What is correct way to have single Signal Handler function for multiple Signals?

Question

What is the best way in C on Linux for setting up a program that can handle multiple POSIX-signals with the same function?

For example in my code I have a handler fu

Answer 1

Is this the correct way to set up this type of handling?

Not quite - it's not safe to use printf() inside a signal handler, but you can still use write() to stdout or stderr.