ADJFREQ(2) | System Calls Manual | ADJFREQ(2) |
adjfreq
— correct
the rate of the system clock
#include
<sys/types.h>
#include <sys/time.h>
int
adjfreq
(const
int64_t *freq, int64_t
*oldfreq);
adjfreq
()
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:
The adjfreq
() function call first appeared
in OpenBSD 4.0.
July 9, 2020 | OpenBSD-current |