Land rapid7#7643, only use ANSI ctrl chars in stdio output

Author: dmohanty-r7

lib/rex/ui/text/output.rb

@@ -63,18 +63,7 @@ def print_status(msg = '')
   end
 
   def print_line(msg = '')
-    if (/mingw/ =~ RUBY_PLATFORM)
-      print(msg + "\n")
-      return
-    end
-    print("\033[s") # Save cursor position
-    print("\r\033[K" + msg + "\n")
-    if input and input.prompt
-      print("\r\033[K")
-      print(input.prompt.tr("\001\002", ''))
-      print(input.line_buffer.tr("\001\002", ''))
-      print("\033[u\033[B") # Restore cursor, move down one line
-    end
+   print(msg + "\n")
   end
 
   def print_warning(msg = '')

lib/rex/ui/text/output/stdio.rb

@@ -55,6 +55,23 @@ def io
     @io ||= $stdout
   end
 
+  # Use ANSI Control chars to reset prompt position for async output
+  # SEE https://github.com/rapid7/metasploit-framework/pull/7570
+  def print_line(msg = '')
+    if (/mingw/ =~ RUBY_PLATFORM)
+      print(msg + "\n")
+      return
+    end
+    print("\033[s") # Save cursor position
+    print("\r\033[K" + msg + "\n")
+    if input and input.prompt
+      print("\r\033[K")
+      print(input.prompt.tr("\001\002", ''))
+      print(input.line_buffer.tr("\001\002", ''))
+      print("\033[u\033[B") # Restore cursor, move down one line
+    end
+  end
+
   #
   # Prints the supplied message to standard output.
   #