Re: [rdiff-backup-users] Error When Backing up to samba share on ubuntu 8.10 via smbfs on Mac OS X

[Nathan Aschbacher]

Hi Andrew,

Sorry for the delay.  I tried to run it with 1.3.3 and here's what I  
got:

HotPlate:~ nathan$ rdiff-backup -v 5 ~/Desktop/ /Volumes/Insurance/ 
Backup/
Using rdiff-backup version 1.3.3
Unable to import module posix1e from pylibacl package.
POSIX ACLs not supported on filesystem at /Users/nathan/Desktop
Unable to import win32security module. Windows ACLs
not supported by filesystem at /Users/nathan/Desktop
-----------------------------------------------------------------
Detected abilities for source (read only) file system:
  Access control lists                         Off
  Extended attributes                          On
  Windows access control lists                 Off
  Case sensitivity                             Off
  Escape DOS devices                           Off
  Escape trailing spaces                       Off
  Mac OS X style resource forks                On
  Mac OS X Finder information                  On
-----------------------------------------------------------------
Warning: hard linking not supported by filesystem at /Volumes/ 
Insurance/Backup/rdiff-backup-data
Unable to import module posix1e from pylibacl package.
POSIX ACLs not supported on filesystem at /Volumes/Insurance/Backup/ 
rdiff-backup-data/rdiff-backup.tmp.0
Unable to import win32security module. Windows ACLs
not supported by filesystem at /Volumes/Insurance/Backup/rdiff-backup- 
data/rdiff-backup.tmp.0
Exception '[Errno 2] No such file or directory: '/Volumes/Insurance/ 
Backup/rdiff-backup-data/rdiff-backup.tmp.0/symlinked_file2'' raised  
of class '<type 'exceptions.OSError'>':
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 306, in  
error_check_Main
    try: Main(arglist)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 326, in Main
    take_action(rps)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 282, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 336, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/fs_abilities.py", line 959, in  
backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/fs_abilities.py", line 171, in  
init_readwrite
    subdir.delete()
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/rpath.py", line 1070, in delete
    self.conn.shutil.rmtree(self.path)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/shutil.py", line 221, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/shutil.py", line 219, in rmtree
    os.remove(fullname)

Traceback (most recent call last):
  File "/usr/local/bin/rdiff-backup", line 30, in <module>
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 306, in  
error_check_Main
    try: Main(arglist)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 326, in Main
    take_action(rps)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 282, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/Main.py", line 336, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/fs_abilities.py", line 959, in  
backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/fs_abilities.py", line 171, in  
init_readwrite
    subdir.delete()
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/site-packages/rdiff_backup/rpath.py", line 1070, in delete
    self.conn.shutil.rmtree(self.path)
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/shutil.py", line 221, in rmtree
    onerror(os.remove, fullname, sys.exc_info())
  File "/Library/Frameworks/Python.framework/Versions/2.6/lib/ 
python2.6/shutil.py", line 219, in rmtree
    os.remove(fullname)
OSError: [Errno 2] No such file or directory: '/Volumes/Insurance/ 
Backup/rdiff-backup-data/rdiff-backup.tmp.0/symlinked_file2'

Now the interesting thing is that I think I know what the problem is,  
but I have no idea how to fix it.  When I run a little test like the  
following:

$ cd /Volumes/Insurance/Backup
$ touch src
$ ln -s src tgt
$ rm tgt
$ rm src

The "rm tgt" fails, well not exactly.  It runs without an error the  
first time, but some kind of problem occurs on OS X where the file  
won't stay deleted, it immediately reappears.  Once it reappears two  
problems occur.  First, if you try to delete it again the system  
claims it doesn't exist, secondly any check that looks to see if the  
directory is empty will fail (because "ls" still returns tgt).  The  
symlink "tgt" has to be delete by logging into the Samba server.  If I  
connect to the same share from an Ubuntu desktop and try the same set  
of operations through the GUI it won't let me even create the symlink,  
claiming that the target volume doesn't support it.  It seems like  
there's some very strange interaction occurring between Mac OS X and  
the Samba share.  You gotta love Apple's spectacularly bad Samba  
implementation.

-Nathan



On Mar 23, 2009, at 8:02 AM, Andrew Ferguson wrote:

> On Mar 20, 2009, at 6:44 PM, Nathan Aschbacher wrote:
> > I've tried several versions of rdiff-backup (up through 1.3.3) and  
> > several versions of Python (up through 2.6.1).  I believe the  
> > issues relates to symbolic links based on the error.  It seems to  
> > fail when doing its destination capability tests when it fails to  
> > delete the temp symlink.  When I go and look at what rdiff-backup  
> > creates before dying the file "/Volumes/For_Rent/Desktop/rdiff- 
> > backup-data/rdiff-backup.tmp.0/symlinked_file2" is a broken symlink  
> > to a file "symlinked_file1" that doesn't exist.
> >
> > Backups over SSH, using sshfs and MacFUSE, and to the local HD all  
> > work fine.  So this seems like a strange interaction between rdiff- 
> > backup and Samba.
> >
> > Whenever I try to perform a backup to the samba share on my  
> > fileserver over smbfs from my Macbook I get the following error:
> >
> > Nathans-MacBook:~ nathan$ rdiff-backup --force -v5 ~/Desktop/ / 
> > Volumes/For_Rent/Desktop/
> >
> > Using rdiff-backup version 1.2.2
>
>
> Hmm, I know you specified that you tried several versions, but can  
> you paste the output from the latest version?
>
> There were specific changes in 1.2.3 related exactly to the problem  
> you are experiencing. That doesn't mean that the problem will go  
> away, but I think the error should be different.
>
>
>
> thanks,
> Andrew
>
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