unix-socket.hon commit ls-files -k: a directory only can be killed if the index has a non-directory (2eac2a4)
   1#ifndef UNIX_SOCKET_H
   2#define UNIX_SOCKET_H
   3
   4int unix_stream_connect(const char *path);
   5int unix_stream_listen(const char *path);
   6
   7#endif /* UNIX_SOCKET_H */