lINUX下实现kbhit()

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lINUX下实现kbhit()，检测是否有键被按下
#include stdio.h>
#include termios.h>
#include unistd.h>
#include sys/types.h>
#include sys/time.h>
void changemode(int);
int kbhit(void);
int main(void)
{
int ch;
changemode(1);
while ( !kbhit() )
{
putchar('.');
}
ch = getchar();
printf("\nGot %c\n", ch);
changemode(0);
return 0;
}
void changemode(int dir)
{
static struct termios oldt, newt;
if ( dir == 1 )
{
tcgetattr( STDIN_FILENO, &oldt);
newt = oldt;
newt.c_lflag &= ~( ICANON | ECHO );
tcsetattr( STDIN_FILENO, TCSANOW, &newt);
}
else
tcsetattr( STDIN_FILENO, TCSANOW, &oldt);
}
int kbhit (void)
{
struct timeval tv;
fd_set rdfs;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rdfs);
FD_SET (STDIN_FILENO, &rdfs);
select(STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
return FD_ISSET(STDIN_FILENO, &rdfs);
}


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u2/77173/showart_1150435.html