How to read the .gz files

[mahesh]

hi ,some one please tell me how to open and read information in that file...please help me

[Rahul Das]

Use 7zip manager or if u are on linux ,see tar man pages.

How does the extraction of a file related to Qt ?

[mahesh]

no i am working in unix...i want to read the zip file..

[Rahul Das]

@$ gunzip file.gz
$ gzip -d file.gz @

Or may be ,you want to do some file operations with [[doc: QFile]]

What exactly are you trying to do with the file ? {If its just a unix issue , or zip issue, this is not the ideal forum to ask}

[Seba84]

[quote author="phani438" date="1324827256"]no i am working in unix...i want to read the zip file.. [/quote]

Hello phani438,

Can you explain your problem a bit better?
Is this a Qt-related question?

Bye!

[goetz]

[quote author="phani438" date="1324827256"]no i am working in unix...i want to read the zip file.. [/quote]

• on the command line?
• using QFile?
• using standard C++ iostreams?
• using standard C file handles?

[mahesh]

i want to read the the zip file using Qfile...i have a file name mtbi.gz..i want to read the information using Qfile...

[goetz]

There is no Qt builtin way to read gzip compressed files with an QIODevice. You will have to resort either to call an external program or to incorporate "zlib":http://zlib.net/ into your program. For the former, you may call "gunizp -c" plus the path to your file via [[Doc:QProcess]] and read from the standard output of the process.

[tucnak]

Way: locale unzipper in src/ directory. Build it. Now you can do it like that:
@
//.....
shell = new QProcess(this);
QStringList argv() << myfile.fileName();
shell.start("./src/unzip",argv); // or in win32 - src/unzip.exe
//.....
@
And you have to create some signal-slot connections. But at first read about QProcess and gzip

[andre]

This is a FAQ. There is an entry on it "here":http://developer.qt.nokia.com/faq/answer/how_to_compress_data_with_qt .