1 files changed, 172 insertions, 0 deletions
diff --git a/internal/fusefrontend/prepare_syscall_test.go b/internal/fusefrontend/prepare_syscall_test.go
new file mode 100644
index 0000000..28e655c
--- /dev/null
+++ b/internal/fusefrontend/prepare_syscall_test.go
@@ -0,0 +1,172 @@
+package fusefrontend
+
+import (
+	"strings"
+	"syscall"
+	"testing"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/hanwen/go-fuse/v2/fuse"
+
+	"github.com/rfjakob/gocryptfs/internal/syscallcompat"
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
+)
+
+func TestPrepareAtSyscall(t *testing.T) {
+	cipherdir := test_helpers.InitFS(t)
+	t.Logf("cipherdir = %q", cipherdir)
+	args := Args{
+		Cipherdir: cipherdir,
+	}
+	rn := newTestFS(args)
+	out := &fuse.EntryOut{}
+
+	child, errno := rn.Mkdir(nil, "dir1", 0700, out)
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	rn.AddChild("dir1", child, false)
+	dir1 := toNode(child.Operations())
+	_, errno = dir1.Mkdir(nil, "dir2", 0700, out)
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+
+	dirfd, cName, errno := rn.prepareAtSyscallMyself()
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName != "." {
+		t.Fatal("cName should be .")
+	}
+	syscall.Close(dirfd)
+
+	// Again, but populate the cache for "" by looking up a non-existing file
+	rn.Lookup(nil, "xyz1234", &fuse.EntryOut{})
+	dirfd, cName, errno = rn.prepareAtSyscallMyself()
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName != "." {
+		t.Fatal("cName should be .")
+	}
+
+	err := syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	err = syscallcompat.Faccessat(dirfd, ".", unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	syscall.Close(dirfd)
+
+	dirfd, cName, errno = rn.prepareAtSyscall("dir1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cName == "" {
+		t.Fatal("cName should not be empty")
+	}
+	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	syscall.Close(dirfd)
+
+	dirfd, cName, errno = dir1.prepareAtSyscall("dir2")
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName == "" {
+		t.Fatal("cName should not be empty")
+	}
+	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Errorf("Faccessat(%d, %q): %v", dirfd, cName, err)
+	}
+	syscall.Close(dirfd)
+
+	n255 := strings.Repeat("n", 255)
+	dir1.Mkdir(nil, n255, 0700, out)
+	dirfd, cName, errno = dir1.prepareAtSyscall(n255)
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName == "" {
+		t.Fatal("cName should not be empty")
+	}
+	if len(cName) >= 255 {
+		t.Fatalf("cName is too long: %q", cName)
+	}
+	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Errorf("Faccessat(%d, %q): %v", dirfd, cName, err)
+	}
+	syscall.Close(dirfd)
+}
+
+func TestPrepareAtSyscallPlaintextnames(t *testing.T) {
+	cipherdir := test_helpers.InitFS(t, "-plaintextnames")
+	args := Args{
+		Cipherdir:      cipherdir,
+		PlaintextNames: true,
+	}
+	rn := newTestFS(args)
+	out := &fuse.EntryOut{}
+
+	child, errno := rn.Mkdir(nil, "dir1", 0700, out)
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	rn.AddChild("dir1", child, false)
+	dir1 := toNode(child.Operations())
+	_, errno = dir1.Mkdir(nil, "dir2", 0700, out)
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+
+	dirfd, cName, errno := rn.prepareAtSyscallMyself()
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName != "." {
+		t.Fatal("cName should be .")
+	}
+	err := syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	err = syscallcompat.Faccessat(dirfd, ".", unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	syscall.Close(dirfd)
+
+	dirfd, cName, errno = rn.prepareAtSyscall("dir1")
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName != "dir1" {
+		t.Fatalf("wrong cName: %q", cName)
+	}
+	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	syscall.Close(dirfd)
+
+	dirfd, cName, errno = dir1.prepareAtSyscall("dir2")
+	if errno != 0 {
+		t.Fatal(errno)
+	}
+	if cName != "dir2" {
+		t.Fatalf("wrong cName: %q", cName)
+	}
+	err = syscallcompat.Faccessat(dirfd, cName, unix.R_OK)
+	if err != nil {
+		t.Error(err)
+	}
+	syscall.Close(dirfd)
+}