examples/netnsslirp.py: simplify termination of slirp4netns

1 files changed, 2 insertions, 7 deletions

diff --git a/examples/netnsslirp.py b/examples/netnsslirp.py
index 0818fba..7a1a27e 100755
--- a/examples/netnsslirp.py
+++ b/examples/netnsslirp.py
@@ -6,6 +6,7 @@
 """
 
 import os
+import signal
 import sys
 
 if __file__.split("/")[-2:-1] == ["examples"]:
@@ -16,14 +17,11 @@ import linuxnamespaces
 
 def main() -> None:
     mainpid = os.getpid()
-    rfd, wfd = os.pipe()
     if os.fork() == 0:
-        os.set_inheritable(rfd, True)
+        linuxnamespaces.prctl_set_pdeathsig(signal.SIGTERM)
         os.execlp(
             "slirp4netns",
             "slirp4netns",
-            "--exit-fd",
-            "%d" % rfd,
             "--configure",
             "--disable-host-loopback",
             "%d" % mainpid,
@@ -35,9 +33,6 @@ def main() -> None:
         0,
         linuxnamespaces.CloneFlags.NEWUSER | linuxnamespaces.CloneFlags.NEWNET,
     )
-    # Leave write end of --exit-fd behind as fd 252.
-    os.dup2(wfd, 252)
-    os.close(wfd)
     os.execlp(os.environ["SHELL"], os.environ["SHELL"])