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Diffstat (limited to 'src/pkg/archive/tar/common.go')
-rw-r--r--src/pkg/archive/tar/common.go305
1 files changed, 0 insertions, 305 deletions
diff --git a/src/pkg/archive/tar/common.go b/src/pkg/archive/tar/common.go
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index e363aa793..000000000
--- a/src/pkg/archive/tar/common.go
+++ /dev/null
@@ -1,305 +0,0 @@
-// Copyright 2009 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.
-
-// Package tar implements access to tar archives.
-// It aims to cover most of the variations, including those produced
-// by GNU and BSD tars.
-//
-// References:
-// http://www.freebsd.org/cgi/man.cgi?query=tar&sektion=5
-// http://www.gnu.org/software/tar/manual/html_node/Standard.html
-// http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html
-package tar
-
-import (
- "bytes"
- "errors"
- "fmt"
- "os"
- "path"
- "time"
-)
-
-const (
- blockSize = 512
-
- // Types
- TypeReg = '0' // regular file
- TypeRegA = '\x00' // regular file
- TypeLink = '1' // hard link
- TypeSymlink = '2' // symbolic link
- TypeChar = '3' // character device node
- TypeBlock = '4' // block device node
- TypeDir = '5' // directory
- TypeFifo = '6' // fifo node
- TypeCont = '7' // reserved
- TypeXHeader = 'x' // extended header
- TypeXGlobalHeader = 'g' // global extended header
- TypeGNULongName = 'L' // Next file has a long name
- TypeGNULongLink = 'K' // Next file symlinks to a file w/ a long name
- TypeGNUSparse = 'S' // sparse file
-)
-
-// A Header represents a single header in a tar archive.
-// Some fields may not be populated.
-type Header struct {
- Name string // name of header file entry
- Mode int64 // permission and mode bits
- Uid int // user id of owner
- Gid int // group id of owner
- Size int64 // length in bytes
- ModTime time.Time // modified time
- Typeflag byte // type of header entry
- Linkname string // target name of link
- Uname string // user name of owner
- Gname string // group name of owner
- Devmajor int64 // major number of character or block device
- Devminor int64 // minor number of character or block device
- AccessTime time.Time // access time
- ChangeTime time.Time // status change time
- Xattrs map[string]string
-}
-
-// File name constants from the tar spec.
-const (
- fileNameSize = 100 // Maximum number of bytes in a standard tar name.
- fileNamePrefixSize = 155 // Maximum number of ustar extension bytes.
-)
-
-// FileInfo returns an os.FileInfo for the Header.
-func (h *Header) FileInfo() os.FileInfo {
- return headerFileInfo{h}
-}
-
-// headerFileInfo implements os.FileInfo.
-type headerFileInfo struct {
- h *Header
-}
-
-func (fi headerFileInfo) Size() int64 { return fi.h.Size }
-func (fi headerFileInfo) IsDir() bool { return fi.Mode().IsDir() }
-func (fi headerFileInfo) ModTime() time.Time { return fi.h.ModTime }
-func (fi headerFileInfo) Sys() interface{} { return fi.h }
-
-// Name returns the base name of the file.
-func (fi headerFileInfo) Name() string {
- if fi.IsDir() {
- return path.Base(path.Clean(fi.h.Name))
- }
- return path.Base(fi.h.Name)
-}
-
-// Mode returns the permission and mode bits for the headerFileInfo.
-func (fi headerFileInfo) Mode() (mode os.FileMode) {
- // Set file permission bits.
- mode = os.FileMode(fi.h.Mode).Perm()
-
- // Set setuid, setgid and sticky bits.
- if fi.h.Mode&c_ISUID != 0 {
- // setuid
- mode |= os.ModeSetuid
- }
- if fi.h.Mode&c_ISGID != 0 {
- // setgid
- mode |= os.ModeSetgid
- }
- if fi.h.Mode&c_ISVTX != 0 {
- // sticky
- mode |= os.ModeSticky
- }
-
- // Set file mode bits.
- // clear perm, setuid, setgid and sticky bits.
- m := os.FileMode(fi.h.Mode) &^ 07777
- if m == c_ISDIR {
- // directory
- mode |= os.ModeDir
- }
- if m == c_ISFIFO {
- // named pipe (FIFO)
- mode |= os.ModeNamedPipe
- }
- if m == c_ISLNK {
- // symbolic link
- mode |= os.ModeSymlink
- }
- if m == c_ISBLK {
- // device file
- mode |= os.ModeDevice
- }
- if m == c_ISCHR {
- // Unix character device
- mode |= os.ModeDevice
- mode |= os.ModeCharDevice
- }
- if m == c_ISSOCK {
- // Unix domain socket
- mode |= os.ModeSocket
- }
-
- switch fi.h.Typeflag {
- case TypeLink, TypeSymlink:
- // hard link, symbolic link
- mode |= os.ModeSymlink
- case TypeChar:
- // character device node
- mode |= os.ModeDevice
- mode |= os.ModeCharDevice
- case TypeBlock:
- // block device node
- mode |= os.ModeDevice
- case TypeDir:
- // directory
- mode |= os.ModeDir
- case TypeFifo:
- // fifo node
- mode |= os.ModeNamedPipe
- }
-
- return mode
-}
-
-// sysStat, if non-nil, populates h from system-dependent fields of fi.
