#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>

main(void) {
    const char *path = "/dev/dsp";
    int fd, ret;
    int n_channels = 2;
    int format[] = { 4096, 4096, 262144 };
    int rate[] = { 1000, 82934, 1000 };
    int i;

    fd = open(path, O_WRONLY | O_NONBLOCK, 0);
    if (fd < 0) {
        printf("Failed to open %s: %s\n", path, strerror(errno));
        exit(1);
    }

    for (i = 0; i < 3; i++) {
        int r = rate[i];
        printf("Checking rate %d\n", r);
        ioctl (fd, SNDCTL_DSP_RESET, 0);
        ret = ioctl (fd, SNDCTL_DSP_SETFMT, &format[i]);
        if (ret < 0) {
            printf("Failed to set ioctl fmt: %s\n", strerror(errno));
            exit(1);
        }
        ret = ioctl (fd, SNDCTL_DSP_CHANNELS, &n_channels);
        if (ret < 0) {
            printf("Failed to set ioctl channels: %s\n", strerror(errno));
            exit(1);
        }
        ret = ioctl (fd, SNDCTL_DSP_SPEED, &r);
        if (ret < 0) {
            printf("Failed to set ioctl speed: %s\n", strerror(errno));
            exit(1);
        }

        printf("Rate = %d\n", r);
    }

    close(fd);

    return 0;
}