日志实现的文档说明

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日志实现的文档说明

本日志的实现有cuizong007应用纯C完成，用于监控程序的运行情况。为了方便日志的说明cuizong007列举了一个加减乘除的小程序（除法只能整除），用于说明日志的实现方式。日志程序的实现可能会存在一些不合理的地方，请多多包涵和指正，欢迎技术交流。

Author：cuizong007

Date：2012-02-09

E-mail:cuizong007@sina.com

以下是源程序：

#include <time.h>

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <sys/stat.h>

#include <sys/types.h>

/* open log 1,close log 0 */

#define LOG_RW 1

#define CONTENT_LEN 1024

char log_content[CONTENT_LEN];

int log_txt(int content_size)

{

int openfd = 0, write_num = 0;

time_t timer;

char time_tmp[30],time_tmp_name[13];

struct tm * timenow;

memset(time_tmp, 0, sizeof(time_tmp));

memset(time_tmp_name, 0, sizeof(time_tmp_name));

timer = time(NULL);

timenow=localtime(&timer);

sprintf( time_tmp, "%d-%02d-%02d %02d:%02d:%02d ", timenow->tm_year + 1900, timenow->tm_mon + 1,

timenow->tm_mday, timenow->tm_hour, timenow->tm_min, timenow->tm_sec);

sprintf( time_tmp_name, "%d%02d%02d.log", timenow->tm_year + 1900, timenow->tm_mon + 1,timenow->tm_mday);

openfd = open(time_tmp_name, O_CREAT | O_RDWR | O_APPEND, 0644);

if(openfd < 0)

{

printf("Open fplog file failed!\n");

return 0;

}

write_num = write(openfd, time_tmp, 22);

write_num = write(openfd, log_content, content_size);

if(write_num < content_size)

{

close(openfd);

printf("Write log failed!\n");

return 0;

}

close(openfd);

return 0;

}

int log_level(int level,int content_size)

{

if(1 == level)

{

log_txt(content_size);

}

return 0;

}

int main(int argc, char * argv[])

{

int num1 = 0, num2 = 0;

char ch = '0';

//do{

sprintf(log_content,"%s","---start register log---\n");

log_level(LOG_RW, strlen(log_content));

printf("Please input:");

scanf("%d%c%d",&num1, &ch, &num2);

sprintf(log_content,"input two num:num1 = %d, num2 = %d\n",num1, num2);

log_level(LOG_RW, strlen(log_content));

switch(ch)

{

case '+':

printf("%d + %d = %d\n",num1, num2, num1 + num2);

sprintf(log_content,"%d + %d = %d\n",num1, num2, num1 + num2);