Re: tramp (2.4.3.27.1 nil/nil); error renaming to remote a file with spaces in name

[Francesco Potortì]

Michael,

thank you for the thourough explanation and the workaround

>Francesco Potortì <pot@gnu.org> writes:
>
>Hi Francesco,
>
>> The problem is that whenever I rename a local file whose name contains
>> spaces to a remote scp directory, the "file name" becomes "file\\ name"
>> on the remote, and tramp gives an error saying that it has not found
>> "file name" on remote.  Then, I need to rename "file\\ name" to
>> file name" on remote to get a sane name.  No problem renaming from remote to 
>> local.
>>
>> Emacs  : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d 
>> scroll bars)
>>  of 2021-11-27, modified by Debian
>> Package: tramp (2.4.3.27.1 nil/nil)
>
>I can reproduce the problem with Emacs 27.2 and 28.1. In Emacs 29.0.50
>(the development branch) it isn't reproducible.
>
>The reason is your local scp command, which belongs to the OpenSSH suite
>(I guess). Since OpenSSH 8.6 (?), it uses internally the SFTP protocol,
>instead of the SCP protocol. This has subtle changes for non-regular
>file names. Read the scp(1) man page about the -O command line
>argument. And read the OpenSSH Release Notes at
><https://www.openssh.com/releasenotes.html>.
>
>Tramp 2.6.0-pre (this is the version in Emacs 29) cares about. However,
>it is not ready for release yet, and backporting this special -O
>handling isn't trivial.
>
>In order to work around the problem, you might adapt the "scp" call in
>Tramp. Add the "-O" command line argument in the tramp-methods "scp"
>definition, parameter tramp-copy-args, like (untested)
>
>--8<---------------cut here---------------start------------->8---
> ("scp"
>  (tramp-login-program "ssh")
>  (tramp-login-args
>   (("-l" "%u") ("-p" "%p") ("%c") ("-e" "none") ("%h")))
>  (tramp-async-args (("-q")))
>  (tramp-remote-shell "/bin/sh")
>  (tramp-remote-shell-login ("-l"))
>  (tramp-remote-shell-args ("-c"))
>  (tramp-copy-program "scp")
>  (tramp-copy-args
>   (("-P" "%p") ("-p" "%k") ("-O") ("-q") ("-r") ("%c")))
>  (tramp-copy-keep-date t)
>  (tramp-copy-recursive t))
>--8<---------------cut here---------------end--------------->8---
>
>When Tramp 2.6 will be released, you might install it from GNU ELPA. It
>is backwards compatible to Emacs 27. Alternatively, you can use the
>recent Tramp from its git repo, of course.
>
>Best regards, Michael.
>