[cs631apue] copying a file to itself

[kthompso]

This is tested in the checkCopyFailures() test case.  The expected
functionality is that the program will return an error.

https://www.cs.stevens.edu/~jschauma/631/testcp.sh

-Kyle

On 09/14/2016 12:55 AM, mseaton wrote:
> The standard version of cp does not allow copying a file to itself in
> the same directory, that is cp file1 file1. The system says the source
> and destination are the same. Should our code behave in this manner?
> Marlon
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