libtcmu_time.c

/*
 * Copyright 2017 China Mobile, Inc.
 *
 * This file is licensed to you under your choice of the GNU Lesser
 * General Public License, version 2.1 or any later version (LGPLv2.1 or
 * later), or the Apache License 2.0.
 */

#include <sys/time.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

#include "libtcmu_time.h"

int time_string_now(char* buf)
{
	struct tm *tm;
	struct timeval tv;

	if (gettimeofday (&tv, NULL) < 0)
		return -1;

	/* The value maybe changed in multi-thread*/
	tm = localtime(&tv.tv_sec);
	if (tm == NULL)
		return -1;

	tm->tm_year += 1900;
	tm->tm_mon += 1;

	if (snprintf(buf, TCMU_TIME_STRING_BUFLEN,
	    "%4d-%02d-%02d %02d:%02d:%02d.%03d",
	    tm->tm_year, tm->tm_mon, tm->tm_mday,
	    tm->tm_hour, tm->tm_min, tm->tm_sec,
	    (int) (tv.tv_usec / 1000ull % 1000)) >= TCMU_TIME_STRING_BUFLEN)
		return ERANGE;

	return 0;
}