/usr/include/bobcat/onekey is in libbobcat-dev 4.08.02-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #ifndef INCLUDED_BOBCAT_ONEKEY_
#define INCLUDED_BOBCAT_ONEKEY_
#include <termios.h>
namespace FBB
{
class OneKey
{
    termios     d_saved;
    bool        d_useEcho;          // default false
    public:
        enum Mode
        {
            OFF,      
            ON      
        };
        explicit OneKey(Mode state = OFF);    
        ~OneKey();
        int get() const;                // get the next char
        void setEcho(Mode state);                                   // .f
        void verify() const;            // kept for backward compat.
    private:
        OneKey(OneKey const &other) = delete;
        OneKey const &operator=(OneKey const &other) = delete;
};
inline void OneKey::setEcho(Mode state)
{
    d_useEcho = (state == ON);
}
} // FBB
#endif
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