54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
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package chrootarchive // import "github.com/docker/docker/pkg/chrootarchive"
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import (
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"io"
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"github.com/docker/docker/pkg/archive"
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"github.com/pkg/errors"
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"golang.org/x/sys/unix"
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)
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func doUnpack(decompressedArchive io.Reader, relDest, root string, options *archive.TarOptions) error {
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done := make(chan error)
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err := goInChroot(root, func() { done <- archive.Unpack(decompressedArchive, relDest, options) })
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if err != nil {
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return err
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}
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return <-done
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}
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func doPack(relSrc, root string, options *archive.TarOptions) (io.ReadCloser, error) {
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tb, err := archive.NewTarballer(relSrc, options)
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if err != nil {
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return nil, errors.Wrap(err, "error processing tar file")
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}
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err = goInChroot(root, tb.Do)
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if err != nil {
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return nil, errors.Wrap(err, "could not chroot")
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}
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return tb.Reader(), nil
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}
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func doUnpackLayer(root string, layer io.Reader, options *archive.TarOptions) (int64, error) {
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type result struct {
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layerSize int64
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err error
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}
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done := make(chan result)
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err := goInChroot(root, func() {
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// We need to be able to set any perms
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_ = unix.Umask(0)
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size, err := archive.UnpackLayer("/", layer, options)
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done <- result{layerSize: size, err: err}
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})
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if err != nil {
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return 0, err
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}
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res := <-done
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return res.layerSize, res.err
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}
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