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(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)
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