Re: Need way to set the Creation date of a file via OSX
Re: Need way to set the Creation date of a file via OSX
- Subject: Re: Need way to set the Creation date of a file via OSX
- From: "Mark J. Reed" <email@hidden>
- Date: Sat, 21 May 2005 21:05:45 -0400
chmod/chown don't let you set the creation time directly, but when you
use them to change the mode or owner (or use chgrp to change the group,
or ln to create another hard link to the file, or do anything else that
affects the file's metadata, that updates the ctime to the time of the
change.
At least, that's how it's supposed to work. But on Tiger HFS+ the
ctime seems to change every time the mtime does... which confuses me.
Here's an example from a Linux system:
I was mistaken; I should have known better. Any time you change
the metadata associated with a file, the ctime is updated. That
includes changing the modification time, so any time the mtime changes,
the ctime does as well. It's not in any way a creation
time; it's a change time. I had the relationship backwards as far
as which one changes more often.
The ctime will change when the mtime doesn't - when the file mode is
changed with chmod, or the owner with chown, or the group with chgrp,
or the number of links with chgrp, etc. Those actions don't
change the modification time, because the file contents don't change,
but they do change the ctime.
On 5/21/05, cris <email@hidden> wrote:
On May 18, 2005, at 1:07 PM, Mark J. Reed wrote:
> touch doesn't change the ctime either, unless you're using a
> version that supports that as a special option and supply said
> option. chmod and chown, however, do. ctime is basically the
> mtime for the inode.
Can you give an example how changing the creation date should work
with chmod/chown?
Greetings
cris
--
Mark J. Reed <
email@hidden>
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