have Puma set the PID of the master process

app.rb

@@ -117,7 +117,6 @@ class TickTock
   def initialize
     @pid = ppid
     @procfs_f = format "/proc/%s/stat", @pid
-    puts @pid
   end
 
   def uptime
@@ -185,20 +184,11 @@ class Sleep
 end
 
 def ppid
-  pid = Process.pid
-  # self
-  ps = File.open "/proc/#{pid}/stat", &:readline
-  ps = ps.split(" ")
-  ppid = Integer(ps[3])
-
-  # ppid
-  ps = File.open "/proc/#{ppid}/stat", &:readline
-  ps = ps.split(" ")
-
-  if ps[1].include? "ruby"
-    ppid
-  else
-    pid
+  pid = ENV.fetch "PUMA_PID", Process.pid
+  begin
+    Integer pid
+  rescue ArgumentError
+    -1
   end
 end
 

config/puma.rb

@@ -0,0 +1 @@
+ENV["PUMA_PID"] = Process.pid.to_s