1 files changed, 51 insertions, 0 deletions
diff --git a/tests/cp/preserve-slink-time.sh b/tests/cp/preserve-slink-time.sh
new file mode 100755
index 0000000..e0484d0
--- /dev/null
+++ b/tests/cp/preserve-slink-time.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+# Verify that cp -Pp preserves times even on symlinks.
+
+# Copyright (C) 2009-2022 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cp
+
+grep '^#define HAVE_UTIMENSAT 1' "$CONFIG_HEADER" > /dev/null ||
+grep '^#define HAVE_LUTIMES 1' "$CONFIG_HEADER" > /dev/null ||
+  skip_ 'this system lacks the utimensat function'
+
+ln -s no-such dangle || framework_failure_
+
+# If the current file system lacks sub-second resolution, sleep for 2s to
+# ensure that the times on the copy are different from those of the original.
+case $(stat --format=%y dangle) in
+  ??:??:??.000000000) sleep 2;;
+esac
+
+copy_timestamp_() {
+  sleep $1
+  rm -f d2
+  cp -Pp dangle d2 || framework_failure_
+  # Can't use --format=%x, as lstat() modifies atime on some platforms.
+  stat --format=%y dangle > t1 || framework_failure_
+  stat --format=%y d2 > t2 || framework_failure_
+  compare t1 t2
+}
+
+# We retry with a delay at least 1.5s because on GPFS
+# it was seen that the timestamp wasn't updated unless there
+# was sufficient delay between the ln and cp.
+# I.e., if there wasn't sufficient difference in
+# the timestamp being updated, the update was discarded.
+retry_delay_ copy_timestamp_ .1 4 || fail=1
+
+Exit $fail