[BusyBox] [ANNOUNCE] utelnetd-0.1.1
rich_wilson at agilent.com
rich_wilson at agilent.com
Mon May 20 17:56:04 UTC 2002
Executive summary: utelnetd-0.1.1 succesfully used with uClibc (ppc).
Glenn,
Thanks for your feedback. I finally figured out my problems this
morning. It turns out that when I re-made my kernel, it wasn't
actually recompiling the pty code. (it has to do with the fact
that the kernel source is kept under ClearCase, which can't do
a touch of a checked-in file. Thus, the make dependencies
are broken)
Once I did a "make clean zImage.initrd", things started making
sense. Even better yet, it's working. With uClibc, no less.
The utelnetd source which Robert Schwebel advertized needs a couple
patches to turn off DEBUG. I have notified him.
Rich
Rich Wilson
Agilent Technologies
425-335-2245
rich_wilson at agilent.com
> -----Original Message-----
> From: Glenn R Heard Jr [mailto:rayzer at zoominternet.net]
> Sent: Monday, May 20, 2002 3:03 PM
> To: busybox at busybox.net
> Subject: Re: [BusyBox] [ANNOUNCE] utelnetd-0.1.1
>
>
> Rich,
> Take a look at this excerpt from the telnetd I use:
>
> getpty(char *line)
> {
> int p;
> #ifdef HAVE_DEVPTS_FS
> p = open("/dev/ptmx", 2);
> if (p > 0) {
> grantpt(p);
> unlockpt(p);
> strcpy(line, ptsname(p));
> return(p);
> }
> #else
>
> I had to define the HAVE_DEVPTS_FS by hand before it would work.
>
> From the look of the IAC debug output you sent, I would swear
> we are using
> very similar source code. Also, the fact the the fork'd
> telnetd immediately
> becomes a zombie clinches my belief that both the bb applet I
> use and the
> utelnetd your using are based on the same exact code.
>
> Lastly, I will assume that your kernel has DEVFS support... (
> just mentioned
> it for completeness )
>
> Just trying to help anyway I can...
>
> Glenn Ray"zer" Heard rayzer at zoominternet.net
> Software Engineer gheard at altronicinc.com
> Altronic Inc. http://www.altronicinc.com/
> ICQ: 123194600 www.zoominternet.net/~rayzer
> ---
> 'First things first -- but not necessarily in that order' -- Dr Who
>
> > -----Original Message-----
> > From: WILSON,RICH (A-LakeStevens,ex1)
> [mailto:rich_wilson at agilent.com]
> > Sent: Wednesday, May 15, 2002 4:54 PM
> > To: Glenn Heard; busybox at busybox.net
> > Subject: RE: [BusyBox] [ANNOUNCE] utelnetd-0.1.1
> >
> >
> > [stupid outlook. where did my compose window go to? you
> > might have seen
> > a very similar message very recently]
> >
> > > ... and made sure that
> > > /dev/pts was mounted.
> >
> > Oh, I forgot to do the mount!
> >
> > # mount -t devpts none /dev/pts
> > # mount
> > /dev/root on / type ext2 (rw)
> > none on /proc type proc (rw)
> > /dev/mtdblock0 on /flash type jffs2 (rw)
> > none on /dev/pts type devpts (rw)
> > # utelnetd -d
> > telnetd: starting
> > port: 23; login program: /bin/sh
> > daemonizing
> > # getpty(): got pty /dev/pts/0
> > Ignoring IAC 0xff, DO, SUPPRESS GO AHEAD
> > Ignoring IAC 0xff, WILL, TERMINAL TYPE
> > Ignoring IAC 0xff, WONT, ECHO
> > Ignoring IAC 0xff, WONT, LFLOW
> > Ignoring IAC 0xff, DO, ECHO
> >
> >
> > Oh well, didn't make any difference.
> > I'll try devfs when I get some free time...
> > Thanks for the hint.
> >
> > Rich
> >
> > Rich Wilson
> > Agilent Technologies
> > 425-335-2245
> > rich_wilson at agilent.com
> >
> > > -----Original Message-----
> > > From: Glenn Heard [mailto:GHeard at AltronicInc.com]
> > > Sent: Wednesday, May 15, 2002 1:33 PM
> > > To: busybox at busybox.net
> > > Subject: RE: [BusyBox] [ANNOUNCE] utelnetd-0.1.1
> > >
> > >
> > > Hello,
> > >
> > > I had the same problem on my bb system when I was
> > > trying to use the telnetd patch with /dev/ptyxx. Mine worked
> > > a lot better when I defined a devfs system and made sure that
> > > /dev/pts was mounted. This worked, so I went away happy
> > > without having to know why the old /dev/ptyxx method didn't work.
