晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/Modules/init/lisp
;;
;; emacs-lisp init code for Modules
;;

(setenv "MODULESHOME" "/usr/share/Modules")

(defvar Modules-history '() "module cmd history list")

(defun Modules-module (command)
  "Run the string COMMAND as a Modules cmd using the tcl version of modules.
Any resulting output is placed in buffer \" *modules-cmd*\".
This should consist of a single line, a filename, which is
expected to contain Emacs lisp code to implement the indicated
module commands.  The lisp code in this file is eval'd by Emacs
on successful completion of modulecmd.tcl.

Standard error output is placed in buffer \" *module-log*\" which will
be displayed if not empty.

Return value is t on success, nil otherwise."
  (interactive (list (read-string "Module cmd: " nil 'Modules-history)))
  (let
      ((cmd-buffer (get-buffer-create " *modules-cmd*"))
       (log-buffer (get-buffer-create " *modules-log*"))
       (log-scratch-file (make-temp-name 
                          (expand-file-name "modules-log"
                                            (if (fboundp 'temp-directory)
                                                (temp-directory)  ;; XEmacs
                                              temporary-file-directory))))
       (status nil))

    ;; clear cmd buffer, log buffer is replaced below 
    (set-buffer cmd-buffer)
    (delete-region (point-min) (point-max))

    (if (condition-case nil
            ;; call-process on Emacs cannot write stderr to a separate buffer
            ;; so it must go to a file and then get pulled into the log buffer
            ;; (XEmacs *can* direct stderr to buffer, but not worth special case)
            (progn
              (apply 'call-process "/usr/bin/tclsh" nil
                                   (list cmd-buffer log-scratch-file)
                                   nil          ;; don't display stdout
                                   "/usr/share/Modules/libexec/modulecmd.tcl"
                                   "lisp" (split-string command))
              t)
          (error nil))
        (progn
          ;; pull any log info from log-scratch-file into log-buffer
          (set-buffer log-buffer)
          (insert-file-contents log-scratch-file nil nil nil t)

          ;; display any output written to stderr ( eg: module help|list )
          (if (> (buffer-size) 0)
              (switch-to-buffer-other-window log-buffer))

          ;; Run any setenv, etc commands produced by modulecmd.tcl
          ;; cmd-buffer should currently contain the pathname of file to run
          ;; Note: use eval-buffer instead of load-file to avoid stomping
          ;; any (message) output from the script itself.
          (set-buffer cmd-buffer)
          (if (> (buffer-size) 0)
              (progn
                ;; run it carefully.  If an error is thrown, catch it and
                ;; propagate the fact upwards as a nil, but be sure to still
                ;; execute cleanup below
                (setq status
                      (condition-case nil
                          (progn
                            (eval-buffer)
                            t)
                        (error nil)))))))

    ;; all done, clean up
    (delete-file log-scratch-file)

    status))

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