In the case of InnoSetup, that's where the "installable" files are stored in some format custom to InnoSetup, but 7-zip doesn't know that. numbered "files" are just how 7-zip displays various additional, nameless sections in any generic. rsrc section contains the program's icon, dialog layouts, translations, etc.) They aren't really files at all, that's only how 7-zip represents them. data section holds initial values of all variables in the program, and the. text section holds the machine code that'll get loaded into memory and executed on the CPU, the. When you open in 7-zip an executable that doesn't contain an actual archive inside, what you're seeing is the various data "sections" that comprise an *.exe file in general. exe file (specifically, as a PE/COFF format file). And because it can't find a known archive in InnoSetup's setups and doesn't have a custom handler for InnoSetup either, it just opens the file as a generic. But it would need a special handler for InnoSetup, WISE, and others too. They can invent their own packing format (after all, the setup executable comes with the correct unpacker anyway), they can store each file in the "resource" section, they can even store some files in the program code section – there's nothing that strictly defines how a setup executable should work.įor some other setup executables (such as NSIS), 7-zip actually has a special handler just for that kind of installer. However, this is not in any way guaranteed for setup executables – they can store the packaged files in any way they want. (InstallShield has its own specific archive format, but it has an archive format nevertheless.) cab archive in the same file – 7-zip will recognize those without needing to do anything special, it just finds the ZIP header and starts from there. It won't work with all installers, or all applications, but Inno Setup Unpacker can still be a handy tool for viewing the contents of some setup files.Some setup executables just literally have an installer executable combined with a generic. LZMA dictionary size to 1Gb (implemented in IS 5.5.9). And then you just have to do much the same thing yourself. But if you must, for some reason, checking the install_script.iss will show you what the installer tries to do. The more complicated it gets, maybe with drivers to install and services to set up, the more difficult it's going to be to run it without installing. A free file archiver for extremely high compression Top Searches. Windows installer development tool 7-Zip. If it's very simple, maybe a readme file, an internet shortcut and an executable, you can probably run it immediately without installation. Unpacker for installations made by Inno Setup NSIS: Nullsoft Scriptable Install System. If it is, you'll probably see an install_script.iss file - the script which holds the instructions for the installer - and an folder with the application's various components.Ĭheck the folder to see what it contains. If your executable isn't an Inno Setup installer, you'll get an error. This tells Inno Setup Unpacker to extract the components of setup.exe into the current folder. Forget the command line switches to list file contents, test for integrity, define paths and so on - most people can get by with nothing more than this: Inno Setup Unpacker is a console application, but straightforward enough to use. The installer is supposed to prepare your system for its application to ensure it works correctly, so if you try to bypass this step then it may no longer run. This could enable you to run applications without having to install them first, although there are no guarantees. Inno Setup Unpacker is an open-source command-line tool which can extract the contents of Inno Setup installers.
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