изучить и изменить сигнальное действие (examine and change a signal action)
Синопсис (Synopsis)
#include <signal.h>
int sigaction(int signum, const struct sigaction *restrict act,
struct sigaction *restrict oldact);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
sigaction():
_POSIX_C_SOURCE
siginfo_t:
_POSIX_C_SOURCE >= 199309L
