From e55a637512131c21a7eb16574aba799abd2a336f Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 5 Jun 2025 19:19:53 +0200
Subject: tests: add TestRootForceOwner

	$ make root_test
	[...]
	=== RUN   TestRootForceOwner
	    root_test.go:398: mkdir /var/tmp/gocryptfs-test-parent-0/3816769547/TestRootForceOwner.2366169656.mnt/dir1: permission denied
	    root_test.go:408: open /var/tmp/gocryptfs-test-parent-0/3816769547/TestRootForceOwner.2366169656.mnt/file1: permission denied
	    root_test.go:415: mknod: permission denied
	--- FAIL: TestRootForceOwner (0.04s)

https://github.com/rfjakob/gocryptfs/issues/783
---
 tests/root_test/root_test.go | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tests/root_test/root_test.go b/tests/root_test/root_test.go
index e432ce0..9ce1f4b 100644
--- a/tests/root_test/root_test.go
+++ b/tests/root_test/root_test.go
@@ -379,3 +379,39 @@ func TestOverlay(t *testing.T) {
 	}
 	defer syscall.Unmount(ovlMnt, 0)
 }
+
+// Check that mkdir and file create works with force_owner and runnung as root
+// https://github.com/rfjakob/gocryptfs/issues/783
+func TestRootForceOwner(t *testing.T) {
+	if os.Getuid() != 0 {
+		t.Skip("must run as root")
+	}
+	cDir := test_helpers.InitFS(t)
+	pDir := cDir + ".mnt"
+	test_helpers.MountOrFatal(t, cDir, pDir, "-allow_other", "-extpass=echo test", "-force_owner=1234:1234")
+	defer test_helpers.UnmountPanic(pDir)
+
+	err := asUser(1234, 1234, nil, func() error {
+		return os.Mkdir(pDir+"/dir1", 0700)
+	})
+	if err != nil {
+		t.Error(err)
+	}
+	err = asUser(1234, 1234, nil, func() error {
+		f, err := os.Create(pDir + "/file1")
+		if err == nil {
+			f.Close()
+		}
+		return err
+	})
+	if err != nil {
+		t.Error(err)
+	}
+	err = asUser(1234, 1234, nil, func() error {
+		sock := pDir + "/sock"
+		return syscall.Mknod(sock, syscall.S_IFSOCK|0600, 0)
+	})
+	if err != nil {
+		t.Errorf("mknod: %v", err)
+	}
+}
-- 
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