tmpnam warning saying it is dangerous

Question

I get this warning saying that tmpnam is dangerous, but I would prefer to use it, since it can be used as is in Windows as well as Linux. I was wondering why it would be con

Answer 1

if you speak about the compiler warning of MSVC:

 These functions are deprecated because more secure versions are available;
 see tmpnam_s, _wtmpnam_s.

(http://msdn.microsoft.com/de-de/library/hs3e7355(VS.80).aspx)

otherwise just read what the manpages say about the drawbacks of this function. it is mostly about a 2nd process creating exactly the same file name as your process just did.