net_adm:host_file/0
读取 .hosts.erlang 文件
用法:
host_file() -> Hosts | {error, Reason}
内部实现:
-spec host_file() -> Hosts | {error, Reason} when Hosts :: [Host :: atom()], %% Copied from file:path_consult/2: Reason :: file:posix() | badarg | terminated | system_limit | {Line :: integer(), Mod :: module(), Term :: term()}. host_file() -> Home = case init:get_argument(home) of {ok, [[H]]} -> [H]; _ -> [] end, case file:path_consult(["."] ++ Home ++ [code:root_dir()], ".hosts.erlang") of {ok, Hosts, _} -> Hosts; Error -> Error end.
读取文件 .hosts.erlang,文件里的 hosts 数据 以一个列表返回,如果文件不能被堵,或者文件里的 Erlang 项(terms)不能被解析,则返回 {error, Reason}。
net_adm:host_file().