shebang #!
Scripts usually have a #! at the very start of the first line, known as shebang.
This line identifies the interpreter for executing a script.
It has existed for a long time, but in current OSes it's of quiet limited use. Often ot can only describe an absolute path to an interpreter and a single parameter.
This tool changes that. It allows searching the interpreter in $PATH like a shell would,
allows for multiple parameters, and allows for very basic \ escapes. (Currently, the escapes
are only useful for escaping spaces and backslashes. Things like \n are the same as n).
To build this program, just type make.
To enable/disable this program, simply execute shebang --enable or shebang --disable respectively.
This registers itself as a binfmt_misc interpreter for files starting with #!.
This requires /proc/sys/fs/binfmt_misc to be mounted already.
It would be preferable if the kernel could do this on it's own, executing a program every time just for this is a bit of a waste. But since that's currently not possible, I recommend registring it as soon on startup as possible, ideally in the initramfs.