--- Begin Message ---
|
Subject: |
27.0.50; tramp fails to use ssh on LibreCMC (no base64 encoder available, and not mentioned in tramp manual) |
|
Date: |
Wed, 08 May 2019 13:25:19 -0300 |
Hello. I believe I have found a bug in either tramp.texi or
tramp-sh.el.
How to reproduce:
[1] set up a vanilla installation of LibreCMC (or OpenWRT, I've
reproduced this on both) on a wireless router. Suppose it's IP
it's 192.168.1.1.
[2] ssh into the router as root and create a file,
cat > test
whatever
^D
[3] from another machine, fire up emacs,
emacs -Q
[4] try to use tramp to access the file using ssh:
C-x X-f /ssh:root@192.168.1.1:/root/test
(or using the IP address, or host name, of the router, whatever it is)
Emacs will respond with an error, complaining about a "wrong method".
This is because line 3174 of rtamp.el was reached. It is the default
case of a COND expression that has other two cases:
- (or (tramp-local-host-p v)
(tramp-method-out-of-band-p v size))
- (rem-enc ...)
The rem-enc function should use a base64 encoding program on the
router (but LibreCMC and OpenWRT do not have it!).
If, on the router, I install base64:
# opkg install coreutils-base64
then tramp succeeds.
So, I believe this should be mentioned in the manual
(in the info node Configuration -> Remote Programs
there is a list of required programs, but neither uuencode nor
base64 are mentioned)
I'm willing to send a patch to the manual - however:
reading lisp/net/tramp-sh.el I get the impression that tramp
actually *should* be able to encode/decode using busybox/awk,
which *is* available in LibreCMC (or did I get it wrong?).
So, I'm not sure if this is a tramp bug (can't use awk to encode/decode
files in base64 format) or bug in its manual (doesn't mention that
a base64 binary is needed on the remote side).
Thank you!
J.
In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.5)
of 2019-05-08 built on mitra
Repository revision: 8b789755b45e6e10ed2809d7a7b89146b28452fc
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description: Debian GNU/Linux buster/sid
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS GLIB NOTIFY
INOTIFY LIBSELINUX GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS
GTK3 X11 XDBE XIM THREADS LIBSYSTEMD JSON PDUMPER LCMS2 GMP
Important settings:
value of $LC_CTYPE: en_US.UTF-8
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Fundamental
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv
bytecomp byte-compile cconv dired dired-loaddefs format-spec rfc822 mml
easymenu mml-sec password-cache epa derived epg epg-config gnus-util
rmail rmail-loaddefs text-property-search mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
time-date elec-pair mule-util tooltip eldoc electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core term/tty-colors frame cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)
Memory information:
((conses 16 46847 6151)
(symbols 48 5968 1)
(strings 32 15091 1308)
(string-bytes 1 495765)
(vectors 16 9664)
(vector-slots 8 118994 8860)
(floats 8 17 21)
(intervals 56 187 0)
(buffers 992 13))
--- End Message ---
--- Begin Message ---
|
Subject: |
Re: bug#35639: 27.0.50; tramp fails to use ssh on LibreCMC (no base64 encoder available, and not mentioned in tramp manual) |
|
Date: |
Thu, 16 Jan 2020 21:23:14 +0100 |
|
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Version: 27.2
Jeronimo Pellegrini <address@hidden> writes:
> Hello!
Hi Jeronimo,
>> >> I've committed the appended patch to the Emacs and Tramp git
>> >> repositories. Could you, pls, test with your LibeCMC machine?
>
> I just tested it with the exact same precedure that I used when I reported
> the bug, and it worked perfectly!
Thanks for the feedback.
>> >> If you don't use the git repositories, you might install Tramp 2.4.3
>> >> from GNU ELPA, and apply the patch on top of it.
>
> I compiled Emacs from git (updated today, Jan 16)...
>
> So I believe this is solved! :-)
Yep. I'm closing the bug.
> J.
Best regards, Michael.
--- End Message ---