Get extracted size from tgz before extracting

Question

Is it possible to get the size that a tgz will take up once it's extracted, but without extracting it? I basically want

tar tzf file.tgz

with sizes beside them. I'm really looking for a total, so a solution that gives total size but not specific file sizes would work.

Answer 1

If it compressed using gzip compression, you can do something like:

gunzip -l filename.tar.gz

Since a tar is not compressed, that should give you the information you need.

Answer 2

You could uncompress the file and then pipe it into wc -c, which will count the number of bytes. Like so:

zcat myfile.tar.gz | wc -c

Answer 3

Hm I would prefer something like:

tar vtzf somefile.tar.gz |awk '{SUM += $3} END {print SUM}'

Answer 4

zcat file.tgz | wc -c

Will give you the number of characters taken up by the uncompressed .tar file, which will be very close to correct.