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authorMicael Karlberg <[email protected]>2013-05-23 17:03:17 +0200
committerMicael Karlberg <[email protected]>2013-05-23 17:03:17 +0200
commit2fa265b38aeac7c4f29a878af6a7d3c49fe50931 (patch)
treec9fadea923d014846402983700bb8a090443a795 /lib
parent38472ca2c30906d55dc0bee8f9fc2ed97b8576f3 (diff)
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[snmp/agent] Handle mib-storage ets module non-ex file
Make sure snmpa_mib_storage_ets can handle a non-ex file whe n openning a table (it should simply create it).
Diffstat (limited to 'lib')
-rw-r--r--lib/snmp/src/agent/snmpa_mib_storage_ets.erl30
1 files changed, 29 insertions, 1 deletions
diff --git a/lib/snmp/src/agent/snmpa_mib_storage_ets.erl b/lib/snmp/src/agent/snmpa_mib_storage_ets.erl
index 4afdc76ee5..852df06fa0 100644
--- a/lib/snmp/src/agent/snmpa_mib_storage_ets.erl
+++ b/lib/snmp/src/agent/snmpa_mib_storage_ets.erl
@@ -73,19 +73,29 @@ open(Name, RecName, _Fields, Type, Opts) ->
{value, {dir, Dir}} ->
Action = snmp_misc:get_option(action, Opts, keep),
Checksum = snmp_misc:get_option(checksum, Opts, false),
- ?vtrace("open ~p database ~p", [Type, Name]),
+ ?vtrace("open ~p database ~p - check if file exist", [Type, Name]),
File = filename:join(Dir, atom_to_list(Name) ++ ".db"),
case file:read_file_info(File) of
{ok, _} ->
+ ?vdebug("open ~p database ~p - file exist - try reading",
+ [Type, Name]),
case ets:file2tab(File, [{verify, Checksum}]) of
{ok, ID} ->
+ ?vtrace("open ~p database ~p - "
+ "data read from file", [Type, Name]),
{ok, #tab{id = ID,
rec_name = RecName,
file = File,
checksum = Checksum}};
{error, Reason} when (Action =:= keep) ->
+ ?vinfo("open ~p database ~p - "
+ "failed reading from file (keep)",
+ [Type, Name, Reason]),
{error, {file2tab, Reason}};
{error, Reason} ->
+ ?vlog("open ~p database ~p - "
+ "failed reading from file (clear)",
+ [Type, Name, Reason]),
user_err("Warning: could not read file - "
"create new (empty): "
"~n File: ~p"
@@ -97,9 +107,26 @@ open(Name, RecName, _Fields, Type, Opts) ->
file = File,
checksum = Checksum}}
end;
+ {error, enoent} ->
+ %% No such file - create it
+ ?vdebug("open ~p database ~p - "
+ "file does *not* exist - create",
+ [Type, Name]),
+ ID = ets:new(Name, [Type, protected, {keypos, 2}]),
+ write_ets_file(ID, File, Checksum),
+ {ok, #tab{id = ID,
+ rec_name = RecName,
+ file = File,
+ checksum = Checksum}};
{error, Reason} when (Action =:= keep) ->
+ ?vinfo("open ~p database ~p - "
+ "failed reading file info (keep)",
+ [Type, Name, Reason]),
{error, {read_file_info, Reason}};
{error, Reason} ->
+ ?vlog("open ~p database ~p - "
+ "failed reading file info (clear)",
+ [Type, Name, Reason]),
user_err("Warning: could not read file info - "
"create new: "
"~n File: ~p"
@@ -112,6 +139,7 @@ open(Name, RecName, _Fields, Type, Opts) ->
checksum = Checksum}}
end;
false ->
+ ?vdebug("open ~p database ~p - ok", [Type, Name]),
ID = ets:new(Name, [Type, protected, {keypos, 2}]),
{ok, #tab{id = ID, rec_name = RecName}}
end.