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-- Authors: tyranix <tyranix@gmail.com>
-- License: Public domain
-- Last Changed: Unknown
--
-- statusd_uname.lua
--[[
Example of how to use statusd.popen_bgread() with coroutines to avoid blocking
while reading I/O.
This only has one key to keep it simple: %uname_a
Normal Usage:
1) If you do not have ~/.ion3/cfg_statusbar.lua, copy that file from Ion3 to
your ~/.ion3 directory. On Debian, it is in /etc/X11/ion3/cfg_statusbar.lua.
2) Ion3 will load the appropriate modules if they are in the template at
startup.
So place '%uname_a' into the template in ~/.ion3/cfg_statusbar.lua.
Also, if you want to test this independent of ion, you can do this:
1) Copy statusd_uname.lua to ~/.ion3/
2) Run '/usr/lib/ion3/ion-statusd -m uname'
This will dump out all of the updates to the terminal as they happen
3) Hit control+c when you are done testing.
License: Public domain
tyranix [ tyranix at gmail ]
--]]
local defaults={
-- Update every minute
update_interval=60*1000,
}
local uname_timer = nil
local settings=table.join(statusd.get_config("uname"), defaults)
-- Parse the output and then tell statusd when we have all of the value.
function parse_uname(partial_data)
-- Keep reading partial_data until it returns nil
local result = ""
while partial_data do
result = result .. partial_data
-- statusd.popen_bgread() will resume us when it has more data
partial_data = coroutine.yield()
end
-- If we have a new result, tell statusd
if result and result ~= "" then
statusd.inform("uname_a", result)
end
-- Setup the next execution.
uname_timer:set(settings.update_interval, update_uname)
end
-- If we get any stderr, just print it out.
local function flush_stderr(partial_data)
-- Continually grab stderr
local result = ""
while partial_data do
result = result .. partial_data
partial_data = coroutine.yield()
end
if result and result ~= "" then
print("STDERR:", result, "\n")
end
end
-- Query mocp to get information for statusd.
function update_uname()
statusd.popen_bgread('uname -a',
coroutine.wrap(parse_uname),
coroutine.wrap(flush_stderr))
end
-- Timer so we can keep telling statusd what the current value is.
uname_timer = statusd.create_timer()
update_uname()
-- vim:tw=0:
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