1 files changed, 58 insertions, 0 deletions
diff --git a/tests/cp/file-perm-race.sh b/tests/cp/file-perm-race.sh
new file mode 100755
index 0000000..14fa27e
--- /dev/null
+++ b/tests/cp/file-perm-race.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+# Make sure cp -p isn't too generous with file permissions.
+
+# Copyright (C) 2006-2022 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_ cp
+
+# cp -p gives ENOTSUP on NFS on Linux 2.6.9 at least
+require_local_dir_
+
+umask 022
+mkfifo_or_skip_ fifo
+
+# Terminate any background cp process
+cleanup_() { kill $pid 2>/dev/null && wait $pid; }
+
+# Copy a fifo's contents.  That way, we can examine the
+# destination permissions before they're finalized.
+cp -p --copy-contents fifo fifo-copy & pid=$!
+
+(
+  # Now 'cp' is reading the fifo.  Wait for the destination file to
+  # be created, encouraging things along by echoing to the fifo.
+  while test ! -f fifo-copy; do
+    echo foo
+  done
+
+  # Check the permissions of the destination.
+  ls -l fifo-copy >ls.out
+
+  # Close the fifo so that "cp" can continue.  But output first,
+  # before exiting, otherwise some shells would optimize away the file
+  # descriptor that holds the fifo open.
+  echo foo
+) >fifo
+
+case $(cat ls.out) in
+-???------*) ;;
+*) fail=1;;
+esac
+
+wait $pid || fail=1
+
+Exit $fail