Store local environment in frame (not terminal) parameters.

* src/callproc.c (child_setup, getenv_internal, Fgetenv_internal):
  Store the local environment in a frame (not terminal) parameter.
  Update doc strings.
  (syms_of_callproc): Update doc strings.
  (Qenvironment): Moved to frame.c. 

* lisp/env.el (read-envvar-name, setenv, getenv, environment): Use frame
  parameters to store the local environment, not terminal parameters.

* server.el (server-process-filter): Store the local environment in a
  frame (not terminal) parameter.  Do not try to decode environment
  strings.

* lisp/frame.el (make-frame): Set up the 'environment frame parameter,
  when needed.

* src/frame.c (Qenvironment): Move here from callproc.c.
  (Fdelete_frame): Don't allow other frames to refer to a deleted frame
  in their 'environment parameter.
  (Fframe_with_environment): New function.
  (syms_of_frame): Defsubr it.  Initialize and staticpro Qenvironment.

* frame.h (Qenvironment): Declare.
* lisp.h (Fframe_with_environment): EXFUN it.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-467

1 files changed, 15 insertions, 1 deletions

diff --git a/README.multi-tty b/README.multi-tty
index 9f3e048e2e2..346d27102bf 100644
--- a/README.multi-tty
+++ b/README.multi-tty
@@ -412,7 +412,10 @@ THINGS TO DO
 
         make_terminal_frame
                 create_tty_output
-        
+
+** Decide whether to keep the C implementation of terminal parameters,
+   or revert to the previous, purely Lisp code.  It turned out that
+   local environments do not need terminal parameters after all.
 
 ** Move Fsend_string_to_terminal to term.c, and declare get_named_tty
    as static, removing it from dispextern.h.
@@ -1362,5 +1365,16 @@ DIARY OF CHANGES
    `getenv' and `setenv', and the new `local-environment-variables'
    facility.  Yay!)
 
+   (Updated in patch-465 to fix the semantics of let-binding
+   `process-environment'.  `process-environment' was changed to
+   override all local/global environment variables, and a new variable
+   `global-environment' was introduced to have `process-environment's
+   old meaning.)
+
+   (Updated in patch-466 to fix the case when two emacsclient sessions
+   share the same terminal, but have different environment.  The local
+   environment lists are now stored as frame parameters, so the
+   C-level terminal parameters are not strictly necessary any more.)
+
 ;;; arch-tag: 8da1619e-2e79-41a8-9ac9-a0485daad17d