view plugins/mod_motd.lua @ 14181:6fb6e383123f 13.0

util.signal: Fix signalfd closure on non-Linux systems The loop was incorrect for 0-indexed arrays. It started at signalfd_num, which is the total number of signalfds, and decremented to 1 (condition was >0). So if 1 signalfd was registered, it would check only signalfds[1]. At capacity (32 signalfds) it would read past the end of the array. In every case, it would always skip the entry at position [0], leading to a leak. The swap-with-tail removal of the matched item used the post-decrement operator, leading to accessing the array slot just beyond the tail. Finally, it didn't break after finding a match. Probably harmless, but there isn't expected to be more than a single entry per fd, as far as I can tell.
author Matthew Wild <mwild1@gmail.com>
date Mon, 25 May 2026 16:02:39 +0100
parents 74b9e05af71e
children
line wrap: on
line source

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2010 Jeff Mitchell
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local host = module:get_host();
local motd_text = module:get_option_string("motd_text");
local motd_jid = module:get_option_string("motd_jid", host);

if not motd_text then return; end

local st = require "prosody.util.stanza";

motd_text = motd_text:gsub("^%s*(.-)%s*$", "%1"):gsub("\n[ \t]+", "\n"); -- Strip indentation from the config

module:hook("presence/initial", function (event)
	local session = event.origin;
	local motd_stanza =
		st.message({ to = session.full_jid, from = motd_jid })
			:tag("body"):text(motd_text);
	module:send(motd_stanza);
	module:log("debug", "MOTD send to user %s", session.full_jid);
end, 1);