From 0df5a6c6c8998dd8357e70876a15e4d9df0965fd Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 4 Jun 2022 14:14:24 +0530
Subject: [PATCH] Utility function to test if PID is alive

---
 kitty/utils.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/kitty/utils.py b/kitty/utils.py
index d82a47ade..1ce99abb2 100644
--- a/kitty/utils.py
+++ b/kitty/utils.py
@@ -1002,3 +1002,13 @@ def less_version(less_exe: str = 'less') -> int:
     if m is None:
         raise ValueError(f'Invalid version string for less: {o}')
     return int(m.group(1))
+
+
+def is_pid_alive(pid: int) -> bool:
+    try:
+        os.kill(pid, 0)
+    except ProcessLookupError:
+        return False
+    except Exception:
+        pass
+    return True