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How to disable the output of 7-Zip?

I want to use 7z.exe from a command prompt to silently/quietly extract an archive. I do not want to use third-party scripts or APIs. Does 7-Zip have native support for quiet command-line extraction?

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marked as duplicate by techie007, Sathya Sep 3 '11 at 19:46

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7-Zip does not have an explicit "quiet" or "silent" mode for command line extraction.

A similar question over at Stack Overflow, Extracting a 7-Zip file "silently" - command line option, gives a possible solution using Python scripting code:

One possibility would be to spawn the child process with popen, so its output will come back to the parent to be processed/displayed (if desired) or else completely ignored (create your popen object with stdout=PIPE and stderr=PIPE to be able to retrieve the output from the child).

And then a similar question here on Super User, Redirect 7-Zip's command-line output to /dev/null on Windows when extracting a .7z file reports that the issue is mostly the output, and that by sending the output to NULL, you make the system run essentially silent:

Try doing this:

%COMSPEC% /c "%ProgramFiles%\7-Zip\7z.exe" ...

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Note: I used the answer edited into my question by someone else. Putting ` > NUL` at the end of my command line string works. I am just marking this as answer to increase my answer ration since I can't delete this post. –  oscilatingcretin Sep 7 '11 at 14:45
    
I do the same thing sometimes. It's good to note, as you do, when that happens that it isn't quite the right answer, just the most convenient one. –  music2myear Sep 7 '11 at 15:17
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Yes it does support command line use. Open a command prompt and navigate to the install folder (typically c:\program files\7-zip) and type:

7z -h

Here is the result:

7-Zip 9.20  Copyright (c) 1999-2010 Igor Pavlov  2010-11-18

Usage: 7z <command> [<switches>...] <archive_name> [<file_names>...]
       [<@listfiles...>]

<Commands>
  a: Add files to archive
  b: Benchmark
  d: Delete files from archive
  e: Extract files from archive (without using directory names)
  l: List contents of archive
  t: Test integrity of archive
  u: Update files to archive
  x: eXtract files with full paths
<Switches>
  -ai[r[-|0]]{@listfile|!wildcard}: Include archives
  -ax[r[-|0]]{@listfile|!wildcard}: eXclude archives
  -bd: Disable percentage indicator
  -i[r[-|0]]{@listfile|!wildcard}: Include filenames
  -m{Parameters}: set compression Method
  -o{Directory}: set Output directory
  -p{Password}: set Password
  -r[-|0]: Recurse subdirectories
  -scs{UTF-8 | WIN | DOS}: set charset for list files
  -sfx[{name}]: Create SFX archive
  -si[{name}]: read data from stdin
  -slt: show technical information for l (List) command
  -so: write data to stdout
  -ssc[-]: set sensitive case mode
  -ssw: compress shared files
  -t{Type}: Set type of archive
  -u[-][p#][q#][r#][x#][y#][z#][!newArchiveName]: Update options
  -v{Size}[b|k|m|g]: Create volumes
  -w[{path}]: assign Work directory. Empty path means a temporary directory
  -x[r[-|0]]]{@listfile|!wildcard}: eXclude filenames
  -y: assume Yes on all queries

So here is one example of a silent extraction:

7z x "C:\Path\To\File.zip" -y > nul
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He isn't asking about command options, he's asking specifically about silent operation from the command line. –  music2myear Sep 2 '11 at 15:39
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Yep. I actually piped the results to a text file and searched for "quiet" and "silent" because I thought the answerer's example wasn't showing something. –  oscilatingcretin Sep 2 '11 at 15:43
1  
Silent can mean different things to different people. I was assuming that the OP would read and apply the switches that they wanted, but I can certainly provide an example. –  EBGreen Sep 2 '11 at 15:45
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