arch/all-unix/exec/rawputchar.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Emit one character via raw IO
   6     Lang: english
   7 */
   8 #include <unistd.h>
   9
  10 /*****i***********************************************************************
  11
  12     NAME */
  13 #include <proto/exec.h>
  14
  15         AROS_LH1(void, RawPutChar,
  16
  17 /*  SYNOPSIS */
  18         AROS_LHA(UBYTE, chr, D0),
  19
  20 /*  LOCATION */
  21         struct ExecBase *, SysBase, 86, Exec)
  22
  23 /*  FUNCTION
  24         Emits a single character.
  25
  26     INPUTS
  27         chr - The character to emit
  28
  29     RESULT
  30         None.
  31
  32     NOTES
  33         This function is for very low level debugging only.
  34
  35     EXAMPLE
  36
  37     BUGS
  38
  39     SEE ALSO
  40         RawIOInit(), RawPutChar(), RawMayGetChar()
  41
  42     INTERNALS
  43
  44     HISTORY
  45
  46 *****************************************************************************/
  47 {
  48     AROS_LIBFUNC_INIT
  49
  50     /* Don't write 0 bytes */
  51     if (chr)
  52     {
  53         /* Write char to stderr */
  54         write (STDERR_FILENO, &chr, 1);
  55
  56         /* Make sure it makes it to the user. Slow but save.
  57            On Linux this gives an error (stderr is already unbuffered) */
  58 #if !(defined(__linux__) || defined(__FreeBSD__))
  59         fsync (STDERR_FILENO);
  60 #endif
  61     }
  62
  63     AROS_LIBFUNC_EXIT
  64 } /* RawPutChar */