linux c下log输出代码模板

##　模板
模本分为两个文件：log.c和log.h.

log.c

/** log.c **/
#include 
#include "log.h"

// log文件路径
#define	filepath "./ps_com_log.log"
 
//设定时间
static char * settime(char * time_s){
	time_t timer=time(NULL);
	strftime(time_s, 20, "%Y-%m-%d %H:%M:%S",localtime(&timer));
	return time_s;
}
 
/*
 *打印
 * */
static int PrintfLog(char * logText, char *  string){
	FILE * fd = NULL;
	char s[1024];
	char tmp[256];

    //使用追加方式打开文件
	fd = fopen(filepath,"a+");
	if(fd == NULL){
		return -1;
	}
	
	memset(s, 0, sizeof(s));
	memset(tmp, 0,sizeof(tmp));
	
	sprintf(tmp, "*****[pid=%d]:[", getpid());
	strcpy(s, tmp);
	
	memset(tmp, 0,sizeof(tmp));
	settime(tmp);
	strcat(s, tmp);

	strcat(s, "]*****");
	fprintf(fd, "%s", s);

	fprintf(fd, "*[%s]*****:\n",logText);	
	fprintf(fd, "%s\n",string);	
	fclose(fd);
}
 
 /*
  *日志写入
  * */
void LogWrite(char *logText,char *string)
{
	//[为支持多线程需要加锁] pthread_mutex_lock(&mutex_log); //lock. 
	//打印日志信息
	PrintfLog(logText, string);
																		
	//[为支持多线程需要加锁] pthread_mutex_unlock(&mutex_log); //unlock. 
															
}

log.h

#ifndef __LOG_H__
#define __LOG_H__
#include 
#include 
#include 
 

void LogWrite(char * logText,char *string);

#endif /* __LOG_H__ */

测试文件

既然有了log输出功能，下面就简单测试一下：

#include "stdio.h"
#include "log.h"
int main(int argv,char**argc){
	printf("test\n");
	LogWrite("INFO","Hello World!");
	LogWrite("error","H.e.l.l.o W.o.r.l.d!");
	LogWrite("mint","H e l l o W o r l d!");
	LogWrite("iout","Hallo World!");

	return 0;
}

以上代码很简单，不在过多解释。

运行结果：

*****[pid=15971]:[2018-12-05 14:24:21]******[INFO]*****:
Hello World!
*****[pid=15971]:[2018-12-05 14:24:21]******[error]*****:
H.e.l.l.o W.o.r.l.d!
*****[pid=15971]:[2018-12-05 14:24:21]******[mint]*****:
H e l l o W o r l d!
*****[pid=15971]:[2018-12-05 14:24:21]******[iout]*****:
Hallo World!