create_cookie(Name) ->
Seed = abs(erlang:monotonic_time()
bxor erlang:unique_integer()),
Cookie = random_cookie(20, Seed, []),
case file:open(Name, [write, raw]) of
{ok, File} ->
R1 = file:write(File, Cookie),
ok = file:close(File),
R2 = file:raw_write_file_info(Name, make_info(Name)),
case {R1, R2} of
{ok, ok} ->
ok;
{{error,Reason}, _} ->
{error,
lists:flatten(
io_lib:format("Failed to write to cookie file '~ts':
~p", [Name, Reason]))};
{ok, {error, Reason}} ->
{error, "Failed to change mode: " ++ atom_to_list(Reason)}
end;
{error,Reason} ->
{error,
lists:flatten(
io_lib:format("Failed to create cookie file '~ts': ~p", [Name,
Reason]))}
end.
So, R2 = file:raw_write_file_info(Name, make_info(Name)), is failing.
raw_write_file_info is obsolete, and is a wrapper around write_file_info now.
Digging more.... maybe i could invoke an erlang expert.
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https://bugs.launchpad.net/bugs/1808984
Title:
s390x: erlang.cookie creation fails when changing file permissions
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