69 lines
1.1 KiB
Go
69 lines
1.1 KiB
Go
package main
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import (
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"archive/tar"
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"bufio"
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"flag"
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"fmt"
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"io"
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"os"
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)
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func main() {
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file := flag.String("file", "/dev/st0", "File (tape drive or tar file) to open")
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blockSize := flag.Int("blockSize", 512, "Size of a block in the tar stream")
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blockSizeMulitlier := flag.Int("blockSizeMultiplier", 20, "Amount of blocks to read from the tar stream at once")
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flag.Parse()
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fileDescription, err := os.Stat(*file)
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if err != nil {
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panic(err)
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}
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var f *os.File
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if fileDescription.Mode().IsRegular() {
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f, err = os.Open(*file)
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if err != nil {
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panic(err)
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}
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} else {
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f, err = os.OpenFile(*file, os.O_RDONLY, os.ModeCharDevice)
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if err != nil {
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panic(err)
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}
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}
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defer f.Close()
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br := bufio.NewReaderSize(f, *blockSize**blockSizeMulitlier)
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tr := tar.NewReader(br)
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for {
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header, err := tr.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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panic(err)
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}
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fmt.Printf(
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"%v %v %v %v %v %v %v %v %v\n",
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header.Mode,
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header.Gname,
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header.Uid,
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header.Gid,
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header.Size,
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header.ModTime,
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header.AccessTime,
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header.ChangeTime,
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header.Name,
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)
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}
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}
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