Problem backing up read-only files

[Alex Ferrara]

Hi Gary,

It looks like the problem occurs after rsync has transferred the file and is renaming the temporary file to the actual name. I am guessing that the HP media vault has Samba running on it, and it is actually denying access.

As a long show, you could try --inplace, which will mean rsync does not need to rename the file.

aF

On 23/07/2010, at 11:04 AM, Gary Johnson wrote:

> I have a PC on which I run Windows XP and Cygwin 1.5.  To this is
> attached an HP Media Vault mv2120 via Ethernet through a switch.
> I can copy files back and forth between the XP machine and the
> Media Vault, so that much seems to work fine.
> 
> I would like to use rsync to back up some of the files on the XP
> machine to the Media Vault.  This seems to work as it should as long
> as the files have write permission, but rsync fails to copy files
> that have only read permission.
> 
> To demonstrate this, I created an 'rstest' directory under my Cygwin
> home directory and created in it two files, one with default
> permissions and the other without write permissions.
> 
>    bash-3.2$ mkdir rstest
>    bash-3.2$ cd rstest
>    bash-3.2$ echo "hello, world" > rstest1.txt
>    bash-3.2$ echo "hello, world" > rstest2.txt
>    bash-3.2$ chmod -w rstest1.txt 
>    bash-3.2$ ll
>    total 2
>    -r--r--r-- 1 Gary Johnson None 13 Jul 22 17:02 rstest1.txt
>    -rw-r--r-- 1 Gary Johnson None 13 Jul 22 17:02 rstest2.txt
> 
> On the Media Vault, I created another 'rstest' directory.
> 
>    bash-3.2$ mkdir //hpmediavault/Documents/rstest
>    bash-3.2$ ll -d //hpmediavault/Documents/rstest
>    drwxr-xr-x 1 Gary Johnson None 0 Jul 22 17:04 //hpmediavault/Documents/rstest
> 
> Then I attempted to transfer both files to the 'rstest' directory on
> the Media Vault.
> 
>    bash-3.2$ rsync -avv * //hpmediavault/Documents/rstest
>    sending incremental file list
>    delta-transmission disabled for local transfer or --whole-file
>    rstest1.txt
>    rstest2.txt
>    rsync: rename "/hpmediavault/Documents/rstest/.rstest1.txt.uCmUNq" -> "rstest1.txt": Permission denied (13)
>    total: matches=0  hash_hits=0  false_alarms=0 data=26
> 
>    sent 188 bytes  received 50 bytes  476.00 bytes/sec
>    total size is 26  speedup is 0.11
>    rsync error: some files/attrs were not transferred (see previous errors) (code 23) at /home/lapo/packaging/rsync-3.0.4-1/src/rsync-3.0.4/main.c(1040) [sender=3.0.4]
>    bash-3.2$ ll //hpmediavault/Documents/rstest
>    total 1024
>    -rw-r--r-- 1 Gary Johnson None 13 Jul 22 17:02 rstest2.txt
> 
> I thought that I might be able to work around the problem by
> omitting the -a flag, which implies -p, but the results were
> exactly the same.
> 
> I am able to copy read-only files and preserve their permissions by
> using "tar cf" and "tar xf" in a pipeline, and that works fine for
> an initial backup, but for subsequent backups I really need a way to
> copy only those files that have changed.
> 
> What can I do to fix or work around this problem?
> 
> The version of rsync I'm using on Cygwin is
> 
>    rsync  version 3.0.4  protocol version 30
>    Copyright (C) 1996-2008 by Andrew Tridgell, Wayne Davison, and others.
>    Web site: http://rsync.samba.org/
>    Capabilities:
>        64-bit files, 64-bit inums, 32-bit timestamps, 64-bit long ints,
>        socketpairs, hardlinks, symlinks, no IPv6, batchfiles, inplace,
>        append, ACLs, no xattrs, iconv, symtimes
> 
> Regards,
> Gary
> 
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