mirror of
https://github.com/moby/moby.git
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40 lines
871 B
Go
40 lines
871 B
Go
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// +build !windows
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package archive
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import (
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"errors"
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"syscall"
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"github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar"
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)
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func setHeaderForSpecialDevice(hdr *tar.Header, ta *tarAppender, name string, stat interface{}) (nlink uint32, inode uint64, err error) {
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s, ok := stat.(*syscall.Stat_t)
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if !ok {
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err = errors.New("cannot convert stat value to syscall.Stat_t")
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return
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}
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nlink = uint32(s.Nlink)
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inode = uint64(s.Ino)
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// Currently go does not fil in the major/minors
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if s.Mode&syscall.S_IFBLK == syscall.S_IFBLK ||
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s.Mode&syscall.S_IFCHR == syscall.S_IFCHR {
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hdr.Devmajor = int64(major(uint64(s.Rdev)))
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hdr.Devminor = int64(minor(uint64(s.Rdev)))
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}
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return
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}
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func major(device uint64) uint64 {
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return (device >> 8) & 0xfff
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}
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func minor(device uint64) uint64 {
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return (device & 0xff) | ((device >> 12) & 0xfff00)
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}
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