Signal handling and sigemptyset()

Question

Could anyone please explain in a really easy way to understand what sigemptyset() does? Why is it useful? I\'ve read a bunch of definitions but i just don\'t understand. Fro

Answer 1

sigemptyset simply initializes the signalmask to empty, such that it is guaranteed that no signal would be masked. (that is, all signals will be received) Basically it is similar to a memset(0) but you don't have to know the details of the implementation. So if the sa_mask member is changed you don't need to adjust your code because it will be taken care of by sigemptyset.