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local awful = require("awful")
local lfs = require("lfs")
local function processwalker()
local function yieldprocess()
for dir in lfs.dir("/proc") do
if tonumber(dir) ~= nil then
local f, err = io.open("/proc/"..dir.."/cmdline")
if f then
local cmdline = f:read("*all")
f:close()
if cmdline ~= "" then
coroutine.yield(cmdline)
end
end
end
end
end
return coroutine.wrap(yieldprocess)
end
function run_once(process, cmd)
assert(type(process) == "string")
local regex_killer = {
["+"] = "%+", ["-"] = "%-",
["*"] = "%*", ["?"] = "%?" }
for p in processwalker() do
if p:find(process:gsub("[-+?*]", regex_killer)) then
return
end
end
return awful.spawn(cmd or process)
end
-- run once END
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