mirror of
https://github.com/pikami/slstatus.git
synced 2024-11-30 15:25:41 +00:00
49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if defined(__OpenBSD__)
|
|
#include <soundcard.h>
|
|
#else
|
|
#include <sys/soundcard.h>
|
|
#endif
|
|
#include <sys/ioctl.h>
|
|
#include <unistd.h>
|
|
|
|
#include "../util.h"
|
|
|
|
const char *
|
|
vol_perc(const char *card)
|
|
{
|
|
unsigned int i;
|
|
int v, afd, devmask;
|
|
char *vnames[] = SOUND_DEVICE_NAMES;
|
|
|
|
if ((afd = open(card, O_RDONLY | O_NONBLOCK)) < 0) {
|
|
fprintf(stderr, "open '%s': %s\n", card, strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (ioctl(afd, (int)SOUND_MIXER_READ_DEVMASK, &devmask) < 0) {
|
|
fprintf(stderr, "ioctl 'SOUND_MIXER_READ_DEVMASK': %s\n",
|
|
strerror(errno));
|
|
close(afd);
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < LEN(vnames); i++) {
|
|
if (devmask & (1 << i) && !strcmp("vol", vnames[i])) {
|
|
if (ioctl(afd, MIXER_READ(i), &v) < 0) {
|
|
fprintf(stderr, "ioctl 'MIXER_READ(%d)': %s\n", i,
|
|
strerror(errno));
|
|
close(afd);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
close(afd);
|
|
|
|
return bprintf("%d", v & 0xff);
|
|
}
|