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Questions tagged [7zip]

"7z" or "7-Zip" may refer either to the open-source 7z compression container format or to the file name of the executable program of the same name that is the flagship implementation of the compression format. Both are GPL-licensed and under active development.

"7z" or "7-Zip" may refer either to the open-source 7z compression container format or to the file name of the executable program of the same name that is the flagship implementation of the compression format. Both are GPL-licensed and under active development.

The 7z format is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. The LZMA SDK 4.62 was placed in the public domain in December 2008. The latest stable version of 7-Zip and LZMA SDK is version 18.05. The MIME type of 7z is application/x-7z-compressed.

The 7-Zip program is an open source file archiver. 7-Zip operates with the 7z archive format, but can read and write several other archive formats. The program can be used from a command line interface, graphical user interface, or with Microsoft Windows shell integration. 7-Zip's development began in 1999, and it is actively developed by Igor Pavlov. It is related to a cross-platform port, p7zip. 7-Zip is free software distributed under the GNU Lesser General Public License (LGPL). It was the winner of the SourceForge.net 2007 community choice awards for "Technical Design" and for "Best Project".

7z has an open architecture, so it can support any new compression methods. Now the following methods are integrated to 7z:

  1. LZMA: Improved and optimized version of LZ77 algorithm
  2. LZMA2: Improved version of LZMA
  3. PPMD: Dmitry Shkarin's PPMdH with small changes
  4. BCJ: Converter for 32-bit x86 executables
  5. BCJ2: Converter for 32-bit x86 executables
  6. BZip2: Standard BWT algorithm
  7. Deflate: Standard LZ77-based algorithm
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How does one send SSIS log provider messages to a variable

I have a SSIS package that fetches data from CSV files and retrieves them into tables. I have enabled logging throughout the package for errors and failure to a file. After the process is complete I zip all the files in the working folder (This…
maaizle
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Objective c: Need SDK to unzip .7z file

I would like to unzip .7z files in objective-c (for mac dev). I am using SSZipArchive, which is really nice, but it will not help me unzip 7z. Could you guys recommend me a good sdk to unzip the 7z? I also need to keep track of progressing during…
YU FENG
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Cascading Context Menu Explorer CommandStore Missing

I'm trying to create a new cascading menu for the windows context menu but in my registry on Windows Vista I do not have a CommandStore Key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\CommandStore\ and if I add one it does…
Chumbawamba
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Powershell or Batch EXITCODE 7zip

how can I get the exit code of a 7zip's operation? for example: 7z x filename.zip -y how can I get it? at now, I do some operations in bat, but I can change language. I found something with AHK but I cannot use that language. ps: I'm on win server…
rschirin
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Batch script not running just stops at cd of folder when trying to modify multiplue files

I have a script in my main script but this section will not function correctly you can download the full thing here with the changes i am working on and cant seemt to get to work when in theory they…
raziel23x
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Using SevenZipSharp to extract bzip2 file add a needless tar extension to file, and can't get right archive informations?

Using following code to extracting a bzip2 file to a specified directory: string[] archive_files = null; using (SevenZip.SevenZipExtractor extrator = new SevenZip.SevenZipExtractor(source_file)); { extrator.ExtractArchive(dest_directory); …
user2264637
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Developing an Application for File Compression

How can I compress a file in c/c++? Since I want to devlop an application like WinZip / WinRAR. A simpler one.
user189352
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Remove empty lines from 7zip output stream in Powershell

I'm extracting .tgz archives with Powershell and 7zip. 7zip has a forced verbose mode and pollutes my screen. I just want to display the error messages. I already removed the standard messages with FIND: Code: Write-Host "Extracting…
mles
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How to extract multiple files from 7zip compressed file using pylzma

i have a 7zip compressed file with .bup extension, after extracting this file using 7zip utility it creates a folder which contains two files....i would like to do the same thing with PyLZMA, can all the files be extracted into a folder using PyLZMA…
python.haxor
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How can I recognize Anti-items in a 7zip archive?

I'm using SharpCompress to unzip a 7zip archive. The IArchive created by ArchiveFactory.Open returns an IEnumerable, but IArchiveEntry contains nothing indicating if an entry is an anti-item. Is there a way to recognize anti-items?
mafu
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Simple solution to extract PDF.zip using PHP

I have a rather large zip file (I used 7zip to compress the files) and I must now extract the files that are on the server. I tried using CPANEL File Manager but the zip file is too big. Any ideas on how I can extract this zip file? I do not have…
Ben
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7zip cmd line version: How to zip each file into a seperate archive from batch file

I have the follwing command: for %f in (*.txt) do "C:\WINDOWS\7za.exe" a -t7z "%f.7z" "%f" which i send to a cmdprompt from a vba script. This works, but now I have to include the path to the folder on which to perform the zipping. I do this: for…
Lumpi
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Using C# SevenZipSharp - Errors on Compress

I'm currently trying to implement the SevenZipSharp functionality into my project. I've read what documentation they have and checked out the source code for notes but I'm having trouble figuring out the CompressFilesEncrypted method. I'm getting…
Encryption
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Expanding files with 7zip

I am trying to expand a zip file using 7zip but I keep getting the 7zip Usage printout. The zip exist in c:\temp The same command succeed in batch window : C:\TEMP>7z x "tryThis.zip" I tried adding the workdir path to the file,And also without the…
JavaSheriff
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An archiver that supports compression, encryption, retain permissions, and fast at retrieving file

I have a directory with a big amount of data and I want to archive it. I need Supports compression. The compression can saves a lot of disk space; Supports password encryption. The data is sensitive so I want it not readable if the disk is…
Kan Li
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