How to avoid using printf in a signal handler?

Question

Since printf is not reentrant, it\'s not supposed to be safe to use it in a signal handler. But I\'ve seen lots of example codes that uses printf t

Answer 1

How to avoid using printf in a signal handler?

1. Always avoid it, will say: Just don't use printf() in signal handlers.

2. At least on POSIX conforming systems, you can use write(STDOUT_FILENO, ...) instead of printf(). Formatting may not be easy however: Print int from signal handler using write or async-safe functions