diff --git a/include/utils/file.h b/include/utils/file.h
new file mode 100644
index 0000000..a80afb1
--- /dev/null
+++ b/include/utils/file.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef UTILS_FILE_H
+#define UTILS_FILE_H
+
+#include <string>
+#include <sys/stat.h>
+
+namespace android {
+
+bool ReadFdToString(int fd, std::string* content);
+bool ReadFileToString(const std::string& path, std::string* content);
+
+bool WriteStringToFile(const std::string& content, const std::string& path);
+bool WriteStringToFd(const std::string& content, int fd);
+
+#if !defined(_WIN32)
+bool WriteStringToFile(const std::string& content, const std::string& path,
+                       mode_t mode, uid_t owner, gid_t group);
+#endif
+
+} // namespace android
+
+#endif
diff --git a/include/utils/stringprintf.h b/include/utils/stringprintf.h
new file mode 100644
index 0000000..e7dbac7
--- /dev/null
+++ b/include/utils/stringprintf.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef UTILS_STRINGPRINTF_H_
+#define UTILS_STRINGPRINTF_H_
+
+#include <stdarg.h>
+#include <string>
+
+namespace android {
+
+// Returns a string corresponding to printf-like formatting of the arguments.
+std::string StringPrintf(const char* fmt, ...)
+        __attribute__((__format__(__printf__, 1, 2)));
+
+// Appends a printf-like formatting of the arguments to 'dst'.
+void StringAppendF(std::string* dst, const char* fmt, ...)
+        __attribute__((__format__(__printf__, 2, 3)));
+
+// Appends a printf-like formatting of the arguments to 'dst'.
+void StringAppendV(std::string* dst, const char* format, va_list ap);
+
+}  // namespace android
+
+#endif