C++ FileIO Copy -VS- System("cp file1.x file2.x)

Question

Would it be quicker/efficient to write a file copy routine or should I just execute a System call to cp?

(The file system could differ [nfs, local, reiser, etc], however

Answer 1

It would not be time efficient to write a file copy routine.

It is resource intensive to call system to shell a cp.

You'll be far better served by figuring out the system (function) call that you can make to copy the file. E.g. on Windows it's just CopyFile(src, dst) if I recall correctly.