app.rb

@@ -117,6 +117,7 @@ class TickTock
   def initialize
     @pid = ppid
     @procfs_f = format "/proc/%s/stat", @pid
+    puts @pid
   end
 
   def uptime
@@ -184,11 +185,20 @@ class Sleep
 end
 
 def ppid
-  pid = ENV.fetch "PUMA_PID", Process.pid
-  begin
-    Integer pid
-  rescue ArgumentError
-    -1
+  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
   end
 end
 
@@ -374,7 +384,7 @@ post "/halt" do
   nil
 end
 
-get "/pid", provides: "json" do
+get "/pid" do
   pretty = params.key? :pretty
 
   jsonify({ppid: ppid, pid: Process.pid}, pretty:)

config/puma.rb

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