Creating fstream object from a FILE* pointer
c++, ifstream, popen
Solution
You cannot do that just in standard C++, since iostreams and C I/O are entirely separate and unrelated. You could however write your own iostream that's backed by a C FILE stream. I believe that GCC comes with one such stream class as a library extension.
Alternatively, if all you want is an object-y way of wrapping a C FILE stream, you could use a unique pointer for that purpose.
Problem
The well known way of creating an `fstream` object is: ``` ifstream fobj("myfile.txt"); ``` ie. using a filename. But I want to create an ifstream object using a file descriptor. Reason: I want to execute a command using `_popen()`. `_popen()` returns the output as a `FILE*`. So there is a FILE* pointer involved but no filename.