|ADJFREQ(2)||System Calls Manual||ADJFREQ(2)|
adjfreq — correct
the rate of the system clock
int64_t *freq, int64_t
adjusts the rate in which time progresses if freq is
non-null. The unit of the rate of adjustment is nanoseconds per second,
shifted left 32 bits to allow for fractional values.
If oldfreq is non-null, the current value is returned.
Only the superuser may adjust the frequency.
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
adjfreq() will fail if:
adjfreq() function call first appeared
in OpenBSD 4.0.
|September 10, 2015||OpenBSD-current|