Posted by michaelsander on 2016-05-17 16:53

Thanks. I’m not sure flush() is the solution. Maybe I can give a better example:

I put a breakpoint in _write() and looked at the “len” variable.

this code with the ‘\n’ at the end has len = 6

printf("abcd \n");

this code with the ‘\n’ at the begining has len = 1

printf("\n abcd");

The first case has the newline at the end of the string and the second case has the newline at the start of the string.

I think in both the no buffering case and the line buffering case the printf code will flush when the ‘\n’ character is seen. The problem is, in the second case, the “abcd” characters after the ‘\n’ are not printed.

thanks, Michael