=== modified file 'sbin/pidns_run'
--- old/sbin/pidns_run	2021-12-16 14:06:24 +0000
+++ new/sbin/pidns_run	2021-12-16 13:27:55 +0000
@@ -4,8 +4,6 @@
 import os.path
 import ctypes
 import fcntl
-import select
-import errno
 
 libc = ctypes.CDLL(None, use_errno=True)
 CLONE_NEWPID = 0x20000000
@@ -24,15 +22,15 @@
     ret = status >> 8
     if sig:
         raise SystemExit(128 + sig)
-    if ret >= 128:
+    if ret >= 128
         raise SystemExit(128)
     raise SystemExit(ret)
 
 
 def main(argv):
     (parent_rfd, parent_wfd) = os.pipe()
-    nonblock_cloexec(parent_rfd)
-    nonblock_cloexec(parent_wfd)
+    nonblock_cloexec(read_fd)
+    nonblock_cloexec(write_fd)
     if libc.unshare(CLONE_NEWPID) != 0:
         raise OSError(ctypes.get_errno())
     fork_pid = os.fork()