prosody
82705ec87253
util/uuid.lua

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util/uuid.lua @ 10390:82705ec87253 0.11

util.startup: Ensure prosody.paths are absolute (see #1430) Normally these paths are injected into the installed 'prosody' executable as absolute paths, but it is possible to override at least the config path via environment variable or command line argument. This makes sure a path relative to pwd stays relative to that instead of the data directory.
author Kim Alvefur <zash@zash.se>
date Mon, 04 Nov 2019 00:29:49 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local random = require "util.random";
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10 local random_bytes = random.bytes;
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11 local hex = require "util.hex".to;
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12 local m_ceil = math.ceil;
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14 local function get_nibbles(n)
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15 return hex(random_bytes(m_ceil(n/2))):sub(1, n);
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16 end
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17
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18 local function get_twobits()
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19 return ("%x"):format(random_bytes(1):byte() % 4 + 8);
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20 end
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21
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22 local function generate()
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23 -- generate RFC 4122 complaint UUIDs (version 4 - random)
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24 return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
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25 end
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26
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27 return {
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28 get_nibbles=get_nibbles;
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29 generate = generate ;
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30 -- COMPAT
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31 seed = random.seed;
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32 };