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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 17:39:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 17:39:29 +0000
commit8ffec2a3aba6f114784e11f89ef1d57a096ae540 (patch)
treeccebcbad06203e8241a8e7249f8e6c478a3682ea /tests/mv/atomic2.sh
parentInitial commit. (diff)
downloadcoreutils-8ffec2a3aba6f114784e11f89ef1d57a096ae540.tar.xz
coreutils-8ffec2a3aba6f114784e11f89ef1d57a096ae540.zip
Adding upstream version 8.32.upstream/8.32upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/mv/atomic2.sh')
-rwxr-xr-xtests/mv/atomic2.sh45
1 files changed, 45 insertions, 0 deletions
diff --git a/tests/mv/atomic2.sh b/tests/mv/atomic2.sh
new file mode 100755
index 0000000..1c09538
--- /dev/null
+++ b/tests/mv/atomic2.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# ensure that mv doesn't first unlink a multi-hard-linked destination
+
+# Copyright (C) 2008-2020 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 <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ mv
+require_strace_ unlink
+
+# Before the fix, mv would unnecessarily unlink the destination symlink:
+# $ rm -f a b b2; touch a b; ln b b2; strace -e unlink /p/bin/mv a b
+# unlink("b") = 0
+#
+# With the fix, it doesn't call unlink:
+# $ rm -f a b b2; touch a b; ln b b2; strace -e unlink ./mv a b
+# $
+
+touch a b || framework_failure_
+ln b b2 || framework_failure_
+
+
+strace -qe unlink mv a b > out 2>&1 || fail=1
+$EGREP 'unlink.*"b"' out && fail=1
+
+# Ensure that the source, "a", is gone.
+ls -dl a > /dev/null 2>&1 && fail=1
+
+# Ensure that the destination, "b", has link count 1.
+n_links=$(stat --printf=%h b) || fail=1
+test "$n_links" = 1 || fail=1
+
+Exit $fail