use the rewinddir function. 
It's not unthinkable to parse a directory with readdir and then rewind 
it without calling telldir. It's why (I imagine) rewinddir calls 
_seekdir using the arbitrary value 0 as offset.

Wouldn't it be more correct to check for the loc value before returning 
(line 138), and in case of 0 call lseek (dir -> dd_fd, 0, 0) ?

Regards,
Xavier

-- 
Xavier Guérin - Doctoral student
TIMA Laboratory, SLS Group
46, av. Félix Viallet, 38000 GRENOBLE, FR
Mail : xavier.guerin@imag.fr
Phone : +33(0)4 76 57 47 59
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