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Re: sftp
Corinna Vinschen schrieb:
>
> On Thu, Apr 05, 2001 at 02:04:16PM +0200, Ronald Hecht wrote:
> >
> >
> > Corinna Vinschen schrieb:
> > >
> > > On Wed, Apr 04, 2001 at 07:01:07PM +0200, Ronald Hecht wrote:
> > > > Hi,
> > > >
> > > > i called sftp with -v -v -v and got
> > > >
> > > > sftp> ls
> > > > debug3: Sending SSH2_FXP_READDIR I:3
> > > > debug3: Received reply T:104 I:3
> > > > debug3: Received 38 SSH2_FXP_NAME responses
> > > > d--------- 21 administ Domänen- 8192 Apr 16:55 .
> > > > drwxrwxrwx 5 administ Domänen- 0 Jan 09:06 ..
> > > > drwxrwxrwx 2 administ Domänen- 0 Apr 13:38 .autosave
> > > > -rwx------ 1 hr55 Domänen- 767 Mar 07:42 .bashrc
> > > > ....
> > > > debug3: Sending SSH2_FXP_READDIR I:4
> > > >
> > > > and now it hangs. Seems to me, that the sftp-server did not respond to
> > > > the second SSH2_FXP_READDIR.
> > >
> > > This doesn't help, unfortunately. The connection is made, the
> > > sftp-server (you are using the one I sent yesterday, aren't you?)
> > > is up and running.
> > >
> > > The problem is that I can't reproduce the problem. I have tried
> > > both, RSA and Password authentication, both a local connection
> > > and from a Linux box and with ash, bash and tcsh as login shell.
> > > Either way sftp works as expected.
> > >
> > > We need somebody to seriously debug that problem.
> > >
> >
> > I would do that, but I don't really know how to debug a service or
> > deamon. I've tried with syslog using TRACE (see my last mail), but this
> > isn't really what I understand of debugging, isn't it? Can you or anyone
> > else help me?
>
> Did you try to reproduce that behaviour when starting sshd from
> the command line using `sshd -d'? If that works, you can start
> sshd from strace:
>
> strace -o sshd.strace.out -f C:/cygwin/usr/sbin/sshd -d
>
> and looking through the strace output.
>
> Another chance is to connect to your hanging sftp-server using
> gdb. When the program hangs, call `ps' to get the Windows PID
> of sftp-server and call
>
> gdb -nw /usr/sbin/sshd WINPID
>
> Then you can get switch to thread 1
>
> thread 1
>
> and print a stacktrace
>
> bt
>
> which could help.
>
That's what I got with gdb:
(gdb) cont
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x77f7754b in ?? ()
(gdb) bt
#0 0x77f7754b in ?? ()
#1 0x77f0c51a in ?? ()
#2 0x61005755 in _size_of_stack_reserve__ ()
#3 0x40298b in process_readdir () at sftp-server.c:773
#4 0x403485 in process () at sftp-server.c:997
#5 0x4037d2 in main (ac=1, av=0x1a035a18) at sftp-server.c:1104
#6 0x61003cea in _size_of_stack_reserve__ ()
#7 0x61003f95 in _size_of_stack_reserve__ ()
#8 0x61003fe4 in _size_of_stack_reserve__ ()
#9 0x40c873 in cygwin_crt0 ()
Ronald
> Corinna
>
> --
> Corinna Vinschen Please, send mails regarding Cygwin to
> Cygwin Developer mailto:cygwin@cygwin.com
> Red Hat, Inc.
>
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