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)
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)
Hi all,
I wanted to know how to compress a .zlib file..
an working on unix
so pls suggest accordingly.
the file is pretty big(500 mb)
also i would like to know any weblinks where i can get more info on various compressions commands in unix
i have tried zip,compress commands
but i have not... (1 Reply)
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)
I'm trying to write my first shell script and got a bit stuck with this:
I've got myscript.sh that executes from /fromhere.
If the script is run with the syntax ./myscript.sh tothere:
I need to make a variable inside the script containing /fromhere/tothere
...and if the script is run with... (10 Replies)
I would like to install a binary from source on a custom path, say /usr/local/myapps. There is no --prefix option in ./configure How can I "make install" at custom path. I tried this.
No --prefix
root@server # ./configure --help | grep prefix
root@server #
Make install
... (3 Replies)
Hi All,
Can you please provide some pointers to move files from Base path to multiple paths in efficient way.Folder Structure is already created.
/Path/AdminUser/User1/1111/Reports/aaa.txt to /Path/User1/1111/Reports/aaa.txt
/Path/AdminUser/User1/2222/Reports/bbb.txt to... (6 Replies)
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)
Currently I am using this laborious command
lvdisplay | awk '/LV Path/ {p=$3} /LV Name/ {n=$3} /VG Name/ {v=$3} /Block device/ {d=$3; sub(".*:", "/dev/dm-", d); printf "%s\t%s\t%s\n", p, "/dev/mapper/"v"-"n, d}'
Would like to know if there is any shorter method to get this mapping of... (2 Replies)
Hello,
I am creating a file with all the source folders included in my git branch, when i grep for the used source, i found source included as relative path instead of absolute path, how can convert relative path to absolute path without changing directory to that folder and using readlink -f ? ... (4 Replies)
Discussion started by: Sekhar419
4 Replies
LEARN ABOUT CENTOS
zlib
ZLIB(3) Library Functions Manual ZLIB(3)NAME
zlib - compression/decompression library
SYNOPSIS
[see zlib.h for full description]
DESCRIPTION
The zlib library is a general purpose data compression library. The code is thread safe, assuming that the standard library functions used
are thread safe, such as memory allocation routines. 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 may be
added later with the same stream interface.
Compression can be done in a single step if the buffers are large enough 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 (providing more output space) before each call.
The library also supports reading and writing files in gzip(1) (.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 the 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 in the files test/example.c and test/minigzip.c, as well as other examples in the examples/ directory.
Changes to this version are documented in the file ChangeLog that accompanies the source.
zlib is available in Java using the java.util.zip package:
http://java.sun.com/developer/technicalArticles/Programming/compression/
A Perl interface to zlib, written by Paul Marquess (pmqs@cpan.org), is available at CPAN (Comprehensive Perl Archive Network) sites,
including:
http://search.cpan.org/~pmqs/IO-Compress-Zlib/
A Python interface to zlib, written by A.M. Kuchling (amk@magnet.com), is available in Python 1.5 and later versions:
http://docs.python.org/library/zlib.html
zlib is built into tcl:
http://wiki.tcl.tk/4610
An experimental package to read and write files in .zip format, written on top of zlib by Gilles Vollant (info@winimage.com), is available
at:
http://www.winimage.com/zLibDll/minizip.html and also in the contrib/minizip directory of the main zlib source distribution.
SEE ALSO
The zlib web site can be found at:
http://zlib.net/
The data format used by the zlib library is described by RFC (Request for Comments) 1950 to 1952 in the files:
http://tools.ietf.org/html/rfc1950 (for the zlib header and trailer format)
http://tools.ietf.org/html/rfc1951 (for the deflate compressed data format)
http://tools.ietf.org/html/rfc1952 (for the gzip header and trailer format)
Mark Nelson wrote an article about zlib for the Jan. 1997 issue of Dr. Dobb's Journal; a copy of the article is available at:
http://marknelson.us/1997/01/01/zlib-engine/
REPORTING PROBLEMS
Before reporting a problem, please check the zlib web site to verify that you have the latest version of zlib; otherwise, obtain the latest
version and see if the problem still exists. Please read the zlib FAQ at:
http://zlib.net/zlib_faq.html
before asking for help. Send questions and/or comments to zlib@gzip.org, or (for the Windows DLL version) to Gilles Vollant (info@winim-
age.com).
AUTHORS
Version 1.2.7 Copyright (C) 1995-2012 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).
2 May 2012 ZLIB(3)