Re: [Bug-tar] What is -ignoreblocks doing?

[Sergey Poznyakoff]

Ken Williams <address@hidden> ha escrit:

> A co-worker sent me the following command as a Neat Trick for extracting
> files from whichever tarball they happen to be in:
> 
>   cat *tar.gz | tar xz -ignoreblocks --files-from f

The option -ignoreblocks is parsed as `-i -g noreblocks',
i.e. `--ignore-zeros --listed-incremental=noreblocks'. The only
meaningful part is --ignore-zeros, the --listed-incremental option does
not produce any diagnostics because (1) its argument is not used when
extracting archives and (2) it is a no-op for none-incremental archives.
In two words, the above command can more properly be written as

    cat *tar.gz | tar xz --ignore-zeros --files-from f

Regards,
Sergey