cli: add -longnamemax

Fixes https://github.com/rfjakob/gocryptfs/issues/499

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/cli/longnamemax_test.go b/tests/cli/longnamemax_test.go
new file mode 100644
index 0000000..fc429f6
--- /dev/null
+++ b/tests/cli/longnamemax_test.go
@@ -0,0 +1,61 @@
+package cli
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/v2/internal/configfile"
+
+	"github.com/rfjakob/gocryptfs/v2/tests/test_helpers"
+)
+
+// Create & test fs with -longnamemax=100
+func TestLongnamemax100(t *testing.T) {
+	cDir := test_helpers.InitFS(nil, "-longnamemax", "100")
+	pDir := cDir + ".mnt"
+
+	// Check config file sanity
+	_, c, err := configfile.LoadAndDecrypt(cDir+"/"+configfile.ConfDefaultName, testPw)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	if !c.IsFeatureFlagSet(configfile.FlagLongNameMax) {
+		t.Error("FlagLongNameMax should be on")
+	}
+	if c.LongNameMax != 100 {
+		t.Errorf("LongNameMax=%d, want 100", c.LongNameMax)
+	}
+
+	// Check that it takes effect
+	test_helpers.MountOrExit(cDir, pDir, "-extpass", "echo test")
+	defer test_helpers.UnmountPanic(pDir)
+
+	for l := 1; l <= 255; l++ {
+		path := pDir + "/" + strings.Repeat("x", l)
+		if err := ioutil.WriteFile(path, nil, 0600); err != nil {
+			t.Fatal(err)
+		}
+		matches, err := filepath.Glob(cDir + "/gocryptfs.longname.*")
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = syscall.Unlink(path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		// As determined experimentally, a name of length >= 64 causes a longname
+		// to be created.
+		if l <= 63 && len(matches) != 0 {
+			t.Errorf("l=%d: should not see a longname yet", l)
+		}
+		if l >= 64 && len(matches) != 2 {
+			t.Errorf("l=%d: should see a longname now", l)
+		}
+	}
+}