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Date: Mon, 27 Jun 2005 09:33:33 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Allan WIlkins <devnull4spam AT yahoo DOT co DOT uk>
cc: cygwin AT cygwin DOT com
Subject: Re: find -newer problem
In-Reply-To: <42BFE607.2070804@yahoo.co.uk>
Message-ID: <Pine.GSO.4.61.0506270916560.10029@slinky.cs.nyu.edu>
References: <42BFE607 DOT 2070804 AT yahoo DOT co DOT uk>
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On Mon, 27 Jun 2005, Allan WIlkins wrote:

> I must apologise if this is an already known problem but I have been
> unable to locate any reference to it in the mail archives.
>
> Executing a find using the -newer parameter returns files that appear to
> be of the same age. e.g.
>
> $ find XXX -newer YYY
> XXX
> $ ls -l XXX YYY
> -r--r--r--  1 allanw Domain Users 10291 Jun 27 10:38 XXX
> -r--r--r--  1 allanw Domain Users  5865 Jun 27 10:38 YYY
> $ ls -lu XXX YYY
> -r--r--r--  1 allanw Domain Users 10291 Jun 27 00:00 XXX
> -r--r--r--  1 allanw Domain Users  5865 Jun 27 00:00 YYY
> $ ls -lc XXX YYY
> -r--r--r--  1 allanw Domain Users 10291 Jun 27 12:21 XXX
> -r--r--r--  1 allanw Domain Users  5865 Jun 27 12:21 YYY
>
> However:
> $ touch AAA BBB
> $ find AAA -newer BBB
> $ ls -l AAA BBB
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 12:11 AAA
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 12:11 BBB
> $ ls -lc AAA BBB
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 12:11 AAA
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 12:11 BBB
> $ ls -lu AAA BBB
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 00:00 AAA
> -rw-r--r--  1 allanw Domain Users 0 Jun 27 00:00 BBB
> So if the files are created using touch the find does not return anything.
>
> I understand that ls -l displays the last modification time. Is the find
> using the same date?

find *is* using the same date, but you may be running into filesystem
granularity issues.  FAT, for example, stores dates with the granularity
of 2 seconds.  You may also want to try "test AAA -nt BBB" and "test BBB
-nt AAA", to see whether you get results that are consistent with "find".

> Thanks in advance
> Al
>
> The output of a cygcheck -s -v -r > cygcheck.out follows
> ====================================================
> [snip cygcheck output]
> [snip *another* cygcheck output]

In the future, please *attach* the output of "cygcheck -svr" instead of
including it in-line.  It cuts down on false positive matches in archive
searches.

HTH,
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

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