a quick look at perldoc perlfunc or perldoc.com suggests that there is no built-in copy function in perl
Limbic~Region wisely suggests File::Copy which is a core module. (You won't have to install it) and nicely returns (1) on success, (0) on failure and stuffs something useful int $!
Other people tend to do stuff like:
die "bad copy num:$err_num\n"
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