tests: ensure tests/cp/preserve-gid.sh works with single binary

* tests/cp/preserve-gid.sh: If configured with --enable-single-binary
copy the coreutils single binary, instead of the cp one-line launcher.

Discussed at https://bugzilla.redhat.com/1800597
Fixes https://bugs.gnu.org/39485

diff --git a/tests/cp/preserve-gid.sh b/tests/cp/preserve-gid.sh
index e48584c1e98ad8d47a4bf08241de5f3792b61467..bba09df098ff44616536891f97b8fa0bd5da90e1 100755 (executable)
--- a/tests/cp/preserve-gid.sh
+++ b/tests/cp/preserve-gid.sh
@@ -110,7 +110,14 @@ cleanup_() { rm -rf "$tmp_path"; }
 # is not readable by our nameless IDs.
 test -d /tmp && TMPDIR=/tmp
 tmp_path=$(mktemp -d) || fail_ "failed to create temporary directory"
-cp "$abs_path_dir_/cp" "$tmp_path"
+if test -x "$abs_path_dir_/coreutils" &&
+   { test -l "$abs_path_dir_/cp" ||
+     test $(wc -l < "$abs_path_dir_/cp") = 1; } then
+  # if configured with --enable-single-binary we need to use the single binary
+  cp "$abs_path_dir_/coreutils" "$tmp_path/cp" || framework_failure_
+else
+  cp "$abs_path_dir_/cp" "$tmp_path"
+fi
 chmod -R a+rx "$tmp_path"
 
 t1() {