#11306: Treat EROFS like EACCES when making a 'file is read-only' decision
diff --git a/Lib/mailbox.py b/Lib/mailbox.py
index 2a0d321..ace1709 100644
--- a/Lib/mailbox.py
+++ b/Lib/mailbox.py
@@ -578,7 +578,7 @@
f = open(self._path, 'wb+')
else:
raise NoSuchMailboxError(self._path)
- elif e.errno == errno.EACCES:
+ elif e.errno in (errno.EACCES, errno.EROFS):
f = open(self._path, 'rb')
else:
raise
@@ -2002,7 +2002,7 @@
try:
fcntl.lockf(f, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError as e:
- if e.errno in (errno.EAGAIN, errno.EACCES):
+ if e.errno in (errno.EAGAIN, errno.EACCES, errno.EROFS):
raise ExternalClashError('lockf: lock unavailable: %s' %
f.name)
else:
@@ -2012,7 +2012,7 @@
pre_lock = _create_temporary(f.name + '.lock')
pre_lock.close()
except IOError as e:
- if e.errno == errno.EACCES:
+ if e.errno in (errno.EACCES, errno.EROFS):
return # Without write access, just skip dotlocking.
else:
raise