1#define _GNU_SOURCE
 2#include <signal.h>
 3
 4#define SST_SIZE (_NSIG/8/sizeof(long))
 5
 6int sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
 7{
 8	unsigned long i = 0, *d = (void*) dest, *l = (void*) left, *r = (void*) right;
 9	for(; i < SST_SIZE; i++) d[i] = l[i] & r[i];
10	return 0;
11}
12