From 4cc3db2b37e3a0ee123f9c9c81aba56be543b383 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Thu, 22 Nov 2012 04:23:20 -0800
Subject: EventLoop: handle Linux 2.4 errno 38 for epoll

---
 pym/portage/util/_eventloop/EventLoop.py | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

(limited to 'pym/portage/util')

diff --git a/pym/portage/util/_eventloop/EventLoop.py b/pym/portage/util/_eventloop/EventLoop.py
index 15d4ef214..17a468f28 100644
--- a/pym/portage/util/_eventloop/EventLoop.py
+++ b/pym/portage/util/_eventloop/EventLoop.py
@@ -53,9 +53,28 @@ class EventLoop(object):
 		self._timeout_handlers = {}
 		self._timeout_interval = None
 
+		self._poll_obj = None
 		try:
 			select.epoll
 		except AttributeError:
+			pass
+		else:
+			try:
+				epoll_obj = select.epoll()
+			except IOError:
+				# This happens with Linux 2.4 kernels:
+				# IOError: [Errno 38] Function not implemented
+				pass
+			else:
+				self._poll_obj = _epoll_adapter(epoll_obj)
+				self.IO_ERR = select.EPOLLERR
+				self.IO_HUP = select.EPOLLHUP
+				self.IO_IN = select.EPOLLIN
+				self.IO_NVAL = 0
+				self.IO_OUT = select.EPOLLOUT
+				self.IO_PRI = select.EPOLLPRI
+
+		if self._poll_obj is None:
 			self._poll_obj = create_poll_instance()
 			self.IO_ERR = PollConstants.POLLERR
 			self.IO_HUP = PollConstants.POLLHUP
@@ -63,14 +82,6 @@ class EventLoop(object):
 			self.IO_NVAL = PollConstants.POLLNVAL
 			self.IO_OUT = PollConstants.POLLOUT
 			self.IO_PRI = PollConstants.POLLPRI
-		else:
-			self._poll_obj = _epoll_adapter(select.epoll())
-			self.IO_ERR = select.EPOLLERR
-			self.IO_HUP = select.EPOLLHUP
-			self.IO_IN = select.EPOLLIN
-			self.IO_NVAL = 0
-			self.IO_OUT = select.EPOLLOUT
-			self.IO_PRI = select.EPOLLPRI
 
 		self._child_handlers = {}
 		self._sigchld_read = None
-- 
cgit v1.2.3-1-g7c22