rclone/cmd/mountlib/mounttest/write_unix.go

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// +build linux darwin freebsd
package mounttest
import (
"syscall"
"testing"
"github.com/stretchr/testify/assert"
)
// TestWriteFileDoubleClose tests double close on write
func TestWriteFileDoubleClose(t *testing.T) {
run.skipIfNoFUSE(t)
out, err := osCreate(run.path("testdoubleclose"))
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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
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_, err = syscall.Write(fd2, buf)
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assert.Error(t, err, "input/output error")
// close the dup - should not produce an error
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err = syscall.Close(fd2)
assert.NoError(t, err)
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run.waitForWriters()
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run.rm(t, "testdoubleclose")
}