1 files changed, 50 insertions, 0 deletions
diff --git a/tests/mv/atomic2 b/tests/mv/atomic2
new file mode 100755
index 000000000..d1029aa9c
--- /dev/null
+++ b/tests/mv/atomic2
@@ -0,0 +1,50 @@
+#!/bin/sh
+# ensure that mv doesn't first unlink a multi-hard-linked destination
+
+# Copyright (C) 2008 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 <http://www.gnu.org/licenses/>.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  mv --version
+fi
+
+. $srcdir/../test-lib.sh
+require_strace_
+
+# 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
+
+fail=0
+
+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); exit $fail