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misc/dist: use archive/tar.FileInfoHeader

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Fixes #3299

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6250056
This commit is contained in:
Brad Fitzpatrick 2012-05-24 17:32:25 -07:00
parent c23041efd9
commit ca6b4d535f
3 changed files with 2 additions and 126 deletions
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64
misc/dist/bindist.go vendored
View File

@ -581,7 +581,8 @@ func makeTar(targ, workdir string) error {
if *verbose {
log.Printf("adding to tar: %s", name)
}
hdr, err := tarFileInfoHeader(fi, path)
target, _ := os.Readlink(path)
hdr, err := tar.FileInfoHeader(fi, target)
if err != nil {
return err
}
@ -752,64 +753,3 @@ func lookPath(prog string) (absPath string, err error) {
}
return
}
// sysStat, if non-nil, populates h from system-dependent fields of fi.
var sysStat func(fi os.FileInfo, h *tar.Header) error
// Mode constants from the tar spec.
const (
c_ISDIR = 040000
c_ISFIFO = 010000
c_ISREG = 0100000
c_ISLNK = 0120000
c_ISBLK = 060000
c_ISCHR = 020000
c_ISSOCK = 0140000
)
// tarFileInfoHeader creates a partially-populated Header from an os.FileInfo.
// The filename parameter is used only in the case of symlinks, to call os.Readlink.
// If fi is a symlink but filename is empty, an error is returned.
func tarFileInfoHeader(fi os.FileInfo, filename string) (*tar.Header, error) {
h := &tar.Header{
Name: fi.Name(),
ModTime: fi.ModTime(),
Mode: int64(fi.Mode().Perm()), // or'd with c_IS* constants later
}
switch {
case fi.Mode()&os.ModeType == 0:
h.Mode |= c_ISREG
h.Typeflag = tar.TypeReg
h.Size = fi.Size()
case fi.IsDir():
h.Typeflag = tar.TypeDir
h.Mode |= c_ISDIR
case fi.Mode()&os.ModeSymlink != 0:
h.Typeflag = tar.TypeSymlink
h.Mode |= c_ISLNK
if filename == "" {
return h, fmt.Errorf("archive/tar: unable to populate Header.Linkname of symlinks")
}
targ, err := os.Readlink(filename)
if err != nil {
return h, err
}
h.Linkname = targ
case fi.Mode()&os.ModeDevice != 0:
if fi.Mode()&os.ModeCharDevice != 0 {
h.Mode |= c_ISCHR
h.Typeflag = tar.TypeChar
} else {
h.Mode |= c_ISBLK
h.Typeflag = tar.TypeBlock
}
case fi.Mode()&os.ModeSocket != 0:
h.Mode |= c_ISSOCK
default:
return nil, fmt.Errorf("archive/tar: unknown file mode %v", fi.Mode())
}
if sysStat != nil {
return h, sysStat(fi, h)
}
return h, nil
}

32
misc/dist/stat_darwin.go vendored
View File

@ -1,32 +0,0 @@
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin
package main
import (
"archive/tar"
"os"
"syscall"
"time"
)
func init() {
sysStat = func(fi os.FileInfo, h *tar.Header) error {
sys, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return nil
}
h.Uid = int(sys.Uid)
h.Gid = int(sys.Gid)
// TODO(bradfitz): populate username & group. os/user
// doesn't cache LookupId lookups, and lacks group
// lookup functions.
h.AccessTime = time.Unix(sys.Atimespec.Unix())
h.ChangeTime = time.Unix(sys.Ctimespec.Unix())
// TODO(bradfitz): major/minor device numbers?
return nil
}
}

32
misc/dist/stat_linux.go vendored
View File

@ -1,32 +0,0 @@
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
package main
import (
"archive/tar"
"os"
"syscall"
"time"
)
func init() {
sysStat = func(fi os.FileInfo, h *tar.Header) error {
sys, ok := fi.Sys().(*syscall.Stat_t)
if !ok {
return nil
}
h.Uid = int(sys.Uid)
h.Gid = int(sys.Gid)
// TODO(bradfitz): populate username & group. os/user
// doesn't cache LookupId lookups, and lacks group
// lookup functions.
h.AccessTime = time.Unix(sys.Atim.Unix())
h.ChangeTime = time.Unix(sys.Ctim.Unix())
// TODO(bradfitz): major/minor device numbers?
return nil
}
}