[Reopening this old thread due to http://bugs.debian.org/702886 and
because some of the issues seem to be gone nowadays.]

On Tue, Feb 15, 2011 at 06:42:51PM +0100, Antonio Diaz Diaz wrote:
> Ole Tange wrote:
> >Also it would be nice if Zutils supported zip and 7z (see the attached
> >zzcat on how that can be done).

Count me in for compress'ed files, i.e. those with .Z suffix,
especially because gzip's zcat is able to do that. -- see my Debian
bug report above.

Same counts for LZMA compressed files: xzcat can uncompress them, but
zutils only can handle xz compressed files. It's just less a problem
than with .Z files because gzip's zcat can't do that anyway. ;-)

> IIRC neither zip nor 7zip support stdin.

7zr supports stdin and stdout. From the 7zr man page:

       -si    Read data from StdIn (eg: tar cf - directory | 7zr a -si

       -so    Write data to StdOut (eg: 7zr x -so directory.tar.7z |
              tar xf -)

Maybe the following is even more useful for zutils:

  /usr/bin/p7zip: a gzip like wrapper around 7zr.

And from the unzip man page:

       -c     extract  files  to  stdout/screen (``CRT'').  This
              option is similar to the -p option except that the name
              of each file is printed as it is extracted, the -a
              option is allowed, and ASCII-EBCDIC conversion is
              automatically performed if appropriate. This option is
              not listed in the unzip usage screen.

I rather see the problem with fact that zip files can contain multiple

> Also 7zip is a windows-only program,

There is a Unix port named p7zip (from whose man page I cited above).

                Kind regards, Axel
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