Ctypes.sh: Ffi for Bash
GitHub - taviso/ctypes.sh: A foreign function interface for bash.
ctypes.sh
This is ctypes.sh, a foreign function interface for bash.
ctypes.sh is a bash plugin that provides a foreign function interface directly
in your shell. In other words, it allows you to call routines in shared
libraries from within bash.
A (very) simple example will help illustrate:
$ dlcall puts "hello, world"
hello, world

# A more complex example, use libm to calculate sin(PI/2)
$ dlopen libm.so.6
0x172ebf0
$ dlcall -r double sin double:1.57079632679489661923
double:1.000000
ctypes.sh can extend bash scripts to accomplish tasks that were previously
impossible, or would require external helpers to be written.
ctypes.sh makes it possible to use
GTK natively in
your shell scripts, or write a high-performance http daemon.
See more examples here
prerequisites
ctypes.sh is dependent on the following libraries and programs:

libffi
bash
libelf (optional)
elfutils (optional)
libdwarf / libdw (optional)

Fedora
For recent Fedora, this should be enough:
sudo yum install elfutils-devel dnf-utils
Now you can use the debuginfo-install command to install debugging symbols for automatic structure support.
Ubuntu
For recent Ubuntu, this should be enough:
sudo apt install autoconf libltdl-dev libffi-dev libelf-dev elfutils libdw-dev pkg-config
If you want to use automatic struct support (recommended), you should also make
you have ddebs available.
install
ctypes.sh can be installed from source like this:
$ git clone https://github.com/taviso/ctypes.sh.git
$ cd ctypes.sh
$ ./autogen.sh
$ ./configure
$ make
$ [sudo] make install
By default ctypes.sh is installed into /usr/local/bin and
/usr/local/lib. You can overload the prefix path by defining the
PREFIX environment variable before installing.
$ PREFIX=$HOME make install
example
source ctypes.sh
puts () {
  dlcall puts "$@"
  return $?
}

puts "hello, world"
Here is what people have been saying about ctypes.sh:

"that's disgusting"
"this has got to stop"
"you've gone too far with this"
"is this a joke?"
"I never knew the c could stand for Cthulhu."

You can read more about ctypes.sh and see it in action on the Wiki
