1 #include<stdio.h>
2 #include<stdlib.h>
3 #include<unistd.h>
4 #include<string.h>
5 #include<errno.h>
6 #include<sys/types.h>
7 #include<sys/stat.h>
8 #include<fcntl.h>
9 #include<time.h>
10
11 void writelog(const char* log)
12 {
13 time_t tDate;
14 struct tm* eventTime;
15 time(&tDate);//得到系统当前时间
16 eventTime=localtime(&tDate);//将time_t数据类型转化为struct tm结构
17 int iYear = eventTime->tm_year+1900;
18 int iMon = eventTime->tm_mon +1;
19 int iDay =eventTime->tm_wday;
20 int iHour = eventTime->tm_hour;
21 int iMin = eventTime->tm_min;
22 int iSec = eventTime->tm_sec;
23
24 printf("wday =%d\n",eventTime->tm_wday); //星期几
25 printf("wday =%d\n",eventTime->tm_yday); //从一月一号到现在多少天了
26 printf("eventTime->tm_isdst = %d\n",eventTime->tm_isdst);
27
28 char sDate[16];
29 sprintf(sDate,"%04d-%02d-%02d",iYear,iMon,iDay);
30 char sTime[16];
31 sprintf(sTime,"%02d:%02d:%02d",iHour,iMin,iSec);
32 char s[1024];
33 sprintf(s,"%s %s %s\n",sDate,sTime,log);
34 FILE* p=fopen("my.log","a+");
35 if(p==NULL)
36 {
37 printf("write log my.log error:%s\n",strerror(errno));
38 }
39 else
40 {
41 fputs(s,p);
42 fclose(p);
43 }
44 }
45
46 int main(int arg, char *args[])
47 {
48 writelog("process begin");
49 printf("hello world\n");
50 writelog("process end");
51
52 return 0;
53 }
