Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Eric Blake
On 05/23/2016 10:56 AM, x y wrote: >> It is always possible to create file list with find and use that >> to tar whatever using --files-from=FILE option > >> I don't see the need to change tar behaviour to meet your wish. > > Hi Marco, > > Consider that you are working in the IT department of a

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Erik Soderquist
On Mon, May 23, 2016 at 4:40 AM, x y wrote: > Hello, > > The MS Office applications are changing the ctime value of .doc and > .xls files even if they are not modified. Opening and closing an > office file without modifying the content is changing ctime and the > unmodified document is included in

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread x y
>It is always possible to create file list with find and use that >to tar whatever using --files-from=FILE option >I don't see the need to change tar behaviour to meet your wish. Hi Marco, Consider that you are working in the IT department of a company and you have thousands of documents in your

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Marco Atzeri
On 23/05/2016 16:57, x y wrote: mtime is fakeable, ctime is not. Using only mtime makes it likely that your incremental backup will miss files. I don't have any good reason to differ from upstream behavior here. Hi Eric, The problem is not faking time stamps. Even commercial Windows backup p

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Vince Rice
> On Mon, May 23, 2016 at 5:29 PM, Eric Blake wrote: >> On 05/23/2016 03:18 AM, x y wrote: >>> It is not clear to me your expectation: >>> - are you asking how to use ctime to select the file with tar alone ? >>> It is not possible for my understanding of the manual. >>> >>> - Are you asking the

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread x y
>mtime is fakeable, ctime is not. Using only mtime makes it likely that >your incremental backup will miss files. I don't have any good reason >to differ from upstream behavior here. Hi Eric, The problem is not faking time stamps. Even commercial Windows backup programs are checking the modific

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Eric Blake
On 05/23/2016 03:18 AM, x y wrote: > It is not clear to me your expectation: > - are you asking how to use ctime to select the file with tar alone ? > It is not possible for my understanding of the manual. > > - Are you asking the package maintainer to change the behaviour of > cygwin tar ? Un

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread x y
It is not clear to me your expectation: - are you asking how to use ctime to select the file with tar alone ? It is not possible for my understanding of the manual. - Are you asking the package maintainer to change the behaviour of cygwin tar ? Unlikely to happen, but I leave to him. Regards

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Marco Atzeri
On 23/05/2016 10:54, x y wrote: Hi Marco, Thanks for your reply. The problem is that there are a lot of files to be checked so replacing ctime by time to support tar incremental backup should be more practical. Bottom post on this mailing list, please. It is not clear to me your expectation:

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread x y
Hi Marco, Thanks for your reply. The problem is that there are a lot of files to be checked so replacing ctime by time to support tar incremental backup should be more practical. On Mon, May 23, 2016 at 11:46 AM, Marco Atzeri wrote: > On 23/05/2016 10:40, x y wrote: >> >> Hello, >> >> The MS Off

Re: tar incremental backups and ctime‏ problem

2016-05-23 Thread Marco Atzeri
On 23/05/2016 10:40, x y wrote: Hello, The MS Office applications are changing the ctime value of .doc and .xls files even if they are not modified. Opening and closing an office file without modifying the content is changing ctime and the unmodified document is included in the incremental tar a

tar incremental backups and ctime‏ problem

2016-05-23 Thread x y
Hello, The MS Office applications are changing the ctime value of .doc and .xls files even if they are not modified. Opening and closing an office file without modifying the content is changing ctime and the unmodified document is included in the incremental tar archive. Could it be possible to us