63 lines
1.7 KiB
Markdown
63 lines
1.7 KiB
Markdown
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# go-cpio [](https://godoc.org/github.com/cavaliercoder/go-cpio) [](https://travis-ci.org/cavaliercoder/go-cpio) [](https://goreportcard.com/report/github.com/cavaliercoder/go-cpio)
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This package provides a Go native implementation of the CPIO archive file
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format.
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Currently, only the SVR4 (New ASCII) format is supported, both with and without
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checksums.
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```go
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// Create a buffer to write our archive to.
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buf := new(bytes.Buffer)
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// Create a new cpio archive.
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w := cpio.NewWriter(buf)
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// Add some files to the archive.
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var files = []struct {
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Name, Body string
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}{
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{"readme.txt", "This archive contains some text files."},
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{"gopher.txt", "Gopher names:\nGeorge\nGeoffrey\nGonzo"},
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{"todo.txt", "Get animal handling license."},
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}
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for _, file := range files {
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hdr := &cpio.Header{
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Name: file.Name,
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Mode: 0600,
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Size: int64(len(file.Body)),
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}
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if err := w.WriteHeader(hdr); err != nil {
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log.Fatalln(err)
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}
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if _, err := w.Write([]byte(file.Body)); err != nil {
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log.Fatalln(err)
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}
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}
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// Make sure to check the error on Close.
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if err := w.Close(); err != nil {
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log.Fatalln(err)
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}
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// Open the cpio archive for reading.
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b := bytes.NewReader(buf.Bytes())
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r := cpio.NewReader(b)
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// Iterate through the files in the archive.
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for {
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hdr, err := r.Next()
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if err == io.EOF {
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// end of cpio archive
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break
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}
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if err != nil {
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log.Fatalln(err)
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}
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fmt.Printf("Contents of %s:\n", hdr.Name)
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if _, err := io.Copy(os.Stdout, r); err != nil {
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log.Fatalln(err)
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}
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fmt.Println()
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}
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```
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