7zip: how to extract to std output?
I have 7z 4.65 and am trying to extract a single file to standard output. The 7z command-line help says -so
is the command-line parameter to extract to standard output, but when I try this:
>>> 7z e -so dist\dlogpkg.jar META-INF/MANIFEST.MF
7-Zip 4.65 Copyright (c) 1999-2009 Igor Pavlov 2009-02-03
Error:
I won't write data and program's messages to same terminal
how can I fix this? There doesn't seem to be a command line param to suppress the normal 7z stdout messages.
(edit: the equivalent operation in "unzip" would be
unzip -p dist\dlogpkg.jar META-INF/MANIFEST.MF
which works fine. But I'd like to use 7z for various reasons.)
pipe it to another program such as
- tee
- less
- more
i think tee
comes closest to what you want, it drops the 7z stuff and just gives you the content.
% 7z e -so dist\dlogpkg.jar META-INF/MANIFEST.MF | tee
I was also trying to figure this out. This got me what I wanted:
7z x -so my_file.zip 2> /dev/null
On Windows, 7z x -so my_file.zip 2> NUL
doesn't work, but redirection to a real file helps:
7z x -so my_file.zip 2> _garbage.txt