How to redefine clog to tee to original clog and a log file?

Question

I saw a useful start here:

http://www.cs.technion.ac.il/~imaman/programs/teestream.html

And it works great to make a new stream which goes to both clog and a

Answer 1

You don't want to do what your've trying to do because the 'tee' is not working at the rdbuf level. So setting the rdbuf to something else will not work, the output will only go to one stream.

You need to follow there example:

e.g.

fstream clog_file(...);
xstream clog_x(...);
TeeStream clog(clog_file, clog_x);

then use clog everywhere instead of your original clog.