What was filebuf::openprot intended for, and does it have a replacement?
c++
Solution
That parameter indicates/indicated the protection mode to open the file with. It shows up in this IBM Legacy Class Library Reference.
`filebuf::openprot` is/was the default argument to the `fstream` class family constructors and `open` functions' `prot` parameter, which indicates what protection mode the file should be opened/created with.
The default protection mode used when opening files.
For example, on your system it might be `0644`, meaning that if the file is created, the owner will have read/write permissions, and everyone else will have read-only.
Seeing as in your case the default argument was being passed in anyway, I would say that it's safe to just remove.
Problem
I'm in the middle of fixing some rather old C++ code that used the old-style iostream library, and I came across the following non-compiling lines of code: ``` ::ofstream ofile; ofile.open("filename", ios::trunc, filebuf::openprot); ``` I get this error: ``` error C2039: 'openprot' : is not a member of 'std::basic_filebuf<_Elem,_Traits>' ``` So obviously it's something that's not around any more. The problem is, I can't find any information on what `openprot` did as a parameter, and I therefore can't replace it with something new, and I'm afraid to remove the parameter altogether. Anyone with any historical C++ knowledge know what this thing did?