1 files changed, 35 insertions, 0 deletions
diff --git a/.config/awesome/functions/run_once.lua b/.config/awesome/functions/run_once.lua
new file mode 100644
index 0000000..7c57482
--- /dev/null
+++ b/.config/awesome/functions/run_once.lua
@@ -0,0 +1,35 @@
+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