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Top Forums UNIX for Advanced & Expert Users Compress - How small can a file before it will create the .Z Post 28093 by Optimus_P on Thursday 12th of September 2002 05:00:58 PM
Old 09-12-2002
Re: Compress - How small can a file before it will create the .Z

Quote:
Originally posted by app4dxh
I am just curious. Compress by itself will not compress a file of zero bytes. (I know gzip does)

Without using compress -f, at what point will compress work. In other words, what is the smallest the file can be before it will create the .Z file?

Some of us here are just wondering...

Thx
sounds like you can test this one out on your own.

heck you can even write a script to start with a zero byte file and try to compress it then test the return value of the commpress command and if it failed then add 1 byte to the file then try again. adn so on. till you get a match.


look forward to your test results!!
 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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