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From: Glenn Maynard <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: coreutils: cp --preserve=timestamps -u copies repeatedly
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Date: Sun, 21 Mar 2004 21:10:46 -0500
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Package: coreutils
Version: 5.0.91-2
Severity: normal
08:38pm [EMAIL PROTECTED]/3 [~] touch test
08:38pm [EMAIL PROTECTED]/3 [~] cp --preserve=timestamps -u -v test test2
`test' -> `test2'
08:38pm [EMAIL PROTECTED]/3 [~] ls -l test test2
-rw-r--r-- 1 glenn users 0 Mar 21 20:38 test
-rw-r--r-- 1 glenn users 0 Mar 21 20:38 test2
08:38pm [EMAIL PROTECTED]/3 [~] cp --preserve=timestamps -u -v test test2
`test' -> `test2'
08:38pm [EMAIL PROTECTED]/3 [~] cp --preserve=timestamps -u -v test test2
`test' -> `test2'
It's copying the file, even though it has the same timestamp.
This is because --preserve=timestamps is only copying timestamps to the
microsecond (all utimes() handles), but -u compares timestamps to the
nanosecond. The newly created file is having its timestamp truncated,
so -u always thinks the file is out of date.
I'd suggest the lesser evil would be for -u to only compare timestamps
to the microsecond.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.0
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8
Versions of packages coreutils depends on:
ii libacl1 2.2.23-1 Access control list shared library
ii libattr1 2.4.15-1 Extended attribute shared library
ii libc6 2.3.2.ds1-11 GNU C Library: Shared libraries an
-- no debconf information
---------------------------------------
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Date: Wed, 21 Dec 2005 13:50:56 +0100
From: Thomas Hood <[EMAIL PROTECTED]>
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To: [EMAIL PROTECTED]
Subject: Done in 5.93
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version=2.60-bugs.debian.org_2005_01_02
[EMAIL PROTECTED]:/tmp/w$ touch test
[EMAIL PROTECTED]:/tmp/w$ cp --preserve=timestamps -u -v test test2
`test' -> `test2'
[EMAIL PROTECTED]:/tmp/w$ ls -l test test2
-rw-r--r-- 1 jdthood jdthood 0 2005-12-21 13:49 test
-rw-r--r-- 1 jdthood jdthood 0 2005-12-21 13:49 test2
[EMAIL PROTECTED]:/tmp/w$ ls -l --full-time
total 0
-rw-r--r-- 1 jdthood jdthood 0 2005-12-21 13:49:11.000000000 +0100 test
-rw-r--r-- 1 jdthood jdthood 0 2005-12-21 13:49:11.000000000 +0100 test2
[EMAIL PROTECTED]:/tmp/w$ cp --preserve=timestamps -u -v test test2
[EMAIL PROTECTED]:/tmp/w$ cp --preserve=timestamps -u -v test test2
[EMAIL PROTECTED]:/tmp/w$ cp --version
cp (GNU coreutils) 5.93
Copyright (C) 2005 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Torbjorn Granlund, David MacKenzie, and Jim Meyering.
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