Add sudo_clobber and sudo_append functions so that we can "echo"

src/scripts/common.sh

Index: src/scripts/common.sh
diff --git a/src/scripts/common.sh b/src/scripts/common.sh
index f75fa6b1301dc994d0eab7faa268ea1d3e8348f1..c5ae10413238823a0ce78a38a855839bc14455e9 100644
--- a/src/scripts/common.sh
+++ b/src/scripts/common.sh
@@ -149,8 +149,8 @@ esac
 # Functions
 
 function setup_board_warning {
-  echo  
-  echo "$V_REVERSE=================  WARNING  ======================$V_VIDOFF"  
+  echo
+  echo "$V_REVERSE=================  WARNING  ======================$V_VIDOFF"
   echo
   echo "*** No default board detected in " \
     "$GCLIENT_ROOT/src/scripts/.default_board"
@@ -162,8 +162,8 @@ function setup_board_warning {
 
 # Sets the default board variable for calling script
 function get_default_board {
-  DEFAULT_BOARD= 
-  
+  DEFAULT_BOARD=
+
   if [ -f "$GCLIENT_ROOT/src/scripts/.default_board" ] ; then
     DEFAULT_BOARD=`cat "$GCLIENT_ROOT/src/scripts/.default_board"`
   fi
@@ -323,3 +323,17 @@ function eretry () {
 function remove_quotes() {
   echo "$1" | sed -e "s/^'//; s/'$//"
 }
+
+# Writes stdin to the given file name as root using sudo in overwrite mode.
+#
+# $1 - The output file name.
+function sudo_clobber() {
+  sudo tee "$1" > /dev/null
+}
+
+# Writes stdin to the given file name as root using sudo in append mode.
+#
+# $1 - The output file name.
+function sudo_append() {
+  sudo tee -a "$1" > /dev/null
+}