30 lines
880 B
Go
30 lines
880 B
Go
package open
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import (
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"os"
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"path/filepath"
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"testing"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/unix"
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)
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func TestBindFdToPath(t *testing.T) {
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first := t.TempDir()
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sampleData := []byte("sample data")
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err := os.WriteFile(filepath.Join(first, "testfile"), sampleData, 0o600)
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require.NoError(t, err, "writing sample data to first directory")
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fd, err := unix.Open(first, unix.O_DIRECTORY, 0)
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require.NoError(t, err, "opening descriptor for first directory")
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second := t.TempDir()
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err = BindFdToPath(uintptr(fd), second)
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require.NoError(t, err)
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t.Cleanup(func() {
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err := unix.Unmount(second, unix.MNT_DETACH)
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require.NoError(t, err, "unmounting as part of cleanup")
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})
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readBack, err := os.ReadFile(filepath.Join(second, "testfile"))
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require.NoError(t, err)
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require.Equal(t, sampleData, readBack, "expected to read back data via the bind mount")
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}
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