[patch] fix EOPNOTSUPP for copy2/copystat in python2.6

[John Hein]

>Submitter-Id:	current-users
>Originator:	John Hein
>Organization:
>Confidential:	no <FreeBSD PRs are public data>
>Synopsis:	[patch] fix EOPNOTSUPP for copy2/copystat in python2.6
>Severity:	non-critical
>Priority:	medium
>Category:	ports
>Class:		sw-bug
>Release:
>Environment:


>Description:

shutil.copystat() can generate an exception when the source is FreeBSD and
the destination is a filesystem that does not support chflags(2)
(e.g., nfs, zfs).

Also affected is shutil.copy2() which calls copystat().

This also affects various operations in mercurial which uses copy2.


>How-To-Repeat:

touch /tmp/file-on-freebsd-ufs
python -c 'import shutil; shutil.copy2("/tmp/file-on-freebsd-ufs", "/dest/nfs/mount/.")'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/site/dist/python/lib/python2.6/shutil.py", line 100, in copy2
    copystat(src, dst)
  File "/site/dist/python/lib/python2.6/shutil.py", line 77, in copystat
    os.chflags(dst, st.st_flags)
OSError: [Errno 45] Operation not supported: '/dest/nfs/mount/./file-on-freebsd-ufs'

>Fix:

This is not needed for lang/python25 where copystat does not
try to copy the flags.

Index: Makefile
===================================================================
RCS file: /base/FreeBSD-CVS/ports/lang/python26/Makefile,v
retrieving revision 1.167
diff -u -p -r1.167 Makefile
--- Makefile	19 Jul 2010 21:59:27 -0000	1.167
+++ Makefile	27 Jul 2010 16:54:18 -0000
@@ -6,7 +6,7 @@
 
 PORTNAME=	python26
 PORTVERSION=	2.6.5
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	lang python ipv6
 MASTER_SITES=	${PYTHON_MASTER_SITES}
 MASTER_SITE_SUBDIR=	${PYTHON_MASTER_SITE_SUBDIR}
Index: files/patch-copystat
===================================================================
RCS file: files/patch-copystat
diff -N files/patch-copystat
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ files/patch-copystat	27 Jul 2010 16:53:46 -0000
@@ -0,0 +1,41 @@
+# $FreeBSD$
+
+Work around 'Operation not supported' issues when using copystat()
+(and copy2() which calls copystat()) to a filesystem destination
+that does not support chflags(2) (e.g., nfs, zfs).
+
+http://bugs.python.org/issue7512
+
+This has already been applied upstream and 2.7 has it already.
+
+http://svn.python.org/view/python/branches/release26-maint/Lib/shutil.py?view=diff&pathrev=79300&r1=79299&r2=79300
+
+Also affects mercurial...
+
+http://www.selenic.com/pipermail/mercurial/2010-March/030716.html
+
+diff -r 4207e9a39b78 Lib/shutil.py
+--- a/Lib/shutil.py	Tue Dec 15 03:25:27 2009 +0000
++++ b/Lib/shutil.py	Tue Dec 15 15:25:31 2009 +0800
+@@ -9,6 +9,7 @@
+ import stat
+ from os.path import abspath
+ import fnmatch
++import errno
+ 
+ __all__ = ["copyfileobj","copyfile","copymode","copystat","copy","copy2",
+            "copytree","move","rmtree","Error", "SpecialFileError"]
+@@ -88,8 +89,11 @@
+     if hasattr(os, 'chmod'):
+         os.chmod(dst, mode)
+     if hasattr(os, 'chflags') and hasattr(st, 'st_flags'):
+-        os.chflags(dst, st.st_flags)
+-
++        try:
++            os.chflags(dst, st.st_flags)
++        except OSError, why:
++            if not hasattr(errno, 'EOPNOTSUPP') or why.errno != errno.EOPNOTSUPP:
++                raise
+ 
+ def copy(src, dst):
+     """Copy data and mode bits ("cp src dst").