(server-running-p): New function.

2 files changed, 21 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d75995a3b54..a00191735fd 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,7 @@
+2007-09-19  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * server.el (server-running-p): New function.
+
 2007-09-18  Jason Rumney  <jasonr@gnu.org>
 
         * term/w32-win.el (w32-focus-frame): Make obsolete alias for
diff --git a/lisp/server.el b/lisp/server.el
index 5c44986bb2c..f22d693ffaa 100644
--- a/lisp/server.el
+++ b/lisp/server.el
@@ -391,7 +391,8 @@ message."
     (server-log (format "server-handle-suspend-tty, terminal %s" terminal) proc)
     (condition-case err
         (server-send-string proc "-suspend \n")
-      (file-error (ignore-errors (server-delete-client proc))))))
+      (file-error                       ;The pipe/socket was closed.
+       (ignore-errors (server-delete-client proc))))))
 
 (defun server-unquote-arg (arg)
   "Remove &-quotation from ARG.
@@ -526,6 +527,21 @@ kill any existing server communications subprocess."
                         " " (int-to-string (emacs-pid))
                         "\n" auth-key)))))))))
 
+(defun server-running-p (&optional name)
+  "Test whether server NAME is running."
+  (interactive
+   (list (if current-prefix-arg
+             (read-string "Server name: " nil nil server-name))))
+  (unless name (setq name server-name))
+  (condition-case nil
+      (progn
+        (delete-process
+         (make-network-process
+          :name "server-client-test" :family 'local :server nil :noquery t
+          :service (expand-file-name name server-socket-dir)))
+        t)
+    (file-error nil)))
+
 ;;;###autoload
 (define-minor-mode server-mode
   "Toggle Server mode.