Re: tramp hangs

[Mark Geary]

On Wed, 18 Sep 2019, Michael Albinus wrote:

> Mark Geary <address@hidden> writes:
>
> Hi Mark,
>
> > I'm trying to use tramp to edit a file on a Solaris 11 box.
>
> Uhh, Solaris is always problematic.
>
> > This worked until a year (very approximately) ago. I can't think of
> > anything that changed at the time it stopped working. I'm fairly
> > certain that the upgrade from Solaris 10 to 11 did not coincide with
> > the onset of the tramp problems.
> >
> > I run "emacs -q" and set tramp-verbose to 6
>
> That's good. But please always send Tramp traces as attachment. Mailers
> change line folding, and the traces become almost unreadable.
>
> > When I try to open .profile on sfmg10, I see this in the mini-buffer area:
> >
> > Tramp: Opening connection for sfmg10 using ssh...done
> > Tramp: Inserting '/ssh:sfmg10:/home/mag43/.profile'...failed
> >
> > Emacs then hangs. I interrupt it with C-g.
> > The tramp debug buffer follows:
>
> Here we find:
>
> > 17:09:23.769961 tramp-send-command (6) # ( (test -e
> > /home/mag43/.profile || test -h /home/mag43/.profile) && (env
> > QUOTING_STYLE=locale /usr/ccs/bin/stat -c '((/////%N/////) %h %u %g %X
> > %Y %Z %s /////%A///// t %i -1)' /home/mag43/.profile | sed -e
> > 's/"/\\"/g' -e 's/\/\/\/\/\//"/g') || echo nil) 2>/dev/null; echo
> > tramp_exit_status $?
>
>
> > 17:09:23.780967 tramp-wait-for-regexp (6) # bash: dev/null: No such
> > file or directory
> > tramp_exit_status 127
> > ///3ccb8c84d92d4fbbce6ab9a5367fc57b#$
>
> What's up with /dev/null on that remote host? Note, that Tramp has
> decided to use /usr/ccs/bin/bash there, for whatever reason.

Thanks for looking at this.

/usr/ccs/bin is a link to /usr/bin.

Looking more closely, I notice that the "/" before "dev" happens to be
the 256th character of that line. I'm sure that's no coincidence, but
I can't figure where the limit comes from or what, exactly, is being
limited.

If I open a new window and copy-paste lines from the invocation of
bash up to the one before this one (the readlink), then break this
line (after the "&&", for example) into two lines, the stat succeeds.

Alternately, if I put an empty string for the TERM type in the bash
invocation and leave out the "set +o emacs" further down ("set +o vi"
is ok) then I can paste the entire 292-character "stat" line and get
the proper output.

I am unsure of the best direction to proceed from here. Add one of the
above work-arounds in Tramp? (How?) Further digging to find the root cause?

Mark

--
Fifty-four Forty or Fight!

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