mod_measure_process: Report the enforced limit
The soft limit is what the kernel actually enforces, while the hard
limit is is how far you can change the soft limit without privileges.
Unless the process dynamically adjusts the soft limit, knowing the hard
limit is not as useful as knowing the soft limit.
Reporting the soft limit and the number of in-use FDs allows placing
alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
local jid_split = require "util.jid".split;
module:depends"muc";
local webchat_baseurl = module:get_option_string("muc_webchat_baseurl", nil);
local function get_default_url(room)
if not webchat_baseurl then
-- no template
return nil;
end
if room:get_hidden() or room:get_members_only() or room:get_password() then
-- not a public room
return nil;
end
return (webchat_baseurl:gsub("{(%w+)}", {
jid = room.jid,
node = select(1, jid_split(room.jid)),
host = select(2, jid_split(room.jid)),
}));
end
local function get_webchat_url(room)
local webchat_url = room._data.webchat_url;
if webchat_url then -- explicitly configured
return webchat_url;
end
return get_default_url(room);
end
module:hook("muc-config-form", function(event)
local room, form = event.room, event.form;
table.insert(form, {
name = "muc#roomconfig_webchat_url",
type = "text-single",
label = "URL where this room can be joined",
datatype = "xs:anyURI",
value = get_webchat_url(room),
});
end);
module:hook("muc-config-submitted", function(event)
local room, fields, changed = event.room, event.fields, event.changed;
local new = fields["muc#roomconfig_webchat_url"];
if new ~= get_webchat_url(room) then
if new == get_default_url(room) then
room._data.webchat_url = nil;
else
room._data.webchat_url = new;
end
if type(changed) == "table" then
changed["muc#roomconfig_webchat_url"] = true;
else
event.changed = true;
end
end
end);
module:hook("muc-disco#info", function (event)
local room, form, formdata = event.room, event.form, event.formdata;
local webchat_url = get_webchat_url(room);
if not webchat_url or webchat_url == "" then
return;
end
table.insert(form, {
name = "muc#roominfo_webchat_url",
});
formdata["muc#roominfo_webchat_url"] = webchat_url;
end);