Using printf as a C reentry function

Question

I work with several processes and signals, and yesterday I found out that printf is not a re-entry function, so there is a risk with signal handlers. Can i do something? Is there any possibility of re-entering printf or any re-call that can replace printf?

Thanks!

Answer 1

Signal processors are generally quite complex. It is so very complicated that usually the only safe operation that must be performed inside them is to set the flag “received signal”, and then let the main loop (or in a multi-threaded application a special signal processing stream) of the program perform the actual signal processing.