A better Beep
Marcelo Duarte
marcelotduarte at gmail.com
Tue May 17 08:43:25 CDT 2005
Whats happens if a program calls bepp with invalid values for dwFreq and
dwDur on a linux console?
(the programmer thinks that dwFreq and dwDur are ignored by Win95).
David Lee Lambert escreveu:
>Changelog:
> Support beeping with the PC speaker when running from the Linux console
>
>
>
>------------------------------------------------------------------------
>
>--- dlls/kernel/console.c.v1_39 Fri May 13 15:38:16 2005
>+++ dlls/kernel/console.c Fri May 13 21:02:19 2005
>@@ -193,9 +193,19 @@
> */
> BOOL WINAPI Beep( DWORD dwFreq, DWORD dwDur )
> {
>- static const char beep = '\a';
>- /* dwFreq and dwDur are ignored by Win95 */
>- if (isatty(2)) write( 2, &beep, 1 );
>+ if (strcmp(getenv("TERM"),"linux")==0 && isatty(2)) {
>+ /* the Linux console supports setting frequency and duration */
>+ char szBeep[50];
>+ snprintf(szBeep,50,"\x1B[10;%d]\x1B[11;%d]\a",(int)dwFreq,(int)dwDur);
>+ write( 2, szBeep, strlen(szBeep) );
>+ usleep(dwDur*1000);
>+ } else if (isatty(2)) {
>+ /* dwFreq and dwDur are ignored by Win95 */
>+ static const char beep = '\a';
>+ write( 2, &beep, 1 );
>+ } else {
>+ /* TODO: we could play a .wav file instead... */
>+ }
> return TRUE;
> }
>
>
>
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