some more fixes that would work in fb devservers.

config/.profile.prompt

@@ -152,5 +152,11 @@ if [ -n "$PS1" ]; then
         # calculate prompt length. The text is set through PROMPT_COMMAND
         PS1+="\[${c_reset}\]\$ "              # reset colors and print $
     }
+
+    if [ -n "$BASH_VERSION" ]; then
+        # shopt -s checkwinsize
+        export -f __prompt_command
+        export -f term_colors
+    fi
 fi