linux C创建文件夹然后创建txt文件添加内容

void StoreEvent(char *str)
{
 long tt;   
 struct tm *vtm;
 int i;
 char Etime[100];
 char filename[20];
 char dirname[20];
 
 char path[100];
    getcwd(path, sizeof(path));
 
 time( &tt );   
 vtm = localtime( &tt );
 sprintf(Etime,"%d-%02d-%02d %02d:%02d:%02d  ",vtm->tm_year+1900,vtm->tm_mon+1,vtm->tm_mday,vtm->tm_hour,vtm->tm_min,vtm->tm_sec);
 sprintf(filename,"/%d%02d%02d.txt",vtm->tm_year+1900,vtm->tm_mon+1,vtm->tm_mday);
 sprintf(dirname,"/%d%02d",vtm->tm_year+1900,vtm->tm_mon+1); 
 
 strcat(path,dirname);
 if(access(path,0)==-1)  //access函数是查看文件是不是存在
    {
        if (mkdir(path,0777)) //如果不存在就用mkdir函数来创建
        {
            printf("creat file bag failed!!!\n");
        }
    }

 strcat(path,filename);
 FILE *fp;
 fp = fopen(path,"ar+"); 
 if(fp == NULL)
 { 
  printf("文件异常。\n");
  return;
 }
 
 lseek(fp,0,SEEK_END); //将读写位置移到文件尾
 strcat(Etime,str);
 fputs(Etime,fp);
 fflush(fp);
 fsync(fileno(fp));  //同步缓存
 fclose(fp);
}