This function takes the input parameter and splits that string up into an array of component tokens that are

returned to the caller. As this is assumed to be a Linux command line $($for example, from the terminal application$),$

you need to be able to handle certain special cases: $(1)$ file redirection with the $<$ and $>$ characters, $(2)$ file

redirection with the $<<,$ and $(3)$ the pipe is the only other character used as a seperator. character $|.$ Otherwise,

you may assume that the any white$-$space character is a separator.

For example, the following is a valid command in the Bash shell: