[scponly] Re: scponly bug

[joe]

Zdenek,

Thanks for emailing me.  I am hoping I can ask you some more questions
about the problems you mention.  see questions inline...

On Mon, 16 Sep 2002, Zdenek Hladik wrote:
> Hello,
>
> I just tried to test your SCPONLY package. It seems to by little
> messy package. It seems that 3.1 pakage nobody tested on Linux. make
> jail ends with crazy error. But it is not big problem because chroot
> for making jail is on Internet lot of other cookbooks.

Could you send me this error?

> But more serious problem i got. At first I believed that i made wrong
> chroot jail, but after adding some debug messages to scponly.c i
> found that scponlyc crashes inside
>
>        flatten_vector()
>
> on processing of scp -r -p -d "somefile" command from winscp. with
> exit signal 11 (memory violation).

If possible, could you increase your debugging output (edit
/usr/local/etc/scponly/debugfile andchange value inside the file to "2")
and rerun your winscp program to cause the crash.  It would be very
valuable if i could see the debugging output.

> Because I did not understand purposes of flattening i simply used
> "request" variable instead of flatted_request" and it started to
> work.

flatten_vector() takes an argument vector (like char **argv) and changes
it into a regular C string (char *).  it does this by placing a
single space between each argument in the argument vector.   i will audit
this code and try to find the problem.

> So, please check your flatten_vector() routine - somewhere must be
> problem, probably with pointers. (as very commoin in C language)
>
> Even with those problems I believe that it is very valuable package
> and I hope also that Openssh authors incoproprate supporting features
>  to future versions of package. So much thans for your work...
>
> bye
>                                     Zdenek Hladik
>                                          I M A
>
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