i386/junos/ucla/src/lab3/lib/console.c

   1
   2 #include <inc/string.h>
   3 #include <inc/lib.h>
   4
   5 void
   6 cputchar(int ch)
   7 {
   8         char c = ch;
   9
  10         // Unlike standard Unix's putchar,
  11         // the cputchar function _always_ outputs to the system console.
  12         sys_cputs(&c, 1);
  13 }
  14
  15 int
  16 getchar(void)
  17 {
  18         int r;
  19         // sys_cgetc does not block, but getchar should.
  20         while ((r = sys_cgetc()) == 0)
  21                 ;
  22         return r;
  23 }
  24
  25