GitHubMirror/go-winio
1
0
Fork 0
mirror of https://github.com/rwinkhart/go-winio.git synced 2026-09-06 09:07:18 -04:00
Code Issues Packages Projects Releases Wiki Activity

Add backuptar.BasicInfoHeader helper function

Browse Source 
This is useful for creating tar headers for things that don't have backup
streams, such as links.
This commit is contained in:
John Starks
2016-03-30 12:38:06 -07:00
parent 3b18fb5af2
commit 346aee8003
1 changed files with 19 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
backuptar/tar.go
+19 -14
View File
@@ -78,21 +78,10 @@ func copySparse(t *tar.Writer, br *winio.BackupStreamReader) error {
return nil return nil
} }
// WriteTarFileFromBackupStream writes a file to a tar writer using data from a Win32 backup stream. // BasicInfoHeader creates a tar header from basic file information.
// func BasicInfoHeader(name string, size int64, fileInfo *winio.FileBasicInfo) *tar.Header {
// This encodes Win32 metadata as tar pax vendor extensions starting with MSWINDOWS.
//
// The additional Win32 metadata is:
//
// MSWINDOWS.fileattr: The Win32 file attributes, as a decimal value
//
// MSWINDOWS.sd: The Win32 security descriptor, in SDDL (string) format
//
// MSWINDOWS.mountpoint: If present, this is a mount point and not a symlink, even though the type is '2' (symlink)
func WriteTarFileFromBackupStream(t *tar.Writer, r io.Reader, name string, size int64, fileInfo *winio.FileBasicInfo) error {
name = filepath.ToSlash(name)
hdr := &tar.Header{ hdr := &tar.Header{
Name: name, Name: filepath.ToSlash(name),
Size: size, Size: size,
Typeflag: tar.TypeReg, Typeflag: tar.TypeReg,
ModTime: time.Unix(0, fileInfo.LastWriteTime.Nanoseconds()), ModTime: time.Unix(0, fileInfo.LastWriteTime.Nanoseconds()),
@@ -108,7 +97,23 @@ func WriteTarFileFromBackupStream(t *tar.Writer, r io.Reader, name string, size
hdr.Size = 0 hdr.Size = 0
hdr.Typeflag = tar.TypeDir hdr.Typeflag = tar.TypeDir
} }
return hdr
}
// WriteTarFileFromBackupStream writes a file to a tar writer using data from a Win32 backup stream.
//
// This encodes Win32 metadata as tar pax vendor extensions starting with MSWINDOWS.
//
// The additional Win32 metadata is:
//
// MSWINDOWS.fileattr: The Win32 file attributes, as a decimal value
//
// MSWINDOWS.sd: The Win32 security descriptor, in SDDL (string) format
//
// MSWINDOWS.mountpoint: If present, this is a mount point and not a symlink, even though the type is '2' (symlink)
func WriteTarFileFromBackupStream(t *tar.Writer, r io.Reader, name string, size int64, fileInfo *winio.FileBasicInfo) error {
name = filepath.ToSlash(name)
hdr := BasicInfoHeader(name, size, fileInfo)
br := winio.NewBackupStreamReader(r) br := winio.NewBackupStreamReader(r)
var dataHdr *winio.BackupHeader var dataHdr *winio.BackupHeader
for dataHdr == nil { for dataHdr == nil {