# innoextract - A tool to unpack installers created by Inno Setup

[Inno Setup](http://www.jrsoftware.org/isinfo.php) is a tool to create installers for Microsoft Windows applications. innoextract allows to extract such installers under non-Windows systems without running the actual installer using wine. innoextract currently supports installers created by Inno Setup 1.2.10 to 5.5.5.

innoextract is available under the ZLIB license - see the LICENSE file.

See the website for [Linux packages](http://constexpr.org/innoextract/#packages).

## Contact

[Website](http://constexpr.org/innoextract/)

Author: [Daniel Scharrer](http://constexpr.org/)

## Dependencies

* **[Boost](http://www.boost.org/) 1.37** or newer
* **liblzma** from [xz-utils](http://tukaani.org/xz/) *(optional)*
* **iconv** (*optional*, either as part of the system libc, as is the case with [glibc](http://www.gnu.org/software/libc/) and [uClibc](http://www.uclibc.org/), or as a separate [libiconv](http://www.gnu.org/software/libiconv/))

For Boost you will need the headers as well as the `iostreams`, `filesystem`, `date_time`, `system` and `program_options` libraries. Older Boost version may work but are not actively supported. The boost `iostreams` library needs to be build with zlib and bzip2 support.

While innoextract can be built without liblzma by manually setting `-DUSE_LZMA=OFF`, it is highly recommended and you won't be able to extract most installers created by newer Inno Setup versions without it.

To build innoextract you will also need **[CMake](http://cmake.org/) 2.8** and a working C++ compiler, as well as the development headers for liblzma and boost.

See the Website for [operating system-specific instructions](http://constexpr.org/innoextract/install).

## Compile and install

To compile innoextract, run:

    $ mkdir -p build && cd build && cmake ..
    $ make

To install the binaries system-wide, run as root:

    # make install

Build options:

| Option                   | Default   | Description |
|:------------------------ |:---------:|:----------- |
| `USE_LZMA`               | `ON`      | Use `liblzma`.
| `WITH_CONV`              | *not set* | The charset conversion library to use. Valid values are `iconv`, `win32` and `builtin`^1. If not set, a library appropriate for the target platform will be chosen.
| `ENABLE_BUILTIN_CONV`    | `ON`      | Build internal Windows-1252 and UTF-16LE to UTF-18 charset conversion routines. These might be used even if `WITH_CONV` is not set to `builtin`.
| `CMAKE_BUILD_TYPE`       | `Release` | Set to `Debug` to enable debug output.
| `DEBUG`                  | `OFF`^2   | Enable debug output and runtime checks.
| `DEBUG_EXTRA`            | `OFF`     | Expensive debug options.
| `SET_WARNING_FLAGS`      | `ON`      | Adjust compiler warning flags. This should not affect the produced binaries but is useful to catch potential problems.
| `SET_OPTIMIZATION_FLAGS` | `ON`      | Adjust compiler optimization flags. For non-debug builds the only thing this does is instruct the linker to only link against libraries that are actually needed.
| `USE_CXX11`              | `ON`      | Try to compile in C++11 mode if available.
| `USE_DYNAMIC_UTIMENSAT`  | `OFF`     | Dynamically load utimensat(2) if not available at compile time
| `USE_STATIC_LIBS`        | `OFF`^3   | Turns on static linking for all libraries, including `-static-libgcc` and `-static-libstdc++`. You can also use the individual options below:
| `LZMA_USE_STATIC_LIBS`   | `OFF`^4   | Statically link `liblzma`.
| `Boost_USE_STATIC_LIBS`  | `OFF`^4   | Statically link Boost. See also `FindBoost.cmake`
| `ZLIB_USE_STATIC_LIBS`   | `OFF`^4   | Statically link `libz`. (used via Boost)
| `BZip2_USE_STATIC_LIBS`  | `OFF`^4   | Statically link `libbz2`. (used via Boost)
| `iconv_USE_STATIC_LIBS`  | `OFF`^4   | Statically link `libiconv`.
1. The builtin charset conversion only supports Windows-1252 and UTF-16LE. This is normally enough for filenames, but custom message strings (which can be included in filenames) may use arbitrary encodings.
2. Enabled automatically if `CMAKE_BUILD_TYPE` is set to `Debug`.
3. Under Windows, the default is `ON`.
4. Default is `ON` if `USE_STATIC_LIBS` is enabled.

Install options:

| Option                      | Default              | Description |
|:--------------------------- |:--------------------:|:----------- |
| `CMAKE_INSTALL_PREFIX`      | `/usr/local`         | Where to install innoextract.
| `CMAKE_INSTALL_BINDIR`      | `bin`                | Location for binaries (relative to prefix).
| `CMAKE_INSTALL_DATAROOTDIR` | `share`              | Location for data files (relative to prefix).
| `CMAKE_INSTALL_MANDIR`      | `${DATAROOTDIR}/man` | Location for man pages (relative to prefix).

Set options by passing `-D<option>=<value>` to cmake.

## Run

To extract a setup file to the current directory run:

    $ innoextract <file>

A list of available options can be retrieved using

    $ innoextract --help

Documentation is also available as a man page:

    $ man 1 innoextract

## Limitations

* innoextract currently only supports extracting all the data. There is no support for extracting individual files or components and limited support for extracting language-specific files.

* Included scripts and checks are not executed.

* The mapping from Inno Setup variables like the application directory to subdirectories is hard-coded.

* innoextract does not check if an installer includes multiple files with the same name and will continually overwrite the destination file when extracting.

* Names for data slice/disk files in multi-file installers must follow the standard naming scheme.

* Encrypted installers are not supported.

A perhaps more complete, but Windows-only, tool to extract Inno Setup files is [innounp](http://innounp.sourceforge.net/).

Extracting Windows installer executables created by programs other than Inno Setup is out of the scope of this project. Some of these can be unpacked by the following programs:

* [cabextract](http://www.cabextract.org.uk/)

* [unshield](https://github.com/twogood/unshield)

## Disclaimer

This project is in no way associated with Inno Setup or [www.jrsoftware.org](http://www.jrsoftware.org/).