.TH "KDK_SYSTEM_SECOND" 3 "Tue Sep 19 2023" "Linux Programmer's Manual" \"
.SH NAME
kdk_system_second - 获取当前秒钟接口
.SH SYNOPSIS
.nf
.B #include <libkydate.h>
.sp
.BI "extern char* kdk_system_second();" 
.sp
Link with \fI\-lkydate\fP.
.SH "Detailed Description"
The main function of this interface is to obtain the current second.
.PP
.SH "RETURN VALUE"
On success, returns current second with type of char*; The returned string needs to be released by
.I free
.
.PP
On error, return
.BR NULL.
.SH EXAMPLES
.EX
#include "libkydate.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <glib.h>
#include <glib-object.h>

int main()
{
	int ret = kdk_system_set_long_dateformat("2230年3月4日");
	ret = kdk_system_set_short_dateformat("22/5/3");

	char *ld = kdk_system_get_longformat_date();
	printf("long res = %s\n", ld);
	free(ld);
	
	char *sd = kdk_system_get_shortformat_date();
	printf("short res = %s\n", sd);
	free(sd);

	char *ll = kdk_system_get_longformat();
	printf("longformat = %s\n", ll);
	free(ll);

	char *ss = kdk_system_get_shortformat();
	printf("shortformat = %s\n", ss);
	free(ss);

	struct tm ptr;
	
	ptr.tm_year = 2322;
	ptr.tm_mon = 9;
	ptr.tm_mday = 3;

	char *lt = kdk_system_longformat_transform(&ptr);
	printf("longformat_transform = %s\n", lt);
	free(lt);

	ptr.tm_year = 2022;
	ptr.tm_mon = 3;
	ptr.tm_mday = 2;

	char *st = kdk_system_shortformat_transform(&ptr);
	printf("shortformat_transform = %s\n", st);
	free(st);

	kdk_logn_dateinfo *info = kdk_system_login_lock_dateinfo("szm");
	printf("date = %s,time = %s,week = %s\n",info->date,info->time,info->week);
	kdk_free_logn_dateinfo(info);

	ptr.tm_hour = 19;
	ptr.tm_min = 3;
	ptr.tm_sec = 2;
	kdk_timeinfo *ti = kdk_system_timeformat_transform(&ptr);
	printf("time = %s, timesec = %s\n", ti->time, ti->timesec);
	kdk_free_timeinfo(ti);

    return 0;
}

.SH "CONFORMING TO"
These functions are as per the withdrawn POSIX.1e draft specification.
The following functions are Linux extensions:
.BR kdk_system_get_dateformat (),
.BR kdk_system_set_dateformat (),
.BR kdk_system_set_24_timeformat (),
.BR kdk_system_set_12_timeformat (),
.BR kdk_system_get_now_dateformat (),
.BR kdk_system_get_now_timeformat (),
.BR kdk_system_tran_dateformat (),
.BR kdk_system_nowtime (),
.BR kdk_system_nowdate (),
.BR kdk_system_shortweek (),
.BR kdk_system_longweek (),
.BR kdk_system_logn_dateinfo (),
.BR kdk_system_gjx_time (),
.BR kdk_date_freeall (),
.BR kdk_free_dateinfo (),
.BR kdk_free_logn_dateinfo (),
.BR kdk_system_set_long_dateformat (),
.BR kdk_system_set_short_dateformat (),
.BR kdk_system_get_longformat_date (),
.BR kdk_system_get_shortformat_date (),
.BR kdk_system_get_longformat (),
.BR kdk_system_get_shortformat (),
.BR kdk_system_longformat_transform (),
.BR kdk_system_shortformat_transform (),
.BR kdk_system_login_lock_dateinfo (),
.BR kdk_system_timeformat_transform ()
and
.BR kdk_free_timeinfo ().

.SH "SEE ALSO"
.BR kdk_system_get_dateformat (3),
.BR kdk_system_set_dateformat (3),
.BR kdk_system_set_24_timeformat (3),
.BR kdk_system_set_12_timeformat (3),
.BR kdk_system_get_now_dateformat (3),
.BR kdk_system_get_now_timeformat (3),
.BR kdk_system_tran_dateformat (3),
.BR kdk_system_nowtime (3),
.BR kdk_system_nowdate (3),
.BR kdk_system_shortweek (3),
.BR kdk_system_longweek (3),
.BR kdk_system_logn_dateinfo (3),
.BR kdk_system_gjx_time (3),
.BR kdk_date_freeall (3),
.BR kdk_free_dateinfo (3),
.BR kdk_free_logn_dateinfo (3),
.BR kdk_system_set_long_dateformat (3),
.BR kdk_system_set_short_dateformat (3),
.BR kdk_system_get_longformat_date (3),
.BR kdk_system_get_shortformat_date (3),
.BR kdk_system_get_longformat (3),
.BR kdk_system_get_shortformat (3),
.BR kdk_system_longformat_transform (3),
.BR kdk_system_shortformat_transform (3),
.BR kdk_system_login_lock_dateinfo (3),
.BR kdk_system_timeformat_transform (3)
and
.BR kdk_free_timeinfo (3).