> > >
> > > Glenn Heard rayzer at zoominternet.net
> > > Software Engineer gheard at altronicinc.com
> > > Altronic Inc. www.altronicinc.com
> > > ICQ: 123194600 www.zoominternet.net/~rayzer
> > > ---
> > > 'hAS ANYONE SEEN MY cAPSLOCK KEY?'
> > >
> > > > -----Original Message-----
> > > > From: WILSON,RICH (A-LakeStevens,ex1)
> > > [mailto:rich_wilson at agilent.com]
> > > > Sent: Wednesday, May 15, 2002 4:12 PM
> > > > To: 'Robert Schwebel'; busybox at busybox.net
> > > > Subject: RE: [BusyBox] [ANNOUNCE] utelnetd-0.1.1
> > > >
> > > >
> > > > I thought I'd try this out on my system, and I'm having
> > > some trouble.
> > > >
> > > > What I did:
> > > >
> > > > Used uClibc
> > > > Replaced the login program with "/bin/sh"
> > > > Cross-compiled for PPC
> > > >
> > > > What happened:
> > > > Client is happy, echos characters, but shows no sign of
> > > > any response
> > > > On the server:
> > > >
> > > > # utelnetd -d
> > > > telnetd: starting
> > > > port: 23; login program: /bin/sh
> > > > daemonizing
> > > > #
> > > >
> > > > And then, when it gets a connection,
> > > >
> > > > getpty(): got pty /dev/pts/0
> > > > Ignoring IAC 0xff, DO, SUPPRESS GO AHEAD
> > > > Ignoring IAC 0xff, WILL, TERMINAL TYPE
> > > > Ignoring IAC 0xff, WONT, ECHO
> > > > Ignoring IAC 0xff, WONT, LFLOW
> > > > Ignoring IAC 0xff, DO, ECHO
> > > >
> > > > ps looks like
> > > >
> > > > # ps
> > > > PID Uid VmSize Stat Command
> > > > 1 0 668 S init
> > > > 2 0 S [keventd]
> > > > 3 0 S [ksoftirqd_CPU0]
> > > > 4 0 S [kswapd]
> > > > 5 0 S [bdflush]
> > > > 6 0 S [kupdated]
> > > > 7 0 S [mtdblockd]
> > > > 15 0 S [jffs2_gcd_mtd0]
> > > > 75 0 688 S /bin/sh -i -s
> > > > 85 0 412 S utelnetd -d
> > > > 88 0 Z [utelnetd]
> > > > 89 0 668 R ps
> > > > #
> > > >
> > > > Doing "killall utelnetd", the client notices and exits.
> > > >
> > > > Any ideas? I don't have time to go into debug mode at
> the moment.
> > > >
> > > > Rich
> > > >
> > > > Rich Wilson
> > > > Agilent Technologies
> > > > 425-335-2245
> > > > rich_wilson at agilent.com
> > > >
> > > > > -----Original Message-----
> > > > > From: Robert Schwebel [mailto:robert at schwebel.de]
> > > > > Sent: Wednesday, May 15, 2002 12:10 AM
> > > > > To: busybox at busybox.net
> > > > > Subject: [BusyBox] [ANNOUNCE] utelnetd-0.1.1
> > > > >
> > > > >
> > > > > Hi,
> > > > >
> > > > > I have been searching for a standalone telnet daemon for
> > > > > quite a long time
> > > > > yet, but didn't find something reasonable so far. Some time
> > > > ago, Jörg
> > > > > Schmitz-Linneweber has posted a busybox applet on this list,
> > > > > but due to
> > > > > security reasons it seems to be a bad idea to have telnetd
> > > > > integrated into
> > > > > BB. So I have now taken Jörg's applet and made it standalone,
> > > > > with some
> > > > > additions:
> > > > >
> > > > > http://www.pengutronix.de/software/utelnetd_en.html
> > > > >
> > > > > - Works standalone, so can be easily taken away on production
> > > > > machines
> > > > > - No problems with first login, <ctrl-c> character
> > > > > - Works with normal /dev and /devfs (for ptys)
> > > > > - Not tested with uClibc yet
> > > > >
> > > > > Thanks to Bjorn Wesen, Vladimir Oleynik and Joerg
> > > > > Schmitz-Linneweber for
> > > > > the code!
> > > > >
> > > > > Any help, ideas and patches are welcome.
> > > > >
> > > > > Robert
> > > > > --
> > > > > +--------------------------------------------------------+
> > > > > | Dipl.-Ing. Robert Schwebel | http://www.pengutronix.de |
> > > > > | Pengutronix - Linux Solutions for Science and Industry |
> > > > > | Braunschweiger Str. 79, 31134 Hildesheim, Germany |
> > > > > | Phone: +49-5121-28619-0 | Fax: +49-5121-28619-4 |
> > > > > +--------------------------------------------------------+
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>
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