Fix some prefs for darwin environment

emacs.el

@@ -942,8 +942,12 @@ IF OK-IF-ALREADY-EXISTS is true force download."
                             (number-to-string (emacs-pid))))
 
   ;; In Cygwin Environment `server-runnning-p' stops when server-use-tcp is nil
-  (when (eq system-type
-            'cygwin)
+  ;; In Darwin environment, init fails with message like 'Service name too long'
+  ;; when server-use-tcp is nil
+  (when (or (eq system-type
+                'cygwin)
+            (eq system-type
+                'darwin))
     (setq server-use-tcp t))
 
   (defun my-construct-emacsclient-editor-command ()

shrc

@@ -613,7 +613,13 @@ __realpath(){
     fi
 }
 
-__safe_alias tmux='env -u SHLVL tmux'
+if $isdarwin
+then
+    # I want to use env -u, but darwin env does not provide this option
+    __safe_alias tmux='SHLVL= tmux'
+else
+    __safe_alias tmux='env -u SHLVL tmux'
+fi
 tx(){
     tmux start-server
     if test -z "$1"