mod_posix: Move everything to util.startup
This allows greater control over the order of events.
Notably, the internal ordering between daemonization, initialization of
libunbound and setup of signal handling is sensitive.
libunbound starts a separate thread for processing DNS requests.
If this thread is started before signal handling has been set up, it
will not inherit the signal handlers and instead behave as it would have
before signal handlers were set up, i.e. cause the whole process to
immediately exit.
libunbound is usually initialized on the first DNS request, usually
triggered by an outgoing s2s connection attempt.
If daemonization happens before signals have been set up, signals may
not be processed at all.
local function parse(arg, config)
local short_params = config and config.short_params or {};
local value_params = config and config.value_params or {};
local array_params = config and config.array_params or {};
local parsed_opts = {};
if #arg == 0 then
return parsed_opts;
end
while true do
local raw_param = arg[1];
if not raw_param then
break;
end
local prefix = raw_param:match("^%-%-?");
if not prefix then
break;
elseif prefix == "--" and raw_param == "--" then
table.remove(arg, 1);
break;
end
local param = table.remove(arg, 1):sub(#prefix+1);
if #param == 1 and short_params then
param = short_params[param];
end
if not param then
return nil, "param-not-found", raw_param;
end
local param_k, param_v;
if value_params[param] or array_params[param] then
param_k, param_v = param, table.remove(arg, 1);
if not param_v then
return nil, "missing-value", raw_param;
end
else
param_k, param_v = param:match("^([^=]+)=(.+)$");
if not param_k then
if param:match("^no%-") then
param_k, param_v = param:sub(4), false;
else
param_k, param_v = param, true;
end
end
param_k = param_k:gsub("%-", "_");
end
if array_params[param] then
if parsed_opts[param_k] then
table.insert(parsed_opts[param_k], param_v);
else
parsed_opts[param_k] = { param_v };
end
else
parsed_opts[param_k] = param_v;
end
end
for i = 1, #arg do
parsed_opts[i] = arg[i];
end
return parsed_opts;
end
return {
parse = parse;
}