sigsegv.c

#include <sys/signal.h>
#include <unistd.h>

void handler()
{
    write(2, "a\n", 2);
}

int main(void) {
  signal(SIGSEGV, handler);
  char *info1 = (char*) 0x1;
  *info1 = 1;
  return 0;
}