Add command 'dbus-monitor'

* doc/misc/dbus.texi: (Monitoring Messages): Document 'dbus-monitor'.

* etc/NEWS: Mention 'dbus-monitor' but 'dbus-register-monitor'.
Fix typos and other oddities.

* lisp/net/dbus.el (dbus-monitor): New command.

* test/lisp/net/dbus-tests.el (dbus--test-register-service): Extend test.

doc/misc/dbus.texi

@@ -2151,6 +2151,11 @@ And this form restricts the monitoring on D-Bus errors:
 @end lisp
 @end defun
 
+@deffn Command dbus-monitor &optional bus
+This command invokes @code{dbus-register-monitor} interactively, and
+switches to the monitor buffer.
+@end deffn
+
 
 @node Index
 @unnumbered Index

etc/NEWS

@@ -85,7 +85,7 @@ useful on systems such as FreeBSD which ships only with "etc/termcap".
 
 * Changes in Emacs 28.1
 
-** The new NonGNU ELPA archive is enabled by default alongside GNU ELPA
+** The new NonGNU ELPA archive is enabled by default alongside GNU ELPA.
 
 ** Minibuffer scrolling is now conservative by default.
 This is controlled by the new variable 'scroll-minibuffer-conservatively'.
@@ -221,10 +221,10 @@ It is not enabled by default.
 
 +++
 ** Modifiers now go outside angle brackets in pretty-printed key bindings.
-For example, <return> with Control and Meta modifiers is now shown as
-C-M-<return> instead of <C-M-return>.  Either variant can be used as
-input; functions such as 'kbd' and 'read-kbd-macro' accept both styles
-as equivalent (they have done so for a long time).
+For example, 'RET' with Control and Meta modifiers is now shown as
+'C-M-<return>' instead of '<C-M-return>'.  Either variant can be used
+as input; functions such as 'kbd' and 'read-kbd-macro' accept both
+styles as equivalent (they have done so for a long time).
 
 +++
 ** New user option 'lazy-highlight-no-delay-length'.
@@ -257,7 +257,7 @@ forms, but this command has now been changed to work more like
 When 'M-y' is typed not after a yank command, it activates the minibuffer
 where you can browse previous kills using the minibuffer history or
 completion.  In Isearch, you can bind 'C-s M-y' to the command
-`isearch-yank-pop' that uses the minibuffer with completion on
+'isearch-yank-pop' that uses the minibuffer with completion on
 previous kills to read a string and append it to the search string.
 
 ---
@@ -341,9 +341,10 @@ It used to be enabled when Emacs is started in GUI mode but not when started
 in text mode.  The cursor still only actually blinks in GUI frames.
 
 ** pcase
+
 +++
-*** The `pred` pattern can now take the form (pred (not FUN)).
-This is like (pred (lambda (x) (not (FUN x)))) but results
+*** The 'pred' pattern can now take the form '(pred (not FUN))'.
+This is like '(pred (lambda (x) (not (FUN x))))' but results
 in better code.
 
 +++
@@ -403,7 +404,7 @@ disabled entirely.
 ** Windows
 
 +++
-*** New 'display-buffer' function 'display-buffer-use-least-recent-window'
+*** New 'display-buffer' function 'display-buffer-use-least-recent-window'.
 This is like 'display-buffer-use-some-window', but won't reuse the
 current window, and when called repeatedly will try not to reuse a
 previously selected window.
@@ -736,7 +737,7 @@ not.
 
 ---
 *** Respect 'message-forward-ignored-headers' more.
-Previously, this variable would not be consulted if
+Previously, this user option would not be consulted if
 'message-forward-show-mml' was nil and forwarding as MIME.
 
 +++
@@ -857,7 +858,7 @@ deprecated.  Errors in the Inscript method were corrected.
 
 ---
 *** New input method 'cham'.
-There's also a Cham greeting in 'etc/HELLO'.
+There's also a Cham greeting in "etc/HELLO".
 
 ** Ispell
 
@@ -1395,13 +1396,13 @@ have been renamed to have "proper" public names and documented
 'xref-show-definitions-buffer-at-bottom').
 
 *** New command 'xref-quit-and-pop-marker-stack' and a binding for it
-in Xref buffers ('M-,'). This combination is easy to press
+in "*xref*" buffers ('M-,'). This combination is easy to press
 semi-accidentally if the user wants to go back in the middle of
 choosing the exact definition to go to, and this should do TRT.
 
 ---
-*** New value 'project-relative' for 'xref-file-name-display'
-If chosen, file names in *xref* buffers will be displayed relative
+*** New value 'project-relative' for 'xref-file-name-display'.
+If chosen, file names in "*xref*" buffers will be displayed relative
 to the 'project-root' of the current project, when available.
 
 ** json.el
@@ -1424,9 +1425,9 @@ https://www.w3.org/TR/xml/#charsets).  Now it rejects such strings.
 
 ---
 *** erc-services.el now supports NickServ passwords from auth-source.
-The 'erc-use-auth-source-for-nickserv-password' variable enables querying
-auth-source for NickServ passwords.  To enable this, add the following
-to your init file:
+The 'erc-use-auth-source-for-nickserv-password' user option enables
+querying auth-source for NickServ passwords.  To enable this, add the
+following to your init file:
 
     (setq erc-prompt-for-nickserv-password nil
           erc-use-auth-source-for-nickserv-password t)
@@ -1591,18 +1592,18 @@ that makes it a valid button.
 'string-clean-whitespace', 'string-fill', 'string-limit',
 'string-lines', 'string-pad' and 'string-chop-newline'.
 
