52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
package main
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/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <mitch@nerdfortress.dev> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return
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* ----------------------------------------------------------------------------
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*/
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import (
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"fmt"
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"io"
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"os"
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)
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/**
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clone copies the contents of cloneSource to cloneTarget
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@param cloneBs int is the block size used for the cloning
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@param cloneSource string is the source file / volume for the clone
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@param cloneTarget string is the target file / volume for the clone
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*/
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func clone(cloneBs int, cloneSource string, cloneTarget string) {
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p := make([]byte, cloneBs)
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fSource, err := os.Open(cloneSource)
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defer fSource.Close()
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errorHandler(err)
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fTarget, err := os.OpenFile(cloneTarget, os.O_WRONLY, 0644)
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if os.IsNotExist(err) {
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fTarget, err = os.Create(cloneTarget)
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}
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defer fTarget.Close()
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errorHandler(err)
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progress := cloneBs
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for {
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n, err := fSource.Read(p)
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if err == io.EOF {
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_, err = fTarget.Write(p[:n])
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errorHandler(err)
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break
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}
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errorHandler(err)
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_, err = fTarget.Write(p[:n])
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errorHandler(err)
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fmt.Println(progress/1048576, "MB written...")
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progress += cloneBs
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}
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fmt.Println("Performing sync operations...")
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fTarget.Sync()
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}
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