Alain: *does* Panther "touch" the file (and update the file modification datestamp) when you rename it?
-J
jw schultz wrote:
On Sat, Dec 27, 2003 at 12:28:06PM +0100, alain content wrote:
Hi, I found this surprising behavior with rsync (version 2.5.7 protocol
version 26) on Mac OS X (Panther, 10.3.2) :
Suppose you have a folder "Source" containing a file named "abc", and its backup as folder "Clone", created by rsync :
rsync -a ~/Desktop/Source/ ~/Desktop/Clone
Now change the name of file "abc" into "ABC" and re-sync :
rsync -av ~/Desktop/Source/ ~/Desktop/Clone
building file list ... done wrote 141 bytes read 20 bytes 107.33 bytes/sec total size is 6148 speedup is 38.19
Not good : the change has not been done ! And suppose you do this: rsync -av --delete-after ~/Desktop/Source/ ~/Desktop/Clone
building file list ... done deleting a file named abc wrote 145 bytes read 20 bytes 330.00 bytes/sec total size is 6148 speedup is 37.26
Much worse, the file is not preserved in the backup. There is a workaround though :
rsync -av --delete ~/Desktop/Source/ ~/Desktop/Clone
building file list ... done deleting a file named abc ./ a file named ABC wrote 181 bytes read 36 bytes 434.00 bytes/sec total size is 6148 speedup is 28.33
However, the behavior is inconsistent and can result in incomplete copies or backups.
That sounds like a filesystem that preserves case but is insensitive to case.
Rsync uses lstat to see if a file exists. On case insensitive filesystems lstat("abc", buf) will succeed if the correct name is "ABC". In other words, it isn't rsync's fault if it believes the OS when the OS lies.
Case insensitive filesystems are not safe destinations for rsync because if two paths exist with only a difference in case ("Mail" and "mail") they will conflict.
There might be an option to mount the filesystem with case sensitivity turned on. Using that option would fix this problem.
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