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diff --git a/unit/atf-src/tools/application.hpp b/unit/atf-src/tools/application.hpp
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+//
+// Automated Testing Framework (atf)
+//
+// Copyright (c) 2007 The NetBSD Foundation, Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. 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.
+//
+// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+//
+
+#if !defined(TOOLS_APPLICATION_HPP)
+#define TOOLS_APPLICATION_HPP
+
+#include <ostream>
+#include <set>
+#include <stdexcept>
+#include <string>
+
+namespace tools {
+namespace application {
+
+// ------------------------------------------------------------------------
+// The "usage_error" class.
+// ------------------------------------------------------------------------
+
+class usage_error : public std::runtime_error {
+    char m_text[4096];
+
+public:
+    usage_error(const char*, ...) throw();
+    ~usage_error(void) throw();
+
+    const char* what(void) const throw();
+};
+
+// ------------------------------------------------------------------------
+// The "option" class.
+// ------------------------------------------------------------------------
+
+class option {
+    char m_character;
+    std::string m_argument;
+    std::string m_description;
+
+    friend class app;
+
+public:
+    option(char, const std::string&, const std::string&);
+
+    bool operator<(const option&) const;
+};
+
+// ------------------------------------------------------------------------
+// The "app" class.
+// ------------------------------------------------------------------------
+
+class app {
+    bool m_hflag;
+
+    void process_options(void);
+    void usage(std::ostream&);
+
+    bool inited(void);
+
+protected:
+    typedef std::set< option > options_set;
+
+    int m_argc;
+    char* const* m_argv;
+
+    const char* m_argv0;
+    const char* m_prog_name;
+    std::string m_description;
+    std::string m_manpage, m_global_manpage;
+
+    options_set options(void);
+
+    // To be redefined.
+    virtual std::string specific_args(void) const;
+    virtual options_set specific_options(void) const;
+    virtual void process_option(int, const char*);
+    virtual int main(void) = 0;
+
+public:
+    app(const std::string&, const std::string&, const std::string&);
+    virtual ~app(void);
+
+    int run(int, char* const*);
+};
+
+} // namespace application
+} // namespace tools
+
+#endif // !defined(TOOLS_APPLICATION_HPP)