Program must be in C:

copy a file from a source to destination using POSIX API. Your program should account for the option to copy directories.

-Do not use standard library (i.e. do not include stdlib.h nor use fopen,....etc. This defies the objective of the assignment.

-Include fcntl.h

-system calls to consider: creat, open, read, write, exit

-For directories dirent.h is useful to include, system calls to consider: opendir, readdir