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From: | Raimund Gabriel |
Subject: | calculate tar size |
Date: | Fri, 5 Jul 2002 18:39:49 +0200 |
dear tar experts,
within a shell script dealing with backup issues
utilising a CD recorder, I am facing the problem to calculate the size of a tar
archive in advance of its creation (in order to fit into given CD size
limitations).
My preliminary observation is, that Gnu tar
1.13.17, invoked with -b1 option, uses two blocks a 512 Byte for the tar file
delinmiter containing zeroes only (which is in contrary to the info-file,
which states only one block a 512 Byte)! However with self-compiled Gnu tar
1.13, and the same tar option, I find only one block a 512 Bytes for
the tar file delimiter used as expected.
Is there a bug in version 1.13.17, or has there
been a change in specification after version 1.13, which is not reflected in the
info-file?
I am not fit enough in "c" language to get the full
insight from simply looking at the source code, so please help me to solve my
problem!
Whoever knows more about these details is kindly
asked to tell me about how to calculate a tar file size for the various tar
versions.
kind regards and thanks for your help in
advance,
Raimund |
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