select stops after first byte even when more bytes are available

[Przemek <przemekr at sdfeu dot org>]

Hi,

I noticed this select behaviour and I am not sure if it is a bug. Can 
not understand why it happens.
Here is a small test program:

#include <stdio.h>
#include <sys/select.h>
int
main(void)
{
   fd_set rfds;
   struct timeval tv;
   int retval;

   while (1)
   {
      FD_ZERO(&rfds);
      FD_SET(fileno(stdin), &rfds);

      retval = select(1, &rfds, 0, 0, 0);
      if (retval == -1)
         perror("select()");

      if (FD_ISSET(fileno(stdin), &rfds))
         printf("R:%02x\n", getc(stdin));
   }
   return 0;
}



Then I run it, write a few characters on a first line, hit enter, and 
only one number appears on the terminal back. Then I type some more 
characters on a second line, enter, and I have all the missing numbers 
from the first line + all the numbers from the second one:

$ ./select_issue
abcd
R:61
efgh
R:62
R:63
R:64
R:0a
R:65

When the terminal is set to 'per char mode', select returns after every 
key pressed, but the issue is still there when I paste several 
characters at once (only the first character code is displayed, then 
program waits for more input).

GCC (Ubuntu 4.8.2-19ubuntu1) 4.8.2
GNU C Library (Ubuntu EGLIBC 2.19-0ubuntu6.6) stable release version 
2.19

Best regards,
Przemyslaw.