yggdrasil/test.c

#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>

static void silence_sigint(int signum) {}

int main(int argc, const char **argv) {
    signal(silence_sigint, SIGINT);
    struct timespec duration;
    struct timespec remaining;

    while (1) {
        duration.tv_sec = 3;
        duration.tv_nsec = 0;

        int result = nanosleep(&duration, &remaining);

        if (result != 0) {
            assert(errno == EINTR);
            printf(
                "EINTR: remaining: sec=%lu, nsec=%u\n",
                (unsigned long) remaining.tv_sec,
                (unsigned int) remaining.tv_nsec
            );
        } else {
            printf("NO EINTR\n");
        }
    }
    return 0;
}