* linux-nat.c (linux_nat_terminal_inferior)

(linux_nat_terminal_ours): Don't check sync_execution.
	* remote.c (remote_terminal_inferior, remote_terminal_ours):
	Don't check sync_execution.  Update comments.
	* target.c (target_terminal_inferior): New.
	* target.h (target_terminal_inferior): Delete macro, and declare
	as function.
	* event-top.c (async_disable_stdin): Make idempotent.  Don't give
	the target the terminal here.
	* inflow.c (terminal_ours_1): Don't return early without setting
	`terminal_is_ours'.

gdb/target.c

@@ -301,6 +301,18 @@ target_create_inferior (char *exec_file, char *args,
 		  "could not find a target to create inferior");
 }
 
+void
+target_terminal_inferior (void)
+{
+  /* A background resume (``run&'') should leave GDB in control of the
+     terminal.  */
+  if (target_is_async_p () && !sync_execution)
+    return;
+
+  /* If GDB is resuming the inferior in the foreground, install
+     inferior's terminal modes.  */
+  (*current_target.to_terminal_inferior) ();
+}
 
 static int
 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,