From f9500729b79afeeb60f1d7aa58c20c542afe2465 Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Wed, 10 May 2017 11:19:32 +0100
Subject: [PATCH] mountlib: fix cross platform tests

---
 cmd/mountlib/mounttest/read_non_unix.go  | 13 ++++++
 cmd/mountlib/mounttest/read_unix.go      | 53 ++++++++++++++++++++++++
 cmd/mountlib/mounttest/write_non_unix.go | 13 ++++++
 cmd/mountlib/mounttest/write_unix.go     | 50 ++++++++++++++++++++++
 4 files changed, 129 insertions(+)
 create mode 100644 cmd/mountlib/mounttest/read_non_unix.go
 create mode 100644 cmd/mountlib/mounttest/read_unix.go
 create mode 100644 cmd/mountlib/mounttest/write_non_unix.go
 create mode 100644 cmd/mountlib/mounttest/write_unix.go

diff --git a/cmd/mountlib/mounttest/read_non_unix.go b/cmd/mountlib/mounttest/read_non_unix.go
new file mode 100644
index 000000000..6545a8fec
--- /dev/null
+++ b/cmd/mountlib/mounttest/read_non_unix.go
@@ -0,0 +1,13 @@
+// +build !linux,!darwin,!freebsd
+
+package mounttest
+
+import (
+	"runtime"
+	"testing"
+)
+
+// TestReadFileDoubleClose tests double close on read
+func TestReadFileDoubleClose(t *testing.T) {
+	t.Skip("not supported on " + runtime.GOOS)
+}
diff --git a/cmd/mountlib/mounttest/read_unix.go b/cmd/mountlib/mounttest/read_unix.go
new file mode 100644
index 000000000..a1c47c7f5
--- /dev/null
+++ b/cmd/mountlib/mounttest/read_unix.go
@@ -0,0 +1,53 @@
+// +build linux darwin freebsd
+
+package mounttest
+
+import (
+	"os"
+	"syscall"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestReadFileDoubleClose tests double close on read
+func TestReadFileDoubleClose(t *testing.T) {
+	run.skipIfNoFUSE(t)
+
+	run.createFile(t, "testdoubleclose", "hello")
+
+	in, err := os.Open(run.path("testdoubleclose"))
+	assert.NoError(t, err)
+	fd := in.Fd()
+
+	fd1, err := syscall.Dup(int(fd))
+	assert.NoError(t, err)
+
+	fd2, err := syscall.Dup(int(fd))
+	assert.NoError(t, err)
+
+	// close one of the dups - should produce no error
+	err = syscall.Close(fd1)
+	assert.NoError(t, err)
+
+	// read from the file
+	buf := make([]byte, 1)
+	_, err = in.Read(buf)
+	assert.NoError(t, err)
+
+	// close it
+	err = in.Close()
+	assert.NoError(t, err)
+
+	// read from the other dup - should produce no error as this
+	// file is now buffered
+	n, err := syscall.Read(fd2, buf)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, n)
+
+	// close the dup - should not produce an error
+	err = syscall.Close(fd2)
+	assert.NoError(t, err, "input/output error")
+
+	run.rm(t, "testdoubleclose")
+}
diff --git a/cmd/mountlib/mounttest/write_non_unix.go b/cmd/mountlib/mounttest/write_non_unix.go
new file mode 100644
index 000000000..7ef701270
--- /dev/null
+++ b/cmd/mountlib/mounttest/write_non_unix.go
@@ -0,0 +1,13 @@
+// +build !linux,!darwin,!freebsd
+
+package mounttest
+
+import (
+	"runtime"
+	"testing"
+)
+
+// TestWriteFileDoubleClose tests double close on write
+func TestWriteFileDoubleClose(t *testing.T) {
+	t.Skip("not supported on " + runtime.GOOS)
+}
diff --git a/cmd/mountlib/mounttest/write_unix.go b/cmd/mountlib/mounttest/write_unix.go
new file mode 100644
index 000000000..9fd279c8a
--- /dev/null
+++ b/cmd/mountlib/mounttest/write_unix.go
@@ -0,0 +1,50 @@
+// +build linux darwin freebsd
+
+package mounttest
+
+import (
+	"os"
+	"syscall"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestWriteFileDoubleClose tests double close on write
+func TestWriteFileDoubleClose(t *testing.T) {
+	run.skipIfNoFUSE(t)
+
+	out, err := os.Create(run.path("testdoubleclose"))
+	assert.NoError(t, err)
+	fd := out.Fd()
+
+	fd1, err := syscall.Dup(int(fd))
+	assert.NoError(t, err)
+
+	fd2, err := syscall.Dup(int(fd))
+	assert.NoError(t, err)
+
+	// close one of the dups - should produce no error
+	err = syscall.Close(fd1)
+	assert.NoError(t, err)
+
+	// write to the file
+	buf := []byte("hello")
+	n, err := out.Write(buf)
+	assert.NoError(t, err)
+	assert.Equal(t, 5, n)
+
+	// close it
+	err = out.Close()
+	assert.NoError(t, err)
+
+	// write to the other dup - should produce an error
+	n, err = syscall.Write(fd2, buf)
+	assert.Error(t, err, "input/output error")
+
+	// close the dup - should produce an error
+	err = syscall.Close(fd2)
+	assert.Error(t, err, "input/output error")
+
+	run.rm(t, "testdoubleclose")
+}