workaround to get pid

openvpn.py

@@ -47,6 +47,7 @@ class Openvpn:
         self.run_task = None
         self.openvpn_api = None
         self.name = name
+        self.pid_fp = None
         if loop:
             self.loop = loop
         else:
@@ -75,7 +76,7 @@ class Openvpn:
         if self.status == IDLE:
             self.status = RUNNING
             config_fp = self.generate_config_file()
-            cmd = " ".join(["", "openvpn", "--config", config_fp])
+            cmd = " ".join(["openvpn", "--config", config_fp])
             self.run_task = self.loop.create_task(self.run(cmd))
 
     def get_log(self):
@@ -93,7 +94,7 @@ class Openvpn:
     async def stop(self):
         if self.status == RUNNING:
             try:
-                self.proc.kill()
+                os.kill(self.PID)
             except Exception as err:
                 print("kill failed:", err)
 
@@ -110,15 +111,35 @@ class Openvpn:
         while self.status == RUNNING:
             print("create proc")
             print(self.status)
-            proc = await asyncio.create_subprocess_exec(
-                "sg", group, "-c", cmd,
+            self.pid_fp = os.path.join(self.folder_path, "pid.txt")
+            try:
+                os.remove(self.pid_fp)
+            except:
+                pass
+            shell = f"sg {group} -c \"echo \\$\\$ > {self.pid_fp}; {cmd}\""
+            print(shell)
+            proc = await asyncio.create_subprocess_shell(
+                shell,
                 stdout=asyncio.subprocess.PIPE,
                 stderr=asyncio.subprocess.PIPE)
+            print("started")
             self.proc = proc
-            self.PID = proc.pid
+            for i in range(3):
+                await asyncio.sleep(1)
+                got_pid = False
+                try:
+                    self.PID = open(self.pid_fp, "r").read()
+                    got_pid = True
+                except:
+                    got_pid = False
+                if got_pid:
+                    break
+            if not got_pid:
+                print("error, cannot get pid")
+                break
             self.openvpn_api = openvpn_api.VPN(
                 'localhost', int(self.management_port))
-            print(f"pid: {proc.pid}")
+            print(f"pid: {self.PID}")
             stdout, stderr = await proc.communicate()
             print(f'[{cmd!r} exited with {proc.returncode}]')
             if stdout: