Make logging work for MI.

	* NEWS: Mention it.
	* interps.h (interp_set_logging_ftype): New typedef.
	(struct interp_procs): New field set_logging_proc.
	(current_interp_set_logging): Declare.
	* interps.c (current_interp_set_logging): New function.
	* cli/cli-logging.c: Include interps.h.
	(set_logging_redirect): Call current_interp_set_logging.
	(pop_output_files): Ditto.
	(handle_redirections): Ditto, plus skip ui-out redirect if MI.
	* mi/mi-console.h (mi_console_set_raw): Declare.
	* mi/mi-console.c (mi_console_set_raw): New function.
	* mi/mi-interp.c (saved_raw_stdout): New global.
	(mi_set_logging): New function.
	(_initialize_mi_interp): Add it to interp procs.

	* gdb.mi/mi-logging.exp: New file.

1 files changed, 20 insertions, 0 deletions

diff --git a/gdb/interps.h b/gdb/interps.h
index bbf0838..2102eca 100644
--- a/gdb/interps.h
+++ b/gdb/interps.h
@@ -45,6 +45,10 @@ typedef struct gdb_exception (interp_exec_ftype) (void *data,
 typedef void (interp_command_loop_ftype) (void *data);
 typedef struct ui_out *(interp_ui_out_ftype) (struct interp *self);
 
+typedef int (interp_set_logging_ftype) (struct interp *self, int start_log,
+					struct ui_file *out,
+					struct ui_file *logfile);
+
 struct interp_procs
 {
   interp_init_ftype *init_proc;
@@ -59,6 +63,11 @@ struct interp_procs
      formatter.  */
   interp_ui_out_ftype *ui_out_proc;
 
+  /* Provides a hook for interpreters to do any additional
+     setup/cleanup that they might need when logging is enabled or
+     disabled.  */
+  interp_set_logging_ftype *set_logging_proc;
+
   interp_command_loop_ftype *command_loop_proc;
 };
 
@@ -74,6 +83,17 @@ extern struct interp *interp_set_temp (const char *name);
 extern int current_interp_named_p (const char *name);
 extern int current_interp_display_prompt_p (void);
 extern void current_interp_command_loop (void);
+
+/* Call this function to give the current interpreter an opportunity
+   to do any special handling of streams when logging is enabled or
+   disabled.  START_LOG is 1 when logging is starting, 0 when it ends,
+   and OUT is the stream for the log file; it will be NULL when
+   logging is ending.  LOGFILE is non-NULL if the output streams
+   are to be tees, with the log file as one of the outputs.  */
+
+extern int current_interp_set_logging (int start_log, struct ui_file *out,
+				       struct ui_file *logfile);
+
 /* Returns opaque data associated with the top-level interpreter.  */
 extern void *top_level_interpreter_data (void);
 extern struct interp *top_level_interpreter (void);