Signals, Part 4: Sigaction

How and why do I use sigaction ?

To change the "signal disposition" of a process - i.e. what happens when a signal is delivered to your process - use sigaction

int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);

struct sigaction {
               void     (*sa_handler)(int);
               void     (*sa_sigaction)(int, siginfo_t *, void *);
               sigset_t   sa_mask;
               int        sa_flags;
}; 

struct sigaction sa; sa.sa_handler = handler; sigemptyset(&sa.sa_mask); //Also sigfillset sa.sa_flags = SA_RESTART; /* Restart functions if interrupted by handler */
sigaction(SIGINT, &sa, NULL)

(Under construction)