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speaker.h
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Editing: speaker.h
/* * speaker.h -- interface definitions for speaker ioctl() * * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993 * modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su> * * $FreeBSD$ */ #ifndef _DEV_SPEAKER_SPEAKER_H_ #define _DEV_SPEAKER_SPEAKER_H_ #include <sys/ioccom.h> #define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */ #define SPKRTUNE _IO('S', 2) /* emit tone sequence*/ typedef struct { int frequency; /* in hertz */ int duration; /* in 1/100ths of a second */ } tone_t; /* * Strings written to the speaker device are interpreted as tunes and played; * see the spkr(4) man page for details. */ #endif /* !_DEV_SPEAKER_SPEAKER_H_ */
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