tahoe-lafs/trac-2024-07-25
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Issues 1.1k Wiki Activity

tahoe backup loops on recursive links #850

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opened 2009-12-06 13:20:18 +00:00 by francois · 7 comments
francois commented 2009-12-06 13:20:18 +00:00
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francois@korn:~$ mkdir /tmp/test-backup/
francois@korn:~$ ln -s . /tmp/test-backup/test
francois@korn:~$ tahoe backup -v /tmp/test-backup tahoe:tmp
/usr/lib/pymodules/python2.6/foolscap/banana.py:2: [DeprecationWarning](wiki/DeprecationWarning): the sets module is deprecated
> import struct, sets, time
processing /tmp/test-backup, olddircap None
processing /tmp/test-backup/test, olddircap None
processing /tmp/test-backup/test/test, olddircap None
processing /tmp/test-backup/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None
Traceback (most recent call last):
> File "/usr/bin/tahoe", line 8, in <module>
    load_entry_point('allmydata-tahoe==1.5.0', 'console_scripts', 'tahoe')()
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 91, in run
    rc = runner(sys.argv[1:])
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 78, in runner
    rc = cli.dispatchcommand(so)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/cli.py", line 456, in backup
    rc = tahoe_backup.backup(options)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 370, in backup
    return bu.run()
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 212, in run
    new_backup_dircap = self.process(options.from_dir, latest_backup_dircap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process
    newchilddircap = self.process(childpath, oldchildcap)
> File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 268, in process
    raise [BackupProcessingError](wiki/BackupProcessingError)("Cannot backup this file %r" % childpath)
allmydata.scripts.tahoe_backup.BackupProcessingError: Cannot backup this file '/tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test'
francois@korn:~$
``` francois@korn:~$ mkdir /tmp/test-backup/ francois@korn:~$ ln -s . /tmp/test-backup/test francois@korn:~$ tahoe backup -v /tmp/test-backup tahoe:tmp /usr/lib/pymodules/python2.6/foolscap/banana.py:2: [DeprecationWarning](wiki/DeprecationWarning): the sets module is deprecated > import struct, sets, time processing /tmp/test-backup, olddircap None processing /tmp/test-backup/test, olddircap None processing /tmp/test-backup/test/test, olddircap None processing /tmp/test-backup/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None processing /tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test, olddircap None Traceback (most recent call last): > File "/usr/bin/tahoe", line 8, in <module> load_entry_point('allmydata-tahoe==1.5.0', 'console_scripts', 'tahoe')() > File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 91, in run rc = runner(sys.argv[1:]) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/runner.py", line 78, in runner rc = cli.dispatchcommand(so) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/cli.py", line 456, in backup rc = tahoe_backup.backup(options) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 370, in backup return bu.run() > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 212, in run new_backup_dircap = self.process(options.from_dir, latest_backup_dircap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 262, in process newchilddircap = self.process(childpath, oldchildcap) > File "/usr/lib/pymodules/python2.6/allmydata/scripts/tahoe_backup.py", line 268, in process raise [BackupProcessingError](wiki/BackupProcessingError)("Cannot backup this file %r" % childpath) allmydata.scripts.tahoe_backup.BackupProcessingError: Cannot backup this file '/tmp/test-backup/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test/test' francois@korn:~$ ```
tahoe-lafs added the
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 labels 2009-12-06 13:20:18 +00:00
tahoe-lafs added this to the undecided milestone 2009-12-06 13:20:18 +00:00
francois commented 2009-12-06 14:57:48 +00:00
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Attachment 850-fix-and-test.dpatch (26381 bytes) added

**Attachment** 850-fix-and-test.dpatch (26381 bytes) added
850-fix-and-test.dpatch
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zooko commented 2009-12-14 02:14:51 +00:00
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#104 (does cp -r work as expected?) was about this issue as well as a couple of others. Moving the loop issue from #104 to here.

#104 (does cp -r work as expected?) was about this issue as well as a couple of others. Moving the loop issue from #104 to here.
warner commented 2009-12-20 20:59:13 +00:00
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As #641 points out, if we could either skip symlinks or record them as symlinks (instead of following them), this would go away.

