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speaker.h (701B) - Raw

      1 /*
      2  * speaker.h -- interface definitions for speaker ioctl()
      3  *
      4  * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
      5  *      modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
      6  */
      7 
      8 #ifndef	_DEV_SPEAKER_SPEAKER_H_
      9 #define	_DEV_SPEAKER_SPEAKER_H_
     10 
     11 #include <sys/ioccom.h>
     12 
     13 #define SPKRTONE        _IOW('S', 1, tone_t)    /* emit tone */
     14 #define SPKRTUNE        _IO('S', 2)             /* emit tone sequence*/
     15 
     16 typedef struct
     17 {
     18     int	frequency;	/* in hertz */
     19     int duration;	/* in 1/100ths of a second */
     20 } tone_t;
     21 
     22 /*
     23  * Strings written to the speaker device are interpreted as tunes and played;
     24  * see the spkr(4) man page for details.
     25  */
     26 
     27 #endif /* !_DEV_SPEAKER_SPEAKER_H_ */