Linux-IO多路复用select函数实践

 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <sys/select.h>

 int main(void)
 {
     int ret = -;
     int fd = -;
     char buf[];
     fd_set myset;
     struct timeval tm;
     fd = open("/dev/input/mouse0",O_RDONLY);
     if(fd < )
     {
         perror("open:");
         return -;
     }
     FD_ZERO(&myset);
     FD_SET(fd, &myset);
     FD_SET(, &myset);
     tm.tv_sec = ;
     tm.tv_usec = ;
     ret = select(fd + , &myset, NULL, NULL, &tm);
     if(ret < )
     {
         perror("select:");
         return -;
     }
     else if(ret == )
     {
         printf("超时了\n");
     }
     else
     {
         if(FD_ISSET(fd, &myset))
         {
             //处理鼠标
             memset(buf, , sizeof(buf));
             read(fd, buf, );
             printf("读出的鼠标:[%s]\n",buf);
         }
         if(FD_ISSET(, &myset))
         {
             //处理键盘
             memset(buf, , sizeof(buf));
             read(, buf, );
             printf("读出的键盘:[%s]\n",buf);
         }
     }
     return ;
 }