Francois: it looks like your patch only catches cycles of length one, right? I.e. if someone did ln -s .. foo or ln -s ../.. foo, then "tahoe backup" would still get stuck in a loop, yeah?

The more general solution (without fixing #641) would involve keeping a full list of every directory we'd ever started to process, and comparing the target of each symlinky child against that list, and bailing if it was found. That sounds like a lot of memory.

As #641 points out, if we could either skip symlinks or record them as symlinks (instead of following them), this would go away. Francois: it looks like your patch only catches cycles of length one, right? I.e. if someone did `ln -s .. foo` or `ln -s ../.. foo`, then "tahoe backup" would still get stuck in a loop, yeah? The more general solution (without fixing #641) would involve keeping a full list of every directory we'd ever started to process, and comparing the target of each symlinky child against that list, and bailing if it was found. That sounds like a lot of memory.
davidsarah commented 2009-12-20 21:03:15 +00:00
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Replying to zooko:

#104 (does cp -r work as expected?) was about this issue as well as a couple of others.

I don't think it's the same issue. This is only about recursive symlinks in the local filesystem. cp -r needs to handle loops both in the Tahoe and local filesystems. As Brian says, the only way to do that correctly in general is to keep track of the mutable directory storage indices (for the Tahoe fs) or the inode numbers (for the local fs) that you've already seen.

Replying to [zooko](/tahoe-lafs/trac-2024-07-25/issues/850#issuecomment-115501): > #104 (does cp -r work as expected?) was about this issue as well as a couple of others. I don't think it's the same issue. This is only about recursive symlinks in the local filesystem. `cp -r` needs to handle loops both in the Tahoe and local filesystems. As Brian says, the only way to do that correctly in general is to keep track of the mutable directory storage indices (for the Tahoe fs) or the inode numbers (for the local fs) that you've already seen.
francois commented 2009-12-27 21:31:37 +00:00
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Replying to warner:

Francois: it looks like your patch only catches cycles of length one, right? I.e. if someone did ln -s .. foo or ln -s ../.. foo, then "tahoe backup" would still get stuck in a loop, yeah?

Yes, Brian, you're right, this fix is wrong. Can someone with the necessary trac permissions delete this patch from the ticket ?

Replying to [warner](/tahoe-lafs/trac-2024-07-25/issues/850#issuecomment-115502): > Francois: it looks like your patch only catches cycles of length one, right? I.e. if someone did `ln -s .. foo` or `ln -s ../.. foo`, then "tahoe backup" would still get stuck in a loop, yeah? Yes, Brian, you're right, this fix is wrong. Can someone with the necessary trac permissions delete this patch from the ticket ?
warner commented 2009-12-27 21:59:46 +00:00
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eh, I think it's fine to leave it there: no harm in having well-labeled experiments lying around :)

I don't know how to fix this in general. I suspect it will require having explicit support for symlinks in tahoe (#641), at least the ability to copy the symlink target name into a tahoe file-like object and then copy it back out again. A short-term fix (again #641, also #729) would be to let you skip over symlinks.. that's what I've been doing for my personal backups.

eh, I think it's fine to leave it there: no harm in having well-labeled experiments lying around :) I don't know how to fix this in general. I suspect it will require having explicit support for symlinks in tahoe (#641), at least the ability to copy the symlink target name into a tahoe file-like object and then copy it back out again. A short-term fix (again #641, also #729) would be to let you skip over symlinks.. that's what I've been doing for my personal backups.
warner commented 2010-01-27 22:54:30 +00:00
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changeset:e769bbb6dd41d40c fixes this, by skipping over all symlinks (with a warning).

changeset:e769bbb6dd41d40c fixes this, by skipping over all symlinks (with a warning).
tahoe-lafs added the
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tahoe-lafs modified the milestone from undecided to 1.6.0 2010-01-27 22:54:30 +00:00
warner closed this issue 2010-01-27 22:54:30 +00:00
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