/usr/include/bobcat/hostname 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 | #ifndef INCLUDED_BOBCAT_HOSTNAME_
#define INCLUDED_BOBCAT_HOSTNAME_
#include <bobcat/hostent>
namespace FBB
{
class InetAddress;
class Hostname: public Hostent
{
    public:
        Hostname() = default;
                                // may be name or dotted decimal address
        explicit Hostname(std::string const &host);      // 1
        explicit Hostname(InetAddress const &address);   // 2
    private:
        void init();
};
} // FBB
#endif
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