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%% This tests the presence of possible races due to an ets:lookup/ets:insert
%% combination. It takes into account control flow that might exist.
-module(ets_insert_control_flow4).
-export([start/1]).
start(User) ->
Table = ets:new(table, [public]),
mod:process(Table),
[{_, N}] =
case User of
root -> ets:lookup(Table, pass);
user -> ets:lookup(Table, pass);
_Other -> [{undefined, -1}]
end,
case N of
-1 -> io:format("\nUnknown User\n", []);
0 ->
case User of
root ->
ets:insert(Table, {pass, Pass = generate_password(N) ++ generate_password(N+1)});
user ->
ets:insert(Table, {pass, Pass = generate_password(N)})
end,
io:format("\nYour new pass is ~w\n", [Pass]);
P ->
io:format("\nYour pass is ~w\n", [P])
end.
generate_password(N) ->
lists:map(fun (_) -> random:uniform(90)+$\s+1 end, lists:seq(1,N)).
|
