OrdinaryMagician/stuff
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Marisa the Magician 2018-05-29 14:18:48 +02:00
commit 169c745c45
4 changed files with 433 additions and 0 deletions
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bleep.c Normal file
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/* needed for usleep(), feature test macros are annoying */
#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <linux/input.h>
int fd;
/* beep boop */
void beep( int freq )
{
struct input_event e =
{
.type = EV_SND,
.code = SND_TONE,
.value = freq,
};
write(fd,&e,sizeof(struct input_event));
}
void sighnd( int signum )
{
switch ( signum )
{
case SIGINT:
case SIGTERM:
case SIGQUIT:
if ( fd >= 0 )
{
/* better clean up or this is going to beep forever */
beep(0);
close(fd);
}
exit(signum);
}
}
int main( int argc, char **argv )
{
signal(SIGINT,sighnd);
signal(SIGTERM,sighnd);
signal(SIGQUIT,sighnd);
if ( argc < 2 )
return fprintf(stderr,"usage: %s <device path>\n",argv[0])||1;
fd = open(argv[1],O_RDWR);
if ( fd < 0 )
return fprintf(stderr,"failed to open %s: %s\n",argv[1],
strerror(errno))||1;
uint8_t ver[4] = {0};
if ( ioctl(fd,EVIOCGVERSION,ver) == -1 )
return fprintf(stderr,"ioctl failed: %s\n",strerror(errno))||1;
printf("Driver ver: %hhu.%hhu.%hhu\n",ver[2],ver[1],ver[0]);
struct input_id id = {0};
ioctl(fd,EVIOCGID,&id);
printf("ID: bus %#06hx vendor %#06hx product %#06hx ver %#06hx\n",
id.bustype,id.vendor,id.product,id.version);
char name[256] = "Unknown device";
ioctl(fd,EVIOCGNAME(256),name);
printf("Name: %s\n",name);
uint64_t evbits, sndbits;
if ( ioctl(fd,EVIOCGBIT(0,8),&evbits) == -1 )
return fprintf(stderr,"ioctl failed: %s\n",strerror(errno))||1;
if ( !((evbits>>EV_SND)&1) )
return fprintf(stderr,"No sound support\n")||1;
if ( ioctl(fd,EVIOCGBIT(EV_SND,8),&sndbits) == -1 )
return fprintf(stderr,"ioctl failed: %s\n",strerror(errno))||1;
if ( !((sndbits>>SND_TONE)&1) )
return fprintf(stderr,"No tone event support\n")||1;
int freq = 200, time = 200;
printf("Testing %dHz tone for %dms\n",freq,time);
beep(200);
usleep(time*1000UL);
beep(0);
close(fd);
return 0;
}