文件日志自动删除备份

//log打印日志，可以保存到文件中，当日志文件大于5M，自动备份到DebugLog2.log中，DebugLog1.log继续存放最新的日志，这样就保证5M以上的最新日志

#include <netinet/in.h> // for sockaddr_in

#include <sys/types.h> // for socket

#include <sys/socket.h> // for socket

#include <stdio.h> // for printf

#include <stdlib.h> // for exit

#include <string.h> // for bzero

#include <stdio.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <arpa/inet.h>

#include <string.h>

#include <time.h>

#include <sys/time.h>

//==================================================================

// debug with time and show type with stdout or file

// if DebugLog1.log > 5M ,copy to DebugLog2.log save

//===================================================================

#define MAXLOGSIZE 5000000

#define MAXLINSIZE 16000

char logfilename1[]="DebugLog1.log";

char logfilename2[]="DebugLog2.log";

#define DEBUG_FILE 1

time_t timep;

struct tm *tmp;

typedef enum G_LOG_LEVEL

{

LOG_LEVEL_DEBUG = 0,

LOG_LEVEL_INFO,

LOG_LEVEL_WARN,

LOG_LEVEL_ERROR,

LOG_LEVEL_FATAL,

LOG_LEVEL_NONE,

}d_log_level_t;

d_log_level_t g_LogLevel;

void d_common_log_set_level(d_log_level_t LogLevel);

#define D_LOG_DEBUG(...) \

{\

if(g_LogLevel <= LOG_LEVEL_DEBUG)\

{\

{ \

time(&timep); \

tmp=localtime(&timep); \

fprintf(stdout,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(stdout,"[DEBUG] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(stdout,__VA_ARGS__); \

fflush(stdout); \

}\

if (DEBUG_FILE == 1 ) \

{ \

FILE *fp = fopen(logfilename1,"a"); \

time(&timep); \

tmp=localtime(&timep); \

fprintf(fp,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(fp,"[DEBUG] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

if (ftell(fp)>MAXLOGSIZE) {\

fclose(fp);\

rename(logfilename1,logfilename2);\

}\

else \

fclose(fp); \

}\

}\

}

#define D_LOG_INFO(...) \

{\

if(g_LogLevel <= LOG_LEVEL_INFO)\

{\

{ \

time(&timep); \

tmp=localtime(&timep); \

fprintf(stdout,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(stdout,"[INFO] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(stdout,__VA_ARGS__); \

fflush(stdout); \

}\

if (DEBUG_FILE == 1 ) \

{ \

FILE *fp = fopen(logfilename1,"a"); \

time(&timep); \

tmp=localtime(&timep); \

fprintf(fp,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(fp,"[INFO] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

if (ftell(fp)>MAXLOGSIZE) {\

fclose(fp);\

rename(logfilename1,logfilename2);\

}\

else \

fclose(fp); \

}\

}\

}

#define D_LOG_WARN(...) \

{\

if(g_LogLevel <= LOG_LEVEL_WARN)\

{\

{ \

time(&timep); \

tmp=localtime(&timep); \

fprintf(stdout,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(stdout,"[WARN] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(stdout,__VA_ARGS__); \

fflush(stdout); \

}\

if (DEBUG_FILE == 1 ) \

{ \

FILE *fp = fopen(logfilename1,"a"); \

time(&timep); \

tmp=localtime(&timep); \

fprintf(fp,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(fp,"[WARN] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

if (ftell(fp)>MAXLOGSIZE) {\

fclose(fp);\

rename(logfilename1,logfilename2);\

}\

else \

fclose(fp); \

}\

}\

}

#define D_LOG_ERROR(...) \

{\

if(g_LogLevel <= LOG_LEVEL_ERROR)\

{\

{ \

time(&timep); \

tmp=localtime(&timep); \

fprintf(stdout,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(stdout,"[ERROR] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(stdout,__VA_ARGS__); \

fflush(stdout); \

}\

if (DEBUG_FILE == 1 ) \

{ \

FILE *fp = fopen(logfilename1,"a"); \

time(&timep); \

tmp=localtime(&timep); \

fprintf(fp,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(fp,"[ERROR] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

if (ftell(fp)>MAXLOGSIZE) {\

fclose(fp);\

rename(logfilename1,logfilename2);\

}\

else \

fclose(fp); \

}\

}\

}

#define D_LOG_FATAL(...) \

{\

if(g_LogLevel <= LOG_LEVEL_FATAL)\

{\

{ \

time(&timep); \

tmp=localtime(&timep); \

fprintf(stdout,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(stdout,"[NOTICE] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(stdout,__VA_ARGS__); \

fflush(stdout); \

}\

if (DEBUG_FILE == 1 ) \

{ \

FILE *fp = fopen(logfilename1,"a"); \

time(&timep); \

tmp=localtime(&timep); \

fprintf(fp,"[%4d-%02d-%02d %02d:%02d:%02d] ", \

(1900+tmp->tm_year), \

(1+tmp->tm_mon), \

tmp->tm_mday, \

tmp->tm_hour, \

tmp->tm_min, \

tmp->tm_sec); \

fprintf(fp,"[NOTICE] %s:%s:%d:\t", __FILE__, __FUNCTION__, __LINE__); \

fprintf(fp,__VA_ARGS__); \

if (ftell(fp)>MAXLOGSIZE) {\

fclose(fp);\

rename(logfilename1,logfilename2);\

}\

else \

fclose(fp); \

}\

}\

}

void d_common_log_set_level(d_log_level_t LogLevel)

{

g_LogLevel = LogLevel;

}

int main(int argc,char **argv)

{

d_common_log_set_level(LOG_LEVEL_DEBUG);

int i;

for (i=0;i<10000;i++) {

D_LOG_DEBUG("This is a Log %04d from FILE:%s LINE:%d\n",i, __FILE__, __LINE__);

sleep(1);

}

return 0;

}