Linux 获取当前系统时间（year-month-day h:m:s weekday)

linux系统下，获取系统时间：年月日－时分秒－星期几

#include <stdio.h>
#include <time.h>
#include <string.h>
int weekday(int w , char *buff)
{

    switch(w)
    {
        case 0:
            sprintf(buff , "%s" , "星期日");
            break;
        case 1:
            sprintf(buff , "%s" , "星期一");
            break;
        case 2:
            sprintf(buff , "%s" , "星期二");
            break;
        case 3:
            sprintf(buff , "%s" , "星期三");
            break;
        case 4:
            sprintf(buff , "%s" , "星期四");
            break;
        case 5:
            sprintf(buff , "%s" , "星期五");
            break;
        case 6:
            sprintf(buff , "%s" , "星期六");
            break;
    }
    return 0;
}
/*
*get local time (year-month-day hour-min-sec weekday)
*
*/
int getCurTime(char *strTime , int type)
{
    time_t t;
    char buff[10];
    struct tm *tm = NULL;
    t = time(NULL);

    if(t == -1)
    {
        return -1;
    }
    tm = localtime(&t);
    weekday(tm->tm_wday , buff);
    if(tm == NULL)
    {
        return -1;
    }

    if(type == 0)
    {
        sprintf(strTime , "%d年%d月%d日  %d:%d:%d   %s\n" , tm->tm_year + 1900 , tm->tm_mon + 1, tm->tm_mday , tm->tm_hour , tm->tm_min , tm->tm_sec , buff);
    }
    else if(type == 1 )
    {
        sprintf(strTime , "%d-%d-%d  %d:%d:%d   %s\n" , tm->tm_year + 1900 , tm->tm_mon + 1, tm->tm_mday , tm->tm_hour , tm->tm_min , tm->tm_sec, buff);
    }
    else if(type == 2)
    {
        sprintf(strTime , "%d_%d_%d  %d:%d:%d   %s\n" , tm->tm_year + 1900 , tm->tm_mon + 1, tm->tm_mday , tm->tm_hour , tm->tm_min , tm->tm_sec, buff);
    }
    return 0;
}
int main(int argc , char **argv)
{
    char buff[60];
    getCurTime(buff , 0);

    printf("%s \n " , buff);
    return 0;
}