adjust crawler log directory

src/crawler/crawler_app.erl

@@ -30,7 +30,8 @@ do_start() ->
 	crawler_sup:start_link({StartPort, Count, DBHost, DBPort, LogLevel, DBConn, CacheMaxTime, CacheMaxCount}).
 
 start() ->
-	error_logger:logfile({open, "crash.log"}),
+	filelib:ensure_dir("log/"),
+	error_logger:logfile({open, "log/crash.log"}),
 	code:add_path("deps/bson/ebin"),
 	code:add_path("deps/kdht/ebin"),
 	code:add_path("deps/mongodb/ebin"),

src/crawler/crawler_stats.erl

@@ -136,7 +136,8 @@ date_string() ->
 -define(TEXT(Fmt, Arg), lists:flatten(io_lib:format(Fmt, Arg))).
 
 do_dump(State) ->
-	{ok, FP} = file:open("dhtcrawler-stats.txt", [append]),
+	filelib:ensure_dir("log/"),
+	{ok, FP} = file:open("log/dhtcrawler-stats.txt", [append]),
 	io:format(FP, "~s~n", [date_string()]),
 	io:format(FP, "~s~n", [format_stats(State)]),
 	file:close(FP).

src/crawler/crawler_sup.erl

@@ -24,7 +24,8 @@ srv_name() ->
 init([{StartPort, Count, DBHost, DBPort, LogLevel, DBConn, CacheTime, HashCacheMax}]) ->
 	Spec = {one_for_one, 1, 600},
 	Instances = create_dht_instance(StartPort, Count),
-	Logger = [{dht_logger, {vlog, start_link, ["dht_crawler.txt", LogLevel]},
+	filelib:ensure_dir("log/"),
+	Logger = [{dht_logger, {vlog, start_link, ["log/dht_crawler.txt", LogLevel]},
 					permanent, 2000, worker, dynamic}],
 	HashInserter = [{hash_cache_writer, {hash_cache_writer, start_link, [DBHost, DBPort, DBConn, CacheTime, HashCacheMax]},
 					permanent, 2000, worker, dynamic}],