Connect and share knowledge within a single location that is structured and easy to search. I have the following need to implement on Windows: file with files.
Originally I was thinking to use directory with extension. Something like "folderA. Unfortunately, I was unable to find a way to do that. Then I tried to use Alternate Data Streams. This works just fine, but several problems with it:. No, I can't use zip or any other way to combine files into one - this is high-performance app that also requires write streaming i.
Any idea how else to achieve my need on Windows? I know on MacOS you can use 'package', but there is nothing like that on Windows. Usually you must have administrative or backup privileges to run ADS detection software. Please note that many of the available ADS detectors simply alert you to the existence of alternate data streams, rather than removing them.
Not only do a lot of applications use ADS; so does Windows itself. Some ADS detection utilities, such as Streams, will automatically delete alternate data streams. However, many of them simply notify you of the existence of alternate data streams. However, programs such as Acronis Disk Director will let you create partitions of different file types, including FAT, out of unused space in an existing partition.
If the alternate data stream is attached to a directory, you need a different method. Your email address will not be published. Alternate Data Stream On: August 25, What is the primary data stream? It is also called the unnamed data stream, referring to the standard content of a file or directory, which is usually visible to users.
The primary data stream file is the host file and you can see it in Windows Explorer. What is non-primary data stream? The non-primary data stream is the data stream having a name. These data streams are so-called alternate data streams. Anti-virus applications like Kaspersky use ADS to enhance the scanning technology. It can store data related to the file like keywords, summaries, sound files, images, etc.
Or, a criminal may use the technique to hide something on their own system so that others will not readily find it. There are quite a number of ADS tools out there at the moment, here are a few to get you started. Quinn Shamblin. What are Alternate Data Streams? How are ADS used? Save and close. Type the following to confirm that you have a good victim file: notepad readme. This has all been setup.
The LS command returns the standard success code 0 only if at least one alternate stream was found. See the topic "Calling From a Batch File" below for a usage example. Like most standard command line commands, the stream commands return the standard exit codes that can be analyzed with the if errorlevel batch command.
There are two possible exit codes: 0 means success, and 1 means error. The technique is illustrated by the following example batch file:. The LS command returns the standard success code 0 when at least one alternate stream present. The following example shows how to check for presence of alternate streams:. This batch file FS. All the content is provided on the "as is" basis and without any warranty, express or implied.
You can use the supplied tools and examples for any commercial or non-commercial purpose without charge. You can copy and redistribute these tools and examples freely, provided that you distribute the original umodified archives.
The Command Line Tools section contains a detailed description of the tools and usage examples. These sources supplement the Programming Considerations section and can be used as reference code. Home Product Download License How to. Comparing with earlier file systems like FAT, NTFS significantly expands the customary concept of a file as a named portion of data: The unnamed stream is a mandatory element and is always present.
System Support for Stream Operations The good news is the Windows Explorer and the command-line copy command recognize alternate streams and correctly copy multi-stream files. So When to Use Alternate Streams? Programming Considerations In order to improve readability, the code examples below don't include any error processing.
There are two specific cases you should be aware of: Unnamed stream to unnamed stream: treated as a file operation, that is all the named streams also get copied. Renaming a Stream It seems there is no way - documented or undocumented - to rename a stream short of directly modifying the corresponding MFT entry. StreamSize, fsd. Luid ; tp. Command Line Tools All our stream-enabled command line tools are free and can be downloaded from the download section.
Delete Stream Usage: ds stream Delete the specified stream, for example ds stream. The command don't ask for confirmation, so be careful. Usage: rs file oldname newname Rename the stream oldname of the file file to newname. For example, the command rs stream.
List Streams This command lists all streams of the specified file and their size. Usage: ls file Example: The LS command returns the standard success code 0 only if at least one alternate stream was found. Calling From a Batch File Like most standard command line commands, the stream commands return the standard exit codes that can be analyzed with the if errorlevel batch command.
The technique is illustrated by the following example batch file: echo off echo Copying stream Please refer to the Windows Help to learn more about Windows batch files and batch commands.
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