int label_write_one_line_file_atomic(const char *fn, const char *line);
int label_write_env_file(const char *fname, char **l);
int label_fopen_temporary(const char *path, FILE **_f, char **_temp_path);
int label_write_one_line_file_atomic(const char *fn, const char *line);
int label_write_env_file(const char *fname, char **l);
int label_fopen_temporary(const char *path, FILE **_f, char **_temp_path);