topic command "compress" - error code:512 in Operating System - HP-UX

command "compress" - error code:512

Inesa Clinko — Thu, 22 Jul 2004 08:26:15 GMT

Please help me!
After using "compress" command with
binary file "file" I accept an error
code: 512. As far as it is in script
with using ">dev/null" I cannot repeat the situation. Can I find what is the description
of this code:512 for command "compress"?
Thanks

Re: command "compress" - error code:512

Francisco J. Soler — Thu, 22 Jul 2004 08:41:03 GMT

Hi,

Go to
http://fusion.gat.com/docview/compress.html

and search for "512" string without ""

Frank.

Re: command "compress" - error code:512

Inesa Clinko — Thu, 22 Jul 2004 08:44:45 GMT

Thanks,
but your link is wrong :))
Please write me the right link.
Regards, Ina

Re: command "compress" - error code:512

Francisco J. Soler — Fri, 23 Jul 2004 00:56:07 GMT

Hi

The link works for me, but here is another one:
http://www.hmug.org/man/1/compress.html

In facth is the man of compress and there is a paragraph that says:
-------------
...
compress uses a modified Lempel-Ziv algorithm. Common substrings in the
file are first replaced by 9-bit codes 257 and up. When code 512 is
reached, the algorithm switches to 10-bit codes and continues to use more
bits until the limit specified by the -b flag is reached (the default is
16). Bits must be between 9 and 16.
----------------

Hope this helps.
Frank.