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https://github.com/moby/moby.git
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7260adfff9
This version avoids doing name lookups on creating tarball that
should be avoided in to not hit loading glibc shared libraries.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
(cherry picked from commit aa6a9891b0)
Signed-off-by: Tibor Vass <tibor@docker.com>
81 lines
2.6 KiB
Go
81 lines
2.6 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build aix linux darwin dragonfly freebsd openbsd netbsd solaris
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package tar
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import (
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"os"
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"runtime"
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"syscall"
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)
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func init() {
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sysStat = statUnix
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}
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func statUnix(fi os.FileInfo, h *Header) error {
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sys, ok := fi.Sys().(*syscall.Stat_t)
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if !ok {
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return nil
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}
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h.Uid = int(sys.Uid)
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h.Gid = int(sys.Gid)
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// TODO(bradfitz): populate username & group. os/user
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// doesn't cache LookupId lookups, and lacks group
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// lookup functions.
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h.AccessTime = statAtime(sys)
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h.ChangeTime = statCtime(sys)
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// Best effort at populating Devmajor and Devminor.
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if h.Typeflag == TypeChar || h.Typeflag == TypeBlock {
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dev := uint64(sys.Rdev) // May be int32 or uint32
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switch runtime.GOOS {
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case "aix":
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var major, minor uint32
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major = uint32((dev & 0x3fffffff00000000) >> 32)
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minor = uint32((dev & 0x00000000ffffffff) >> 0)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "linux":
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// Copied from golang.org/x/sys/unix/dev_linux.go.
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major := uint32((dev & 0x00000000000fff00) >> 8)
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major |= uint32((dev & 0xfffff00000000000) >> 32)
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minor := uint32((dev & 0x00000000000000ff) >> 0)
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minor |= uint32((dev & 0x00000ffffff00000) >> 12)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "darwin":
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// Copied from golang.org/x/sys/unix/dev_darwin.go.
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major := uint32((dev >> 24) & 0xff)
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minor := uint32(dev & 0xffffff)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "dragonfly":
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// Copied from golang.org/x/sys/unix/dev_dragonfly.go.
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major := uint32((dev >> 8) & 0xff)
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minor := uint32(dev & 0xffff00ff)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "freebsd":
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// Copied from golang.org/x/sys/unix/dev_freebsd.go.
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major := uint32((dev >> 8) & 0xff)
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minor := uint32(dev & 0xffff00ff)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "netbsd":
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// Copied from golang.org/x/sys/unix/dev_netbsd.go.
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major := uint32((dev & 0x000fff00) >> 8)
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minor := uint32((dev & 0x000000ff) >> 0)
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minor |= uint32((dev & 0xfff00000) >> 12)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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case "openbsd":
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// Copied from golang.org/x/sys/unix/dev_openbsd.go.
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major := uint32((dev & 0x0000ff00) >> 8)
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minor := uint32((dev & 0x000000ff) >> 0)
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minor |= uint32((dev & 0xffff0000) >> 8)
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h.Devmajor, h.Devminor = int64(major), int64(minor)
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default:
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// TODO: Implement solaris (see https://golang.org/issue/8106)
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}
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}
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return nil
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}
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