#define _GNU_SOURCE

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <unistd.h>

int main() {
    mlockall(MCL_CURRENT);

    pid_t pid = fork();
    if (pid == 0) {
        _exit(0);
    }

    const struct timespec zero = {2, 0};

    sigset_t smask;
    sigemptyset(&smask);

    pselect(0, 0, 0, 0, &zero, &smask);

    printf("Success on pid %d\n", pid);
}