-*** New macro `named-let` that provides Scheme's "named let" looping construct
+*** New macro 'named-let' that provides Scheme's "named let" looping construct.
 
 ** thingatpt
 
 +++
 *** New variable 'thing-at-point-provider-alist'.
-This allows mode-specific alterations to how `thing-at-point' works.
+This allows mode-specific alterations to how 'thing-at-point' works.
 
 ** Miscellaneous
 
 +++
-*** New command `C-x C-k Q' to force redisplay in keyboard macros.
+*** New command 'C-x C-k Q' to force redisplay in keyboard macros.
 
 ---
 *** New user option 'remember-diary-regexp'.
@@ -1616,8 +1617,8 @@ This function returns some statistics about the line lengths in a buffer.
 +++
 *** New variable 'inhibit-interaction' to make user prompts signal an error.
 If this is bound to something non-nil, functions like
-`read-from-minibuffer', `read-char' (and related) will signal an
-`inhibited-interaction' error.
+'read-from-minibuffer', 'read-char' (and related) will signal an
+'inhibited-interaction' error.
 
 ---
 *** 'process-attributes' now works under OpenBSD, too.
@@ -1888,14 +1889,12 @@ Otherwise, it will use 'xwidget-webkit-last-session'.
 
 +++
 *** New user options to customize Flymake's mode-line.
-
-The new customization variable 'flymake-mode-line-format' is a mix of
-strings and symbols like 'flymake-mode-line-title' ,
-'flymake-mode-line-exception' and 'flymake-mode-line-counters'.  The
-new customization variable 'flymake-mode-line-counter-format' is a mix
-of strings and symbols like 'flymake-mode-line-error-counter',
-'flymake-mode-line-warning-counter' and
-'flymake-mode-line-note-counter'.
+The new user option 'flymake-mode-line-format' is a mix of strings and
+symbols like 'flymake-mode-line-title', 'flymake-mode-line-exception'
+and 'flymake-mode-line-counters'.  The new user option
+'flymake-mode-line-counter-format' is a mix of strings and symbols
+like 'flymake-mode-line-error-counter',
+'flymake-mode-line-warning-counter' and 'flymake-mode-line-note-counter'.
 
 ** Flyspell mode
 
@@ -1954,7 +1953,7 @@ type symbols.  Both functions propagate D-Bus errors.
 messages, contain the error name of that message now.
 
 +++
-*** D-Bus messages can be monitored with new function 'dbus-register-monitor'.
+*** D-Bus messages can be monitored with the new command 'dbus-monitor'.
 
 +++
 *** D-Bus events have changed their internal structure.
@@ -2178,13 +2177,13 @@ ledit.el, lmenu.el, lucid.el and old-whitespace.el.
 'vcursor-toggle-vcursor-map', 'w32-focus-frame', 'w32-select-font',
 'wisent-lex-make-token-table'.
 
-** The 'when' argument of `make-obsolete` and related functions is mandatory.
-The use of those functions without a 'when' argument was marked
-obsolete back in Emacs-23.1.  The affected functions are:
-make-obsolete, define-obsolete-function-alias, make-obsolete-variable,
-define-obsolete-variable-alias.
+** The WHEN argument of 'make-obsolete' and related functions is mandatory.
+The use of those functions without a WHEN argument was marked obsolete
+back in Emacs 23.1.  The affected functions are: 'make-obsolete',
+'define-obsolete-function-alias', 'make-obsolete-variable',
+'define-obsolete-variable-alias'.
 
-** The variable 'keyboard-type' is obsolete and not dynamically scoped any more
+** The variable 'keyboard-type' is obsolete and not dynamically scoped any more.
 
 
 * Lisp Changes in Emacs 28.1

lisp/net/dbus.el

@@ -2171,6 +2171,23 @@ has been handled by this function."
       (when eobp
         (goto-char (point-max))))))
 
+;;;###autoload
+(defun dbus-monitor (&optional bus)
+  "Invoke `dbus-register-monitor' interactively, and switch to the buffer.
+BUS is either a Lisp keyword, `:system' or `:session', or a
+string denoting the bus address.  The value nil defaults to `:session'."
+  (interactive
+   (list
+    (let ((input
+           (completing-read
+            (format-prompt "Enter bus symbol or name" :session)
+            '(:system :session) nil nil nil nil :session)))
+      (if (and (stringp input)
+               (string-match-p "^\\(:session\\|:system\\)$" input))
+          (intern input) input))))
+  (dbus-register-monitor (or bus :session))
+  (switch-to-buffer (get-buffer-create "*D-Bus Monitor*")))
+
 (defun dbus-handle-bus-disconnect ()
   "React to a bus disconnection.
 BUS is the bus that disconnected.  This routine unregisters all

test/lisp/net/dbus-tests.el

@@ -465,6 +465,14 @@
   (should (eq (dbus-unregister-service bus dbus--test-service) :non-existent))
   (should-not (member dbus--test-service (dbus-list-known-names bus)))
 
+  ;; A service name is a string, constructed of at least two words
+  ;; separated by ".".
+  (should
+   (equal
+    (butlast
+     (should-error (dbus-register-service bus "s")))
+    `(dbus-error ,dbus-error-invalid-args)))
+
   ;; `dbus-service-dbus' is reserved for the BUS itself.
   (should
    (equal