merge d71476b9a55d from tip, use start_new_session instead of os.setsid.
diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py
index e369acb..415f12a 100644
--- a/Lib/webbrowser.py
+++ b/Lib/webbrowser.py
@@ -228,15 +228,9 @@
else:
# for TTY browsers, we need stdin/out
inout = None
- # if possible, put browser in separate process group, so
- # keyboard interrupts don't affect browser as well as Python
- setsid = getattr(os, 'setsid', None)
- if not setsid:
- setsid = getattr(os, 'setpgrp', None)
-
p = subprocess.Popen(cmdline, close_fds=True, stdin=inout,
stdout=(self.redirect_stdout and inout or None),
- stderr=inout, preexec_fn=setsid)
+ stderr=inout, start_new_session=True)
if remote:
# wait five secons. If the subprocess is not finished, the
# remote invocation has (hopefully) started a new instance.