05-05-2008
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Anybody know what happened here?
162 lab2-36:~/try_direct/another> compress url.txt
url.txt: -- file unchanged (8 Replies)
Discussion started by: endeavour1985
8 Replies
2. Programming
When I gzopen & gzread from a gzip file, it works OK. But I when I try to uncompress the same data from memory (either by reading to memory with fread or mmap()ing) using decompress, I get Z_DATA_ERROR. Is it because gzip file has some kind of headers that uncompress doesn't want?
How can I get... (3 Replies)
Discussion started by: rayne
3 Replies
3. Programming
I wrote a function which for uncompressing data for gzip or deflate format using zlib,see followed code;
source param is pointed to the compressed data,len param is the size of compressed data,
dest param is for returning the address which pointed to the uncompressed data;the last gzip param tell... (0 Replies)
Discussion started by: iwishfine
0 Replies
4. UNIX for Advanced & Expert Users
hi,
I need to compress a couple files in a directory.i tried using
tar cvf filename1 filename2
but i am not able to open tar file.
please suggest how to compress more than one file in to same file
thanks in advance (2 Replies)
Discussion started by: prasee
2 Replies
5. Shell Programming and Scripting
Hi,
I am looking for the unix script which can takes the 2 month old data from a TXT file (there is one txt file in whiche messages are appended on daily basis) and compress them into new file.Please halp me out. (2 Replies)
Discussion started by: vpandey
2 Replies
6. UNIX for Dummies Questions & Answers
Hi All !
We have to compress a big data file in unix server and transfer it to windows and uncompress it using winzip in windows.
I have used the utility ZIP like the below.
zip -e <newfilename> df2_test_extract.dat
but when I compress files greater than 4 gb using zip utility, it... (4 Replies)
Discussion started by: sakthifire
4 Replies
7. BSD
Is there a port or shorthand way of installing the zlib library on FreeBSD? I currently use the following:
wget http://zlib.net/zlib-1.2.5.tar.gz
tar zxf zlib*.gz
cd zlib*\.
./configure --libdir=/usr/lib --includedir=/usr/include
make install clean
This is somewhat contrived code and for a... (4 Replies)
Discussion started by: figaro
4 Replies
8. Shell Programming and Scripting
I am trying to configure gpac. I get the error as follows.
# ./configure
error: zlib not found on system or in local libs
I have installed zlib on custom path /usr/local/myapps. I know the above error occurs when devel package or .h file is not present. Its present on the server.
# ll... (7 Replies)
Discussion started by: anilcliff
7 Replies
9. UNIX for Advanced & Expert Users
Hello I have been trying to compile glib 2.28 with needs Zlib. During the compilation process I received these messages
Then giving a look at the configure of Zlib, there was an option to static link it and I obviously used it.
So I think I can solve it by compiling a shared zlib, or by... (4 Replies)
Discussion started by: colt
4 Replies
10. Shell Programming and Scripting
Dear Experts,
I am new to this forum. Thank you for moderator to allow me to join.
I have a question about automatic compression using sh and crontab
on an application which runs on the Suse Linux Server 11 SP4.
My question is how to compress every file in a directory into its own tar... (5 Replies)
Discussion started by: Steven_2975
5 Replies
LIBZ(3) Library Functions Manual LIBZ(3)
NAME
libz - compression/decompression library
SYNOPSIS
[see zlib.h for full description]
DESCRIPTION
The libz (zlib) library is a general purpose data compression library. The code is thread safe. It provides in-memory compression and
decompression functions, including integrity checks of the uncompressed data. This version of the library supports only one compression
method (deflation) but other algorithms will be added later and will have the same stream interface.
Compression can be done in a single step if the buffers are large enough (for example if an input file is mmap'ed), or can be done by
repeated calls of the compression function. In the latter case, the application must provide more input and/or consume the output (provid-
ing more output space) before each call.
The library also supports reading and writing files in gzip (.gz) format with an interface similar to that of stdio.
The library does not install any signal handler. The decoder checks the consistency of the compressed data, so the library should never
crash even in case of corrupted input.
All functions of the compression library are documented in the file zlib.h. The distribution source includes examples of use of the
library the files example.c and minigzip.c.
A Java implementation of zlib is available in the Java Development Kit 1.1
http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
A Perl interface to zlib, written by Paul Marquess (pmarquess@bfsec.bt.co.uk) is available at CPAN (Comprehensive Perl Archive Network)
sites, such as:
ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
A Python interface to zlib written by A.M. Kuchling <amk@magnet.com> is available from the Python Software Association sites, such as:
ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
SEE ALSO
Questions about zlib should be sent to:
zlib@quest.jpl.nasa.gov or, if this fails, to the author addresses given below. The zlib home page is:
http://www.cdrom.com/pub/infozip/zlib/
The data format used by the zlib library is described by RFC (Request for Comments) 1950 to 1952 in the files:
ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
rfc1951.txt (deflate format)
rfc1952.txt (gzip format)
These documents are also available in other formats from:
ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
AUTHORS
Version 1.1.4 Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org) and Mark Adler (madler@alumni.caltech.edu).
This software is provided "as-is," without any express or implied warranty. In no event will the authors be held liable for any damages
arising from the use of this software. See the distribution directory with respect to requirements governing redistribution. The deflate
format used by zlib was defined by Phil Katz. The deflate and zlib specifications were written by L. Peter Deutsch. Thanks to all the
people who reported problems and suggested various improvements in zlib; who are too numerous to cite here.
UNIX manual page by R. P. C. Rodgers, U.S. National Library of Medicine (rodgers@nlm.nih.gov).
NOTES
Source for zlib is available in the SUNWzlibS package.
11 March 2002 LIBZ(3)