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#include <stdio.h>
#include <sys/select.h>
#include <termios.h>
#include <unistd.h>
#include <ctype.h>
#define STDIN 0
int main()
{
struct timeval tv = {0,0};
struct termios term , termbak;
char ch;
fd_set fd;
FD_ZERO(&fd);
FD_SET( STDIN ,&fd);
tcgetattr(STDIN, &term);
termbak = term;
term.c_lflag &= ~(ICANON|ECHO);
tcsetattr(STDIN, TCSANOW, &term);
while(1)
{
FD_ZERO(&fd);
FD_SET( STDIN ,&fd);
if( 1 == select( STDIN+1,&fd,NULL,NULL,&tv)
&& 1 == read( STDIN , &ch , 1 )
&& 'q' == tolower(ch) )
break;
putchar('.');fflush(stdout);
usleep(100000);
}
tcsetattr(STDIN,TCSANOW,&termbak);
return 0;
}
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