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 = -1;
int fd = -1;
char buf;
fd_set myset;
struct timeval tm;
fd = open("/dev/input/mouse0",O_RDONLY);
if(fd < 0)
{
perror("open:");
return -1;
}
FD_ZERO(&myset);
FD_SET(fd, &myset);
FD_SET(0, &myset);
tm.tv_sec = 10;
tm.tv_usec = 0;
ret = select(fd + 1, &myset, NULL, NULL, &tm);
if(ret < 0)
{
perror("select:");
return -1;
}
else if(ret == 0)
{
printf("超时了\n");
}
else
{
if(FD_ISSET(fd, &myset))
{
//处理鼠标
memset(buf, 0, sizeof(buf));
read(fd, buf, 2);
printf("读出的鼠标:[%s]\n",buf);
}
if(FD_ISSET(0, &myset))
{
//处理键盘
memset(buf, 0, sizeof(buf));
read(0, buf, 2);
printf("读出的键盘:[%s]\n",buf);
}
}
return 0;
}
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