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+;;; +finger.el --- Finger bugfix -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; `net-utils' defines `finger', which purportedly consults
+;; `finger-X.500-host-regexps' to determine what hosts to only send a username
+;; to.  I've found that that is not the case, and so I've patched it.  At some
+;; point I'll submit this to Emacs itself.
+
+;;; Code:
+
+(require 'net-utils)                    ; this requires everything else I'll need.
+(require 'seq)
+
+(defun finger (user host)
+  "Finger USER on HOST.
+This command uses `finger-X.500-host-regexps'
+and `network-connection-service-alist', which see."
+  ;; One of those great interactive statements that's actually
+  ;; longer than the function call! The idea is that if the user
+  ;; uses a string like "pbreton@cs.umb.edu", we won't ask for the
+  ;; host name. If we don't see an "@", we'll prompt for the host.
+  (interactive
+   (let* ((answer (read-from-minibuffer "Finger User: "
+                                        (net-utils-url-at-point)))
+          (index  (string-match (regexp-quote "@") answer)))
+     (if index
+         (list (substring answer 0 index)
+               (substring answer (1+ index)))
+       (list answer
+             (read-from-minibuffer "At Host: "
+                                   (net-utils-machine-at-point))))))
+  (let* ((user-and-host (concat user "@" host))
+         (process-name (concat "Finger [" user-and-host "]"))
+         (regexps finger-X.500-host-regexps)
+         ) ;; found
+    (when (seq-some (lambda (r) (string-match-p r host)) regexps)
+      (setq user-and-host user))
+    (run-network-program
+     process-name
+     host
+     (cdr (assoc 'finger network-connection-service-alist))
+     user-and-host)))
+
+(provide '+finger)
+;;; +finger.el ends here