Fwd: --link-dest does not appear to be linking on Cygwin

[Clint Olsen]

Hi:

I will try the itemize switch as you suggested, thanks...

I have tested this on both the Windows box and the NAS. The inode
numbers come back differently on Cygwin but the NAS sees them as the
same:

Nancy at macki /cygdrive/f/macki/test
$ ls -ali
total 1048576
 3297336581512553257 drwxr-xr-x 1 Nancy None 0 Jun  5 11:37 .
16963795924520120485 drwxr-xr-x 1 Nancy None 0 Jun  5 14:07 ..
 5321094878451953619 -rw-r--r-- 1 Nancy None 4 Jun  5 10:57 foo
 9211568837569774878 -rw-r--r-- 1 Nancy None 4 Jun  5 10:57 foo1
 9211568837569774879 -rw-r--r-- 1 Nancy None 4 Jun  5 10:57 foo2
 3595967447105090765 -rw-r--r-- 1 Nancy None 4 Jun  5 10:57 foolink

NAS> cd /volume1/Backup/macki/test/
NAS> ls -ali
16678913 drwxrwxrwx    2 nancy    users         4096 Jun  5 11:37 .
8814593 drwxrwxrwx    5 nancy    users         4096 Jun  5 14:07 ..
16678915 -rwxrwxrwx    4 nancy    users            4 Jun  5 10:57 foo
16678915 -rwxrwxrwx    4 nancy    users            4 Jun  5 10:57 foo1
16678915 -rwxrwxrwx    4 nancy    users            4 Jun  5 10:57 foo2
16678915 -rwxrwxrwx    4 nancy    users            4 Jun  5 10:57 foolink

The final file "foolink" was created using a C program ala:

$ cat link.c
#include <unistd.h>
#include <stdio.h>

int main(void)
{
    if (link("/cygdrive/f/macki/test/foo",
"/cygdrive/f/macki/test/foolink") == 0) {
        printf("Link was successful\n");
    } else {
        printf("Link was not successful\n");
    }
    return 0;
}

Thanks,

-Clint

On Tue, Jun 5, 2012 at 2:06 PM, Kevin Korb <kmk at sanitarium.net> wrote:
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>
> - --itemize-changes would be the first place to start.  Also, see if you
> can make a hard link on your NAS.  Just because the underlying ext4
> supports it doesn't mean that your network mount does.  Try something
> like:
>
> cd /cygdrive/f/macki
> touch testfile
> ln testfile testfile2
> ls -ls testfile testfile2
>
> They should both have the same inode number.
>
> On 06/05/12 17:02, Clint Olsen wrote:
>> Hi:
>>
>> I have attempted to following some instructions to use --link-dest
>> in order to preserve space for multiple backups. I'm using rsync
>> on Cygwin with a NAS (ext4) which does support hard-links on the
>> filesystem. I've written a short program that does attempt to
>> create a hard-link on this NAS from Cygwin and it does look to be
>> working. If I run ls -li on the NAS the inodes are the same.
>> However, on Cygwin the inodes returned are not. I assumed that
>> what's important is that the NAS handles the hard-links correctly.
>>
>> I checked the archives and it looks like a common mistake is
>> inconsistent usage of the trailing backslash. My usage looks
>> something like:
>>
>> % rsync -aP --delete --delete-excluded
>> --exclude-from=/home/Nancy/.rsync/exclude
>> --link-dest=/cygdrive/f/macki/current/ Nancy
>> /cygdrive/f/macki/incomplete-back-2012-06-05T13:53:51
>>
>> I'm running this from "/cygwin/c/Documents and Settings/"
>> directory, and the directory under the symlink "current" is
>> "Nancy".
>>
>> Is there a way to tell if rsync thinks it's found a match and
>> attempting to link?
>>
>> Thanks,
>>
>> -Clint
>
> - --
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>        Kevin Korb                      Phone:    (407) 252-6853
>        Systems Administrator           Internet:
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>        Orlando, Florida                kmk at sanitarium.net (personal)
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