My solution displays the percentage of the tarball that is currently being uncompressed and written. I use this when writing out 2GB root filesystem images. You really need a progress bar for these things. What I do is use gzip --list to get the total uncompressed size of the tarball. From that I calculate the blocking-factor needed to divide the file into 100 parts. Finally, I print a checkpoint message for each block. For a 2GB file this gives about 10MB a block. If that is too big then you can divide the BLOCKING_FACTOR by 10 or 100, but then it's harder to print pretty output in terms of a percentage.
Thank you so much for all your help! I just took the LEED NC exam this afternoon after studying for 1 month on my own, using just the reference guide, my own notes (I’m an obsessive-compulsive note taker), and your website – no classes, workshops or sample exams – and passed! I got a 184, which I am very happy with already. Was a bit nervous because I took no sample exams nor any background in building design or construction, but in the end all the hard work paid off! Thanks again for the terrific help. Such a great feeling! =)
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