hex/README.adoc

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hex
===
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'hex' is yet another hex viewer. It automatically interprets fields within
files using a set of Lua scripts, colorizing them and showing descriptions on
the side. It also runs equally well in the terminal, or as an X11 client.
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At the moment there aren't that many features and we only have a few decoders.
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image::hex.png[align="center"]
Packages
--------
Regular releases are sporadic. git master should be stable enough.
You can get a package with the latest development version using Arch Linux's
https://aur.archlinux.org/packages/hex-git[AUR],
or as a https://git.janouch.name/p/nixexprs[Nix derivation].
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Documentation
-------------
See the link:hex.adoc[man page] for information about usage.
The rest of this README will concern itself with externalities.
Building and Running
--------------------
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Build-only dependencies: CMake, pkg-config, awk, liberty (included),
termo (included), asciidoctor or asciidoc (recommended but optional),
rsvg-convert (X11) +
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Runtime dependencies: ncursesw, libunistring, Lua >= 5.3 (for highlighting) +
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Optional runtime dependencies: x11 + xft + libpng (X11)
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$ git clone --recursive https://git.janouch.name/p/hex.git
$ mkdir hex/build
$ cd hex/build
$ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug
$ make
To install the application, you can do either the usual:
# make install
Or you can try telling CMake to make a package for you. For Debian it is:
$ cpack -G DEB
# dpkg -i hex-*.deb
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Having the program installed, optionally create a configuration file and run it
on a file of your choice.
Terminal caveats
----------------
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Terminals are somewhat tricky to get consistent results on, so be aware of the
following:
- Xterm needs `XTerm*metaSendsEscape: true` for the default bindings to work
- urxvt's 'vtwheel' plugin sabotages scrolling
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Performance
-----------
While the Lua API has been made considerably easy to write new decoders with,
the design is far from efficient as we make tons of new formatted strings.
Since we need Lua 5.3 features (64-bit integers), LuaJIT can't help us here.
Similar software
----------------
* https://ide.kaitai.io/ and https://codisec.com/veles/ are essentially what
this project wanted to be but the description language is purely declarative
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* https://github.com/wader/fq goes a step above, allowing transformations
of identified data
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* https://hachoir.readthedocs.io/en/latest/ seems to be strictly hierarchical,
which may not work for file formats like ELF
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* https://github.com/ruslashev/elfcat is a more interactive viewer for ELF
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Contributing and Support
------------------------
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Use https://git.janouch.name/p/hex to report any bugs, request features,
or submit pull requests. `git send-email` is tolerated. If you want to discuss
the project, feel free to join me at ircs://irc.janouch.name, channel #dev.
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Bitcoin donations are accepted at: 12r5uEWEgcHC46xd64tt3hHt9EUvYYDHe9
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License
-------
This software is released under the terms of the 0BSD license, the text of which
is included within the package along with the list of authors.