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resettodr(9) [netbsd man page]

RESETTODR(9)						   BSD Kernel Developer's Manual					      RESETTODR(9)

resettodr -- set battery-backed clock from system time SYNOPSIS
void resettodr(void); DESCRIPTION
The resettodr() function sets the system's battery-backed clock based on the current system time. SEE ALSO
clock_secs_to_ymdhms(9), inittodr(9), time_second(9) BSD
March 2, 2006 BSD

Check Out this Related Man Page

TODR(9) 						   BSD Kernel Developer's Manual						   TODR(9)

todr_attach, todr_gettime, todr_settime, clock_ymdhms_to_secs, clock_secs_to_ymdhms -- time-of-day clock support SYNOPSIS
#include <dev/clock_subr.h> void todr_attach(todr_chip_handle_t); int todr_gettime(todr_chip_handle_t, struct timeval *); int todr_settime(todr_chip_handle_t, struct timeval *); void clock_secs_to_ymdhms(int, struct clock_ymdhms *); time_t clock_ymdhms_to_secs(struct clock_ymdhms *); DESCRIPTION
The todr_*() functions provide an interface to read, set and control 'time-of-day' devices. A driver for a 'time-of-day' device registers its todr_chip_handle_t with machine-dependent code using the todr_attach() function. Alternatively, a machine-dependent front-end to a 'time-of-day' device driver may obtain the todr_chip_handle_t directly. The todr_gettime() retrieves the current data and time from the TODR device and returns it in the struct timeval storage provided by the caller. todr_settime() sets the date and time in the TODR device represented by todr_chip_handle_t according to the struct timeval argument. The utilities clock_secs_to_ymdhms() and clock_ymdhms_to_secs() are provided to convert a time value in seconds to and from a structure rep- resenting the date and time as a <year,month,day,weekday,hour,minute,seconds> tuple. This structure is defined as follows: struct clock_ymdhms { u_short dt_year; /* Year */ u_char dt_mon; /* Month (1-12) */ u_char dt_day; /* Day (1-31) */ u_char dt_wday; /* Day of week (0-6) */ u_char dt_hour; /* Hour (0-23) */ u_char dt_min; /* Minute (0-59) */ u_char dt_sec; /* Second (0-59) */ }; Note: leap years are recognised by these conversion routines. RETURN VALUES
The todr_*() functions return 0 if the requested operation was successful; otherwise an error code from <sys/errno.h> shall be returned. However, behaviour is undefined if an invalid todr_chip_handle_t is passed to any of these functions. The clock_ymdhms_to_secs() function returns -1 if the time in seconds would be less that zero or too large to fit in a time_t. The clock_secs_to_ymdhms() function never fails. SEE ALSO
intersil7170(4), mk48txx(4), inittodr(9), resettodr(9), time_second(9) BSD
September 6, 2006 BSD
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