add more error checking

bootstrap.sh

@@ -109,8 +109,14 @@ get_file() {
         echo "        to \"${dest_file}\"." >&2
         exit 4
     fi
-    chown "${dest_file_ownership}" "${dest_file}"
-    chmod "${dest_file_permissions}" "${dest_file}"
+    if ! chown "${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
 }
 
 # $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