projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| ee741be1 AC |
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 _SPEAKER_H_ | |
| 9 | #define _SPEAKER_H_ | |
| 10 | ||
| 11 | #include <sys/ioctl.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 | } | |
| 21 | tone_t; | |
| 22 | ||
| 23 | /* | |
| 24 | * Strings written to the speaker device are interpreted as tunes and played; | |
| 25 | * see the spkr(4) man page for details. | |
| 26 | */ | |
| 27 | ||
| 28 | #endif /* _SPEAKER_H_ */ | |
| 29 | ||
| 30 | /* speaker.h ends here */ |