[gentoo-portage-dev] [PATCH] NewsManager.getUnreadItems: handle EROFS (490732)

[Zac Medico]

When getUnreadItems tries to lock the news.unread file, it's safe to
ignore EROFS. This is handled with a ReadOnlyFileSystem exception
raised from the portage.locks.lockfile function.

X-Gentoo-Bug: 490732
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=490732
---
 pym/portage/exception.py | 1 +
 pym/portage/locks.py     | 7 ++++++-
 pym/portage/news.py      | 7 ++++---
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/pym/portage/exception.py b/pym/portage/exception.py
index ef62e7a..857a727 100644
--- a/pym/portage/exception.py
+++ b/pym/portage/exception.py
@@ -133,6 +133,7 @@ class AlarmSignal(TimeoutException):
 
 class ReadOnlyFileSystem(PortageException):
 	"""Read-only file system"""
+	from errno import EROFS as errno
 
 class CommandNotFound(PortageException):
 	"""A required binary was not available or executable"""
diff --git a/pym/portage/locks.py b/pym/portage/locks.py
index 0789f89..0b0f74b 100644
--- a/pym/portage/locks.py
+++ b/pym/portage/locks.py
@@ -16,7 +16,8 @@ import warnings
 import portage
 from portage import os, _encodings, _unicode_decode
 from portage.exception import DirectoryNotFound, FileNotFound, \
-	InvalidData, TryAgain, OperationNotPermitted, PermissionDenied
+	InvalidData, TryAgain, OperationNotPermitted, PermissionDenied, \
+	ReadOnlyFileSystem
 from portage.util import writemsg
 from portage.localization import _
 
@@ -110,6 +111,8 @@ def lockfile(mypath, wantnewlockfile=0, unlinkfile=0,
 					raise OperationNotPermitted(func_call)
 				elif e.errno == PermissionDenied.errno:
 					raise PermissionDenied(func_call)
+				elif e.errno == ReadOnlyFileSystem.errno:
+					raise ReadOnlyFileSystem(func_call)
 				else:
 					raise
 
@@ -404,6 +407,8 @@ def hardlink_lockfile(lockfilename, max_wait=DeprecationWarning,
 				raise OperationNotPermitted(func_call)
 			elif e.errno == PermissionDenied.errno:
 				raise PermissionDenied(func_call)
+			elif e.errno == ReadOnlyFileSystem.errno:
+				raise ReadOnlyFileSystem(func_call)
 			else:
 				raise
 		else:
diff --git a/pym/portage/news.py b/pym/portage/news.py
index 0d72b00..7bdf716 100644
--- a/pym/portage/news.py
+++ b/pym/portage/news.py
@@ -1,5 +1,5 @@
 # portage: news management code
-# Copyright 2006-2013 Gentoo Foundation
+# Copyright 2006-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 from __future__ import print_function, unicode_literals
@@ -28,7 +28,7 @@ from portage.localization import _
 from portage.locks import lockfile, unlockfile
 from portage.output import colorize
 from portage.exception import InvalidLocation, OperationNotPermitted, \
-	PermissionDenied
+	PermissionDenied, ReadOnlyFileSystem
 
 class NewsManager(object):
 	"""
@@ -180,7 +180,8 @@ class NewsManager(object):
 		unread_lock = None
 		try:
 			unread_lock = lockfile(unread_filename, wantnewlockfile=1)
-		except (InvalidLocation, OperationNotPermitted, PermissionDenied):
+		except (InvalidLocation, OperationNotPermitted, PermissionDenied.
+			ReadOnlyFileSystem):
 			pass
 		try:
 			try:
-- 
2.0.4