-var sysStat func(fi os.FileInfo, h *Header) error
-
-// Mode constants from the tar spec.
-const (
- c_ISUID = 04000 // Set uid
- c_ISGID = 02000 // Set gid
- c_ISVTX = 01000 // Save text (sticky bit)
- c_ISDIR = 040000 // Directory
- c_ISFIFO = 010000 // FIFO
- c_ISREG = 0100000 // Regular file
- c_ISLNK = 0120000 // Symbolic link
- c_ISBLK = 060000 // Block special file
- c_ISCHR = 020000 // Character special file
- c_ISSOCK = 0140000 // Socket
-)
-
-// Keywords for the PAX Extended Header
-const (
- paxAtime = "atime"
- paxCharset = "charset"
- paxComment = "comment"
- paxCtime = "ctime" // please note that ctime is not a valid pax header.
- paxGid = "gid"
- paxGname = "gname"
- paxLinkpath = "linkpath"
- paxMtime = "mtime"
- paxPath = "path"
- paxSize = "size"
- paxUid = "uid"
- paxUname = "uname"
- paxXattr = "SCHILY.xattr."
- paxNone = ""
-)
-
-// FileInfoHeader creates a partially-populated Header from fi.
-// If fi describes a symlink, FileInfoHeader records link as the link target.
-// If fi describes a directory, a slash is appended to the name.
-// Because os.FileInfo's Name method returns only the base name of
-// the file it describes, it may be necessary to modify the Name field
-// of the returned header to provide the full path name of the file.
-func FileInfoHeader(fi os.FileInfo, link string) (*Header, error) {
- if fi == nil {
- return nil, errors.New("tar: FileInfo is nil")
- }
- fm := fi.Mode()
- h := &Header{
- Name: fi.Name(),
- ModTime: fi.ModTime(),
- Mode: int64(fm.Perm()), // or'd with c_IS* constants later
- }
- switch {
- case fm.IsRegular():
- h.Mode |= c_ISREG
- h.Typeflag = TypeReg
- h.Size = fi.Size()
- case fi.IsDir():
- h.Typeflag = TypeDir
- h.Mode |= c_ISDIR
- h.Name += "/"
- case fm&os.ModeSymlink != 0:
- h.Typeflag = TypeSymlink
- h.Mode |= c_ISLNK
- h.Linkname = link
- case fm&os.ModeDevice != 0:
- if fm&os.ModeCharDevice != 0 {
- h.Mode |= c_ISCHR
- h.Typeflag = TypeChar
- } else {
- h.Mode |= c_ISBLK
- h.Typeflag = TypeBlock
- }
- case fm&os.ModeNamedPipe != 0:
- h.Typeflag = TypeFifo
- h.Mode |= c_ISFIFO
- case fm&os.ModeSocket != 0:
- h.Mode |= c_ISSOCK
- default:
- return nil, fmt.Errorf("archive/tar: unknown file mode %v", fm)
- }
- if fm&os.ModeSetuid != 0 {
- h.Mode |= c_ISUID
- }
- if fm&os.ModeSetgid != 0 {
- h.Mode |= c_ISGID
- }
- if fm&os.ModeSticky != 0 {
- h.Mode |= c_ISVTX
- }
- if sysStat != nil {
- return h, sysStat(fi, h)
- }
- return h, nil
-}
-
-var zeroBlock = make([]byte, blockSize)
-
-// POSIX specifies a sum of the unsigned byte values, but the Sun tar uses signed byte values.
-// We compute and return both.
-func checksum(header []byte) (unsigned int64, signed int64) {
- for i := 0; i < len(header); i++ {
- if i == 148 {
- // The chksum field (header[148:156]) is special: it should be treated as space bytes.
- unsigned += ' ' * 8
- signed += ' ' * 8
- i += 7
- continue
- }
- unsigned += int64(header[i])
- signed += int64(int8(header[i]))
- }
- return
-}
-
-type slicer []byte
-
-func (sp *slicer) next(n int) (b []byte) {
- s := *sp
- b, *sp = s[0:n], s[n:]
- return
-}
-
-func isASCII(s string) bool {
- for _, c := range s {
- if c >= 0x80 {
- return false
- }
- }
- return true
-}
-
-func toASCII(s string) string {
- if isASCII(s) {
- return s
- }
- var buf bytes.Buffer
- for _, c := range s {
- if c < 0x80 {
- buf.WriteByte(byte(c))
- }
- }
- return buf.String()
-}
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