Probably a C-Shell script. This will probably be difficult to make work on non- UNIX systems, but it will at least be in simple ASCII so it might be possible to figure out what it is doing and rewrite it.
The C Shell - A C-like shell. Don't use this.
To run the C shell, optionally running a script of stored commands. This is a much older shell than bash, but still quite good and powerful, just without some of the extra goodies bash has.
The UNIX C shell, an environment where you can issue commands to the kernel.
csh shell with a C-like syntax and advanced interactive features
represents a C-shell prompt in examples of commands. You do not type these characters when issuing the command.
C Shell. Originated from the original BSD shell. It has lots of enhancement, such as job control and command history. In addition it has a log out configuration file.
The C shell, the section called “Shell types