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 * $Id$ 8 */ 9 10 #ifndef _SPEAKER_H_ 11 #define _SPEAKER_H_ 12 13 #include <sys/ioctl.h> 14 15 #define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */ 16 #define SPKRTUNE _IO('S', 2) /* emit tone sequence*/ 17 18 typedef struct 19 { 20 int frequency; /* in hertz */ 21 int duration; /* in 1/100ths of a second */ 22 } 23 tone_t; 24 25 /* 26 * Strings written to the speaker device are interpreted as tunes and played; 27 * see the spkr(4) man page for details. 28 */ 29 30 #endif /* _SPEAKER_H_ */ 31 32 /* speaker.h ends here */ 33