add more error checking

bootstrap.sh

@@ -105,12 +105,18 @@ get_file() {
 
     if [ -e "${dest_file}" ] ; then mv "${dest_file}" "${dest_file}.${TIMESTAMP}" ; fi
     if ! curl -f -o "${dest_file}" "${source_file}" ; then
-        echo "ERROR - Unable to download \"${source_file}\""	>&2
-        echo "        to \"${dest_file}\"."			>&2
+        echo "ERROR - Unable to download \"${source_file}\"" >&2
+        echo "        to \"${dest_file}\"." >&2
+        exit 4
+    fi
+    if ! chown "${dest_file_ownership}" "${dest_file}" ; then
+        echo "ERROR - Unable to change ownership of \"${dest_file}\" to \"${dest_file_ownership}\"" >&2
+        exit 4
+    fi
+    if ! chmod "${dest_file_permissions}" "${dest_file}" ; then
+        echo "ERROR - Unable to change permissions of \"${dest_file}\" to \"${dest_file_permissions}\"" >&2
         exit 4
     fi
-    chown "${dest_file_ownership}" "${dest_file}"
-    chmod "${dest_file_permissions}" "${dest_file}"
 }
 
 # $directory $directory_ownership $directory_permissions
@@ -121,9 +127,18 @@ create_directory() {
     directory_ownership ="${2}"
     directory_permissions="${3}"
 
-    mkdir -p "${directory}"
-    chown "${directory_ownership}" "${directory}"
-    chmod "${directory_permissions}" "${directory}"
+    if ! mkdir -p "${directory}" ; then
+        echo "ERROR - Unable to create directory \"${directory}\"" >&2
+        exit 5
+    fi
+    if ! chown "${directory_ownership}" "${directory}" ; then
+        echo "ERROR - Unable to change ownership of \"${directory}\" to \"${directory_ownership}\"" >&2
+        exit 5
+    fi
+    if ! chmod "${directory_permissions}" "${directory}" ; then
+        echo "ERROR - Unable to change permissions of \"${directory}\" to \"${directory_permissions}\"" >&2
+        exit 5
+    fi
 }
 
 # $command_line