linux c下log输出代码模板示例代码

/** log.c **/
#include <unistd.h>
#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.            
}

#ifndef __LOG_H__
#define __LOG_H__
#include <stdio.h>
#include <string.h>
#include <time.h>
 

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

#endif /* __LOG_H__ */

#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;
}