From 3d53e7fe1c31aa440cc9708c7c51db6b78c07653 Mon Sep 17 00:00:00 2001 From: Pádraig Brady Date: Thu, 12 Apr 2012 12:47:30 +0100 Subject: cp: change --attributes-only to not truncate existing files * src/copy.c (copy_reg): Don't truncate an existing file, to support copying attributes between existing files. The original use case only considered creating new files, and it would be a very unusual use case to be relying on the truncating behavior. * doc/coreutils.texi (cp invocation): Mention the non truncating behavior. * tests/cp/attr-existing: A new test to ensure O_TRUNC skipped. * tests/Makefile.am: Reference the new test. * NEWS: Mention the change in behavior. --- tests/cp/attr-existing | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100755 tests/cp/attr-existing (limited to 'tests/cp/attr-existing') diff --git a/tests/cp/attr-existing b/tests/cp/attr-existing new file mode 100755 index 000000000..9cf0ffcb3 --- /dev/null +++ b/tests/cp/attr-existing @@ -0,0 +1,29 @@ +#!/bin/sh +# Make sure cp --attributes-only doesn't truncate existing data + +# Copyright 2012 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +. "${srcdir=.}/init.sh"; path_prepend_ ../src +print_ver_ cp + +printf '1' > file1 +printf '2' > file2 +printf '2' > file2.exp + +cp --attributes-only file1 file2 || fail=1 +cmp file2 file2.exp || fail=1 + +Exit $fail -- cgit v1.2.3-54-g00ecf