util.startup: Check root after detecting platform and reading config (thanks SigmaTel71)
Ensures that startup.detect_platform() runs so know whether to use the
POSIX method of checking the current user or something else. Also after
reading the config so we know whether the root override setting is set.
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local random = require "prosody.util.random";
local random_bytes = random.bytes;
local time = require "prosody.util.time";
local hex = require "prosody.util.hex".encode;
local m_ceil = math.ceil;
local m_floor = math.floor;
local function get_nibbles(n)
return hex(random_bytes(m_ceil(n/2))):sub(1, n);
end
local function get_twobits()
return ("%x"):format(random_bytes(1):byte() % 4 + 8);
end
local function generate()
-- generate RFC 4122 complaint UUIDs (version 4 - random)
return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
end
local function generate_v7()
-- Sortable based on time and random
-- https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format-01#section-4.4
local t = time.now();
local unixts = m_floor(t);
local unixts_a = m_floor(unixts / 16);
local unixts_b = m_floor(unixts % 16);
local subsec = t % 1;
local subsec_a = m_floor(subsec * 0x1000);
local subsec_b = m_floor(subsec * 0x1000000) % 0x1000;
return ("%08x-%x%03x-7%03x-%4s-%12s"):format(unixts_a, unixts_b, subsec_a, subsec_b, get_twobits() .. get_nibbles(3), get_nibbles(12));
end
return {
v4 = generate;
v7 = generate_v7;
get_nibbles=get_nibbles;
generate = generate ;
-- COMPAT
seed = random.seed;
};