diff options
Diffstat (limited to 'lib/snmp/src/misc')
| -rw-r--r-- | lib/snmp/src/misc/snmp_config.erl | 93 |
1 files changed, 80 insertions, 13 deletions
diff --git a/lib/snmp/src/misc/snmp_config.erl b/lib/snmp/src/misc/snmp_config.erl index 6ab20e3e48..1da2c339c7 100644 --- a/lib/snmp/src/misc/snmp_config.erl +++ b/lib/snmp/src/misc/snmp_config.erl @@ -90,6 +90,17 @@ ]). +-export_type([void/0, + verify_config_entry_function/0, + verify_config_function/0, + write_config_function/0]). + + +%%---------------------------------------------------------------------- + +-type void() :: term(). % Any value - ignored + + %%---------------------------------------------------------------------- %% Handy SNMP configuration %%---------------------------------------------------------------------- @@ -2356,53 +2367,109 @@ write_sys_config_file_manager_atl_opt(Fid, {seqno, SeqNo}) -> header() -> - {Y,Mo,D} = date(), - {H,Mi,S} = time(), + {Y, Mo, D} = date(), + {H, Mi, S} = time(), io_lib:format("%% This file was generated by " - "snmp_config (version-~s) ~w-~2.2.0w-~2.2.0w " + "~w (version-~s) ~w-~2.2.0w-~2.2.0w " "~2.2.0w:~2.2.0w:~2.2.0w\n", - [?version,Y,Mo,D,H,Mi,S]). + [?MODULE, ?version, Y, Mo, D, H, Mi, S]). + +%% *If* these functions are successfull, they successfully return anything +%% (which is ignored), but they fail with either a throw or an exit or +%% something similar. + +%% Verification of one config entry read from a file +-type(verify_config_entry_function() :: + fun((Entry :: term()) -> ok | {error, Reason :: term()})). + +%% Verification of config to be written +-type(verify_config_function() :: + fun(() -> void())). + +%% Write config to file (as defined by Fd) +-type(write_config_function() :: + fun((Fd :: file:io_device()) -> void())). + +-spec write_config_file(Dir :: string(), + FileName :: string(), + Verify :: verify_config_function(), + Write :: write_config_function()) -> + ok | {error, Reason :: term()}. write_config_file(Dir, FileName, Verify, Write) when (is_list(Dir) andalso is_list(FileName) andalso is_function(Verify) andalso is_function(Write)) -> - (catch do_write_config_file(Dir, FileName, Verify, Write)). + try + begin + do_write_config_file(Dir, FileName, Verify, Write) + end + catch + throw:Error -> + Error; + T:E -> + {error, {failed_write, Dir, FileName, T, E}} + end. + do_write_config_file(Dir, FileName, Verify, Write) -> Verify(), case file:open(filename:join(Dir, FileName), [write]) of {ok, Fd} -> - (catch Write(Fd)), - file:close(Fd), - ok; + file_write_and_close(Write, Fd, Dir, FileName); Error -> Error end. - append_config_file(Dir, FileName, Verify, Write) when (is_list(Dir) andalso is_list(FileName) andalso is_function(Verify) andalso is_function(Write)) -> - (catch do_append_config_file(Dir, FileName, Verify, Write)). + try + begin + do_append_config_file(Dir, FileName, Verify, Write) + end + catch + throw:Error -> + Error; + T:E -> + {error, {failed_append, Dir, FileName, T, E}} + end. do_append_config_file(Dir, FileName, Verify, Write) -> Verify(), case file:open(filename:join(Dir, FileName), [read, write]) of {ok, Fd} -> file:position(Fd, eof), - (catch Write(Fd)), - file:close(Fd), - ok; + file_write_and_close(Write, Fd, Dir, FileName); Error -> Error end. +file_write_and_close(Write, Fd, Dir, FileName) -> + ok = Write(Fd), + case file:sync(Fd) of + ok -> + case file:close(Fd) of + ok -> + ok; + {error, Reason} -> + {error, {failed_closing, Dir, FileName, Reason}} + end; + {error, Reason} -> + {error, {failed_syncing, Dir, FileName, Reason}} + end. + + +-spec read_config_file(Dir :: string(), + FileName :: string(), + Verify :: verify_config_entry_function()) -> + {ok, Config :: list()} | {error, Reason :: term()}. + read_config_file(Dir, FileName, Verify) when is_list(Dir) andalso is_list(FileName) andalso is_function(Verify) -> (catch do_read_config_file(Dir, FileName, Verify)). |