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+// Copyright 2010 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/// \file utils/passwd.hpp
+/// Querying and manipulation of users and groups.
+
+#if !defined(UTILS_PASSWD_HPP)
+#define UTILS_PASSWD_HPP
+
+#include "utils/passwd_fwd.hpp"
+
+#include <string>
+#include <vector>
+
+namespace utils {
+namespace passwd {
+
+
+/// Represents a system user.
+class user {
+public:
+    /// The name of the user.
+    std::string name;
+
+    /// The system-wide identifier of the user.
+    unsigned int uid;
+
+    /// The login group identifier for the user.
+    unsigned int gid;
+
+    user(const std::string&, const unsigned int, const unsigned int);
+
+    bool is_root(void) const;
+};
+
+
+user current_user(void);
+user find_user_by_name(const std::string&);
+user find_user_by_uid(const unsigned int);
+void set_current_user_for_testing(const user&);
+void set_mock_users_for_testing(const std::vector< user >&);
+
+
+}  // namespace passwd
+}  // namespace utils
+
+#endif  // !defined(UTILS_PASSWD_HPP)