Build-in Commands: Every shell needs to support a number of built-in commands, which are functions in the shell itself, not external programs. Shells directly make system calls to execute built-in commands, instead of forking a child process to handle them.
The code must be written in C.
hey buyer I am professional data analyst. I have been coding in c++ for 5 years and c++ is my primary language. I can code any data structure for you. I also have a great knowledge about ipvcs/routing protocols etc. I Plus