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INITTODR(9) Kernel Developer's Manual INITTODR(9)

inittodrinitialize system time

void
inittodr(time_t base);

The () function determines the time and sets the system clock. It tries to pick the correct time using a set of heuristics that examine the system's battery-backed clock and the time reported by the file system, as given in base. Those heuristics include:

Once a system time has been determined, it is stored in the time variable.

The inittodr() function prints diagnostic messages if it has trouble figuring out the system time. Conditions that can cause diagnostic messages to be printed include:

resettodr(9), time(9)

On many systems, inittodr() has to convert from a time expressed in terms of year, month, day, hours, minutes, and seconds to time, expressed in seconds. Many of the implementations could share code, but do not.

Each system's heuristics for picking the correct time are slightly different.

May 31, 2007 OpenBSD-5.6