[O] Bug: Tramp sudo links do not work when using short notation [9.1.9 (release_9.1.9-65-g5e4542 @ /home/guraltsev/.emacs.d/straight/build/org-plus-contrib/)]

[Gennady Uraltsev]

Hyperlinking to a file in an org-mode file using tramp does not work as
expected.  Consider this file:

******************

This link works
[[/sudo:root@localhost:/etc/hosts]]
this link doesn't
[[/sudo::/etc/hosts]]

*****************

The first one starts tramp as expected but the second version gives the
following errors:

File not found and directory write-protected
org-open-file: No match for fuzzy expression: /etc/hosts

Is this a bug or am I making a mistake of some kind.

Adding the ""file:"" header to the link does not help.





Emacs  : GNU Emacs 26.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.8)
 of 2019-04-12
Package: Org mode version 9.1.9 (release_9.1.9-65-g5e4542 @
/home/guraltsev/.emacs.d/straight/build/org-plus-contrib/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
org-src-mode-configure-edit-buffer)
 org-link-shell-confirm-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-mode-hook '(org-eldoc-load (lambda nil (org-bullets-mode 1))
                 #[0 "\300\301\302\303\304$\207" [add-hook 
change-major-mode-hook
org-show-all append local] 5]
                 #[0 "\300\301\302\303\304$\207" [add-hook 
change-major-mode-hook
org-babel-show-result-all append local] 5] org-babel-result-hide-spec
                 org-babel-hide-all-hashes)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3
"\n\n(fn ENTRY)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
org-babel-header-arg-expand)
 org-src-lang-modes '(("redis" . redis) ("php" . php) ("arduino" .
arduino) ("C" . c) ("C++" . c++) ("asymptote" . asy) ("bash" . sh)
("beamer" . latex)
                      ("calc" . fundamental) ("cpp" . c++) ("ditaa" . artist) 
("dot" .
fundamental) ("elisp" . emacs-lisp) ("ocaml" . tuareg)
                      ("screen" . shell-script) ("shell" . sh) ("sqlite" . sql))
 org-occur-hook '(org-first-headline-recenter)
 org-cycle-hook '(org-cycle-hide-archived-subtrees
org-cycle-show-empty-lines org-optimize-window-after-visibility-change)
 org-speed-command-hook '(org-speed-command-activate
org-babel-speed-command-activate)
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-open-link
:export org-attach-export-link :complete org-attach-complete-link)
                       ("id" :follow org-id-open) ("eww" :follow eww :store
org-eww-store-link)
                       ("rmail" :follow org-rmail-open :store 
org-rmail-store-link)
("mhe" :follow org-mhe-open :store org-mhe-store-link)
                       ("irc" :follow org-irc-visit :store org-irc-store-link 
:export
org-irc-export)
                       ("info" :follow org-info-open :export org-info-export 
:store
org-info-store-link)
                       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
                       ("docview" :follow org-docview-open :export 
org-docview-export
:store org-docview-store-link)
                       ("bibtex" :follow org-bibtex-open :store 
org-bibtex-store-link)
                       ("bbdb" :follow org-bbdb-open :export org-bbdb-export 
:complete
org-bbdb-complete-link :store org-bbdb-store-link)
                       ("w3m" :store org-w3m-store-link) ("bookmark-other-win" 
:follow
bookmark-jump-other-window :export nil)
                       ("bookmark" :follow bookmark-jump :export nil) 
("file+sys")
("file+emacs") ("shell" :follow org-link--open-shell)
                       ("news" :follow #[257 "\301\300\302Q!\207" ["news" 
browse-url
":"] 5 "\n\n(fn URL)"])
                       ("mailto" :follow #[257 "\301\300\302Q!\207" ["mailto"
browse-url ":"] 5 "\n\n(fn URL)"])
                       ("https" :follow #[257 "\301\300\302Q!\207" ["https" 
browse-url
":"] 5 "\n\n(fn URL)"])
                       ("http" :follow #[257 "\301\300\302Q!\207" ["http" 
browse-url
":"] 5 "\n\n(fn URL)"])
                       ("ftp" :follow #[257 "\301\300\302Q!\207" ["ftp" 
browse-url
":"] 5 "\n\n(fn URL)"]) ("help" :follow org-link--open-elisp)
                       ("file" :complete org-link-complete-file) ("elisp" 
:follow
org-link--open-elisp) ("doi" :follow org-link--open-doi))
 org-link-elisp-confirm-function 'yes-or-no-p
 org-attach-id-to-path-function 'org-attach-id-folder-format
 )