Use install(1) where possible

This eliminated a number of sudo calls by doing the copy/chown/chmod in
a single step and sets a common pattern.

Change-Id: I9c8f48854d5bc443cc187df0948c28b82c4d2838
diff --git a/lib/cinder b/lib/cinder
index 880af1f..51f0163 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -174,16 +174,15 @@
     if [[ -d $CINDER_CONF_DIR/rootwrap.d ]]; then
         sudo rm -rf $CINDER_CONF_DIR/rootwrap.d
     fi
+
     # Deploy filters to /etc/cinder/rootwrap.d
-    sudo mkdir -m 755 $CINDER_CONF_DIR/rootwrap.d
-    sudo cp $CINDER_DIR/etc/cinder/rootwrap.d/*.filters $CINDER_CONF_DIR/rootwrap.d
-    sudo chown -R root:root $CINDER_CONF_DIR/rootwrap.d
-    sudo chmod 644 $CINDER_CONF_DIR/rootwrap.d/*
+    sudo install -d -o root -g root -m 755 $CINDER_CONF_DIR/rootwrap.d
+    sudo install -o root -g root -m 644 $CINDER_DIR/etc/cinder/rootwrap.d/*.filters $CINDER_CONF_DIR/rootwrap.d
+
     # Set up rootwrap.conf, pointing to /etc/cinder/rootwrap.d
-    sudo cp $CINDER_DIR/etc/cinder/rootwrap.conf $CINDER_CONF_DIR/
+    sudo install -o root -g root -m 644 $CINDER_DIR/etc/cinder/rootwrap.conf $CINDER_CONF_DIR
     sudo sed -e "s:^filters_path=.*$:filters_path=$CINDER_CONF_DIR/rootwrap.d:" -i $CINDER_CONF_DIR/rootwrap.conf
-    sudo chown root:root $CINDER_CONF_DIR/rootwrap.conf
-    sudo chmod 0644 $CINDER_CONF_DIR/rootwrap.conf
+
     # Specify rootwrap.conf as first parameter to rootwrap
     ROOTWRAP_CSUDOER_CMD="$cinder_rootwrap $CINDER_CONF_DIR/rootwrap.conf *"
 
@@ -197,10 +196,7 @@
 
 # configure_cinder() - Set config files, create data dirs, etc
 function configure_cinder {
-    if [[ ! -d $CINDER_CONF_DIR ]]; then
-        sudo mkdir -p $CINDER_CONF_DIR
-    fi
-    sudo chown $STACK_USER $CINDER_CONF_DIR
+    sudo install -d -o $STACK_USER -m 755 $CINDER_CONF_DIR
 
     cp -p $CINDER_DIR/etc/cinder/policy.json $CINDER_CONF_DIR
 
@@ -351,8 +347,7 @@
 # create_cinder_cache_dir() - Part of the init_cinder() process
 function create_cinder_cache_dir {
     # Create cache dir
-    sudo mkdir -p $CINDER_AUTH_CACHE_DIR
-    sudo chown $STACK_USER $CINDER_AUTH_CACHE_DIR
+    sudo install -d -o $STACK_USER $CINDER_AUTH_CACHE_DIR
     rm -f $CINDER_AUTH_CACHE_DIR/*
 }