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authorSteve Vinoski <[email protected]>2013-09-20 14:23:35 -0400
committerMicael Karlberg <[email protected]>2013-10-09 11:21:04 +0200
commitc83c236f6a0a1a5299376e40db57e7b7527cbac7 (patch)
tree61253108c10682e359d7260ea6547a1a7ac4e10d /lib/snmp/src
parent50e91bde3403c788bb1cabe644534f351d6dc1c1 (diff)
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[snmp/agent] enable SNMP to create missing database directories
Add {db_init_error, create_db_and_dir} option to SNMP manager and agent. This allows them to create any missing parent directories for db_dir, rather than treating any missing directories as a fatal error. The default for db_init_error, which is terminate, is unchanged. Add create_db_and_dir to the documentation. Add new tests to verify that using create_db_and_dir results in missing parent directories being created.
Diffstat (limited to 'lib/snmp/src')
-rw-r--r--lib/snmp/src/agent/snmpa_local_db.erl6
-rw-r--r--lib/snmp/src/agent/snmpa_supervisor.erl2
-rw-r--r--lib/snmp/src/manager/snmpm_config.erl31
3 files changed, 33 insertions, 6 deletions
diff --git a/lib/snmp/src/agent/snmpa_local_db.erl b/lib/snmp/src/agent/snmpa_local_db.erl
index 5198c6ec4e..a1e41257ce 100644
--- a/lib/snmp/src/agent/snmpa_local_db.erl
+++ b/lib/snmp/src/agent/snmpa_local_db.erl
@@ -191,6 +191,12 @@ dets_open(DbDir, DbInitError, Opts) ->
end
end;
_ ->
+ case DbInitError of
+ create_db_and_dir ->
+ ok = filelib:ensure_dir(Filename);
+ _ ->
+ ok
+ end,
case do_dets_open(Name, Filename, Opts) of
{ok, Dets} ->
?vdebug("dets open done",[]),
diff --git a/lib/snmp/src/agent/snmpa_supervisor.erl b/lib/snmp/src/agent/snmpa_supervisor.erl
index aebcdbaa84..77ed54bee4 100644
--- a/lib/snmp/src/agent/snmpa_supervisor.erl
+++ b/lib/snmp/src/agent/snmpa_supervisor.erl
@@ -356,7 +356,7 @@ init([AgentType, Opts]) ->
SymStoreSpec =
worker_spec(snmpa_symbolic_store, SymStoreArgs, Restart, 2000),
- LdbArgs = [Prio, DbDir, LdbOpts],
+ LdbArgs = [Prio, DbDir, DbInitError, LdbOpts],
LocalDbSpec =
worker_spec(snmpa_local_db, LdbArgs, Restart, 5000),
diff --git a/lib/snmp/src/manager/snmpm_config.erl b/lib/snmp/src/manager/snmpm_config.erl
index 736debe544..2101ad46e1 100644
--- a/lib/snmp/src/manager/snmpm_config.erl
+++ b/lib/snmp/src/manager/snmpm_config.erl
@@ -1215,6 +1215,12 @@ dets_open(Dir, DbInitError, Repair, AutoSave) ->
end
end;
_ ->
+ case DbInitError of
+ create_db_and_dir ->
+ ok = filelib:ensure_dir(Filename);
+ _ ->
+ ok
+ end,
case do_dets_open(Name, Filename, Repair, AutoSave) of
{ok, _Dets} ->
ok;
@@ -1316,7 +1322,14 @@ verify_option({server, ServerOpts}) ->
verify_server_opts(ServerOpts);
verify_option({note_store, NoteStoreOpts}) ->
verify_note_store_opts(NoteStoreOpts);
-verify_option({config, ConfOpts}) ->
+verify_option({config, ConfOpts0}) ->
+ %% Make sure any db_dir option is first in the options list to make it
+ %% easier to check if the db_init_error option specifies that a missing
+ %% db_dir should be created.
+ ConfOpts = case lists:keytake(db_dir, 1, ConfOpts0) of
+ false -> ConfOpts0;
+ {value, Result, OtherOpts} -> [Result|OtherOpts]
+ end,
verify_config_opts(ConfOpts);
verify_option({versions, Vsns}) ->
verify_versions(Vsns);
@@ -1365,7 +1378,12 @@ verify_config_opts([{dir, Dir}|Opts]) ->
verify_conf_dir(Dir),
verify_config_opts(Opts);
verify_config_opts([{db_dir, Dir}|Opts]) ->
- verify_conf_db_dir(Dir),
+ case lists:keyfind(db_init_error, 1, Opts) of
+ {db_init_error, create_db_and_dir} ->
+ verify_conf_db_dir(Dir, false);
+ _ ->
+ verify_conf_db_dir(Dir, true)
+ end,
verify_config_opts(Opts);
verify_config_opts([{db_init_error, DbInitErr}|Opts]) ->
verify_conf_db_init_error(DbInitErr),
@@ -1443,7 +1461,7 @@ verify_conf_dir(Dir) ->
error({invalid_conf_dir, Dir})
end.
-verify_conf_db_dir(Dir) ->
+verify_conf_db_dir(Dir, true) ->
case (catch verify_dir(Dir)) of
ok ->
ok;
@@ -1451,13 +1469,16 @@ verify_conf_db_dir(Dir) ->
error({invalid_conf_db_dir, Dir, Reason});
_ ->
error({invalid_conf_db_dir, Dir})
- end.
-
+ end;
+verify_conf_db_dir(_Dir, false) ->
+ ok.
verify_conf_db_init_error(terminate) ->
ok;
verify_conf_db_init_error(create) ->
ok;
+verify_conf_db_init_error(create_db_and_dir) ->
+ ok;
verify_conf_db_init_error(InvalidDbInitError) ->
error({invalid_conf_db_init_error, InvalidDbInitError}).