[rdiff-backup-users] No Permission IOError

[Dean Cording]

I'm running rdiff-backup to backup my Linux machine to another via a NFS mount.

A program I use creates a couple of lock files with no permissions:

----------  2 dean dean     0 2009-03-07 09:01 Succurro 
Accounts.7f0100.15504.LNK
----------  2 dean dean     0 2009-03-07 09:01 Succurro Accounts.LCK

rdiff-backup backs these up OK but when it comes to do the next backup it fails 
with:

Exception '[Errno 13] Permission denied: 
'/mnt/backup/holly/data/Work/Succurro/Finances/Succurro 
Accounts.7f0100.15504.LNK'' raised of class '<type 'exceptions.IOError'>':
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 304, in 
error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 324, in 
Main
    take_action(rps)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 280, in 
take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 343, in 
Backup
    backup.Mirror_and_increment(rpin, rpout, incdir)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 51, in 
Mirror_and_increment
    DestS.patch_and_increment(dest_rpath, source_diffiter, inc_rpath)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 241, in 
patch_and_increment
    for diff in rorpiter.FillInIter(source_diffiter, dest_rpath):
  File "/usr/lib/python2.5/site-packages/rdiff_backup/rorpiter.py", line 177, 
in FillInIter
    for rp in rpiter:
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 103, in 
get_diffs
    for dest_sig in dest_sigiter:
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 178, in 
get_sigs
    src_rorp, dest_rorp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 193, in 
get_one_sig
    sig_fp = cls.get_one_sig_fp(dest_rp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 212, in 
get_one_sig_fp
    return Rdiff.get_signature(dest_rp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Rdiff.py", line 31, in 
get_signature
    return librsync.SigFile(rp.open("rb"), blocksize)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/rpath.py", line 1174, in 
open
    else: return open(self.path, mode)

Traceback (most recent call last):
  File "/usr/bin/rdiff-backup", line 30, in <module>
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 304, in 
error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 324, in 
Main
    take_action(rps)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 280, in 
take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Main.py", line 343, in 
Backup
    backup.Mirror_and_increment(rpin, rpout, incdir)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 51, in 
Mirror_and_increment
    DestS.patch_and_increment(dest_rpath, source_diffiter, inc_rpath)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 241, in 
patch_and_increment
    for diff in rorpiter.FillInIter(source_diffiter, dest_rpath):
  File "/usr/lib/python2.5/site-packages/rdiff_backup/rorpiter.py", line 177, 
in FillInIter
    for rp in rpiter:
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 103, in 
get_diffs
    for dest_sig in dest_sigiter:
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 178, in 
get_sigs
    src_rorp, dest_rorp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 193, in 
get_one_sig
    sig_fp = cls.get_one_sig_fp(dest_rp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/backup.py", line 212, in 
get_one_sig_fp
    return Rdiff.get_signature(dest_rp)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/Rdiff.py", line 31, in 
get_signature
    return librsync.SigFile(rp.open("rb"), blocksize)
  File "/usr/lib/python2.5/site-packages/rdiff_backup/rpath.py", line 1174, in 
open
    else: return open(self.path, mode)
IOError: [Errno 13] Permission denied: 
'/mnt/backup/holly/data/Work/Succurro/Finances/Succurro 
Accounts.7f0100.15504.LNK'


I've tried changing the permissions on the backuped up files but because it 
failed part way through a backup, when I run rdiff-backp again it regresses the 
previous failed backup and resets the file permissions.  As a result, the next 
backup fails again and I am unable to do any more backups.

How can I clear this problem and prevent it from happening again?

Thanks,

Dean