relibc/tests/waitpid.c

#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>

int main(void) {
    pid_t pid = fork();
    if (pid == 0) {
        // child
        sleep(1);
        exit(0);
    } else {
        // parent
        int stat_loc;
        waitpid(pid, &stat_loc, 0);
    }
    return 0;
}