Question

How to format struct timespec to string? This structure is returned e.g. by clock_gettime() on Linux gcc:

struct timespec {
    time_t   tv_sec;        /* seconds */
    long     tv_nsec;       /* nanoseconds */
};

Answer 1

One way to format it is:

printf("%lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec);