1 files changed, 57 insertions, 0 deletions
diff --git a/tests/cp/into-self.sh b/tests/cp/into-self.sh
new file mode 100755
index 0000000..fb2e820
--- /dev/null
+++ b/tests/cp/into-self.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+# Confirm that copying a directory into itself gets a proper diagnostic.
+
+# Copyright (C) 2001-2023 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/>.
+
+# In 4.0.35 and earlier, 'mkdir dir && cp -R dir dir' would produce this:
+#   cp: won't create hard link 'dir/dir/dir' to directory ''
+# Now it gives this:
+#   cp: can't copy a directory 'dir' into itself 'dir/dir'
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cp
+
+mkdir a dir || framework_failure_
+
+
+# This command should exit nonzero.
+cp -R dir dir 2> out && fail=1
+echo 1 >> out
+
+# This should, too.  However, with coreutils-7.1 it would infloop.
+cp -rl dir dir 2>> out && fail=1
+echo 2 >> out
+
+cp -rl a dir dir 2>> out && fail=1
+echo 3 >> out
+cp -rl a dir dir 2>> out && fail=1
+echo 4 >> out
+
+cat > exp <<\EOF
+cp: cannot copy a directory, 'dir', into itself, 'dir/dir'
+1
+cp: cannot copy a directory, 'dir', into itself, 'dir/dir'
+2
+cp: cannot copy a directory, 'dir', into itself, 'dir/dir'
+3
+cp: cannot copy a directory, 'dir', into itself, 'dir/dir'
+4
+EOF
+#'
+
+compare exp out || fail=1
+
+Exit $fail