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backup: fix reading xattrs on Windows for root disks as regular user

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Unprivileged users cannot open the root disks with write permissions for
xattrs. Thus, only request read permissions for reading the xattrs.
This commit is contained in:
Michael Eischer
2024-06-14 22:36:07 +02:00
parent 20a6c526e5
commit c01b655229
2 changed files with 10 additions and 7 deletions
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13
internal/fs/file_windows.go
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@@ -105,17 +105,20 @@ func ClearAttribute(path string, attribute uint32) error {
}
// OpenHandleForEA return a file handle for file or dir for setting/getting EAs
func OpenHandleForEA(nodeType, path string) (handle windows.Handle, err error) {
func OpenHandleForEA(nodeType, path string, writeAccess bool) (handle windows.Handle, err error) {
path = fixpath(path)
fileAccess := windows.FILE_READ_EA
if writeAccess {
fileAccess = fileAccess | windows.FILE_WRITE_EA
}
switch nodeType {
case "file":
utf16Path := windows.StringToUTF16Ptr(path)
fileAccessRightReadWriteEA := (0x8 | 0x10)
handle, err = windows.CreateFile(utf16Path, uint32(fileAccessRightReadWriteEA), 0, nil, windows.OPEN_EXISTING, windows.FILE_ATTRIBUTE_NORMAL, 0)
handle, err = windows.CreateFile(utf16Path, uint32(fileAccess), 0, nil, windows.OPEN_EXISTING, windows.FILE_ATTRIBUTE_NORMAL, 0)
case "dir":
utf16Path := windows.StringToUTF16Ptr(path)
fileAccessRightReadWriteEA := (0x8 | 0x10)
handle, err = windows.CreateFile(utf16Path, uint32(fileAccessRightReadWriteEA), 0, nil, windows.OPEN_EXISTING, windows.FILE_ATTRIBUTE_NORMAL|windows.FILE_FLAG_BACKUP_SEMANTICS, 0)
handle, err = windows.CreateFile(utf16Path, uint32(fileAccess), 0, nil, windows.OPEN_EXISTING, windows.FILE_ATTRIBUTE_NORMAL|windows.FILE_FLAG_BACKUP_SEMANTICS, 0)
default:
return 0, nil
}