[BusyBox] Bug in busybox inetd

[Ritesh Banerjee]

Dear Richard
  here is the line which I use in my inetd.conf

telnet  stream  tcp nowait  root    /usr/sbin/telnetd

With the above line, it does not work where
      /usr/sbin/telnetd --> /bin/busbox

If I change this to "/bin/busybox telnetd" it works
fine.

If I make a symlink to a non-busybox application, like
   /tmp/ftpd --> /usr/sbin/ftpd,

and use "/tmp/ftpd" in place of "/usr/sbin/telnetd" it
works fine !

Regards
Ritesh


--- Richard Kojedzinszky <krichy at tvnetwork.hu> wrote:

> Dear Ritesh,
> 
> Please could you attach the excat line you use in
> busybox's inetd.conf?
> Just because I use busybox's telnetd in busybox's
> inetd, and it works
> fine, and of course, /usr/sbin/telnetd is a symlink
> to /bin/busybox.
> 
> Regards,
> Kojedzinszky Richard
> TvNetWork Rt.
> E-mail: krichy at tvnetwork.hu
> PGP: 0x24E79141
>   Fingerprint = 6847 ECFF EF58 0C09 18A5  16CF 270F
> 0C6F 24E7 9141
> 
> On Thu, 6 Jan 2005, Ritesh Banerjee wrote:
> 
> > Hi
> >    I was testing busybox inetd with telnetd, ftpd
> etc
> > and found a perplexing bug.
> >
> >    In the inetd.conf file, if I specify
> > "/usr/sbin/telnetd"  where it's a symlink to
> > "/bin/busybox", inetd is not able to allow telnet
> to
> > work. It listens on port 23 and when I use a
> client to
> > telnet into the machine, it forks itself and tries
> to
> > execv() but exits /fails before/after execv (if I
> put
> > some syslogs in the code, it reaches execv,
> otherwise
> > exits before that).
> >
> >   If in the inetd.conf file, I specify
> "/bin/busybox
> > telnetd", then telnet works fine !!
> >
> >   Now, if I use a symlink-ed executable that is
> not
> > part of busybox (I made /tmp/ftpd ->
> > /usr/sbin/telnetd), and I specify the symlink in
> inetd
> > (/tmp/ftpd in the example), this works fine !!!
> >
> >   Summary : busybox inetd is not able to invoke
> any
> > symlink-ed executable that is an applet in
> busybox!
> >
> >   Has someone faced this problem before ? Any
> clues ?
> >
> > Regards
> > Ritesh
> >
> >
> >
> > __________________________________
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> >
> >
> >
> 



		
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