System call "copy" for C++ compiler 4.2?

Question

System call "rename" is very close to what I am looking for but "copy" is better because I need to keep the original file. Where I can find it, or any equivalent?
MM
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Answer 1

I don't know of a Solaris system call to copy files. I do know there is no such C or C++ standard library function.
It's easy enough to write a file copy routine, however.
C++ 4.2 is obsolete and no longer supported. It predates the 1998 C++ standard by a few years.
But using old-style C++, here is a copy-file routine:
#include <fstream.h>
int copyfiles(const char* i, const char* o)
ifstream in(i, ios::in|ios::binary);
ofstream out(o, ios::out|ios::binary);
out << in.rdbuf();
return !(!in && !out);
You pass it the names of the input and output files. It opens the files in binary mode, copies input to output if possible, and reports status by returning 1 for success and 0 for failure.
Using standard C++, the routine looks like this:
#include <fstream>
bool copyfiles(const char* i, const char* o)
std::ifstream in(i, std::ios::binary);
std::ofstream out(o, std::ios::binary);
out << in.rdbuf();
return !(!in && !out);