Attachment 32540 Details for Bug 24503 – Rings the bell on an evdev kernel device.

Rings the bell on an evdev kernel device.

ring-evdev.c (text/plain), 1.28 KB, created by Kusanagi Kouichi on 2010-01-08 22:17:15 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Kusanagi Kouichi

Created: 2010-01-08 22:17:15 UTC

Size: 1.28 KB

patch

obsolete

>#define _XOPEN_SOURCE 500
>#include <fcntl.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <linux/input.h>
>
>int main(int argc, char **argv)
>{
>    const char *dev = NULL;
>    int fd, freq = 1000, duration = 100000;
>    unsigned long snd_bits;
>    struct input_event event;
>
>    opterr = 1;
>    while (1)
>    {
>	switch (getopt(argc, argv, "d:f:t:"))
>	{
>	case 'd':
>	    dev = optarg;
>	    continue;
>	case 'f':
>	    freq = strtol(optarg, NULL, 0);
>	    continue;
>	case 't':
>	    duration = strtol(optarg, NULL, 0);
>	    continue;
>	case -1:
>	    break;
>	default:
>	    continue;;
>	}
>	break;
>    }
>
>    fd = open(dev, O_WRONLY);
>    if (fd < 0)
>    {
>	perror("open");
>	return 1;
>    }
>
>    if (ioctl(fd, EVIOCGBIT(EV_SND, sizeof snd_bits), &snd_bits) == -1)
>    {
>	perror("ioctl");
>	return 1;
>    }
>
>    if (snd_bits & (1 << SND_TONE))
>    {
>	event.code = SND_TONE;
>    }
>    else if (snd_bits & (1 << SND_BELL))
>    {
>	event.code = SND_BELL;
>    }
>    else
>    {
>	puts("Neither SND_TONE nor SND_BELL is supported.");
>	return 1;
>    }
>
>    event.type = EV_SND;
>    event.value = freq;
>    if (write(fd, &event, sizeof event) < 0)
>    {
>	perror("write");
>    }
>
>    usleep(duration);
>    event.value = 0;
>    if (write(fd, &event, sizeof event) < 0)
>    {
>	perror("write");
>    }
>
>    return 0;
>}

Actions: View

Attachments on bug 24503: 31942 | 32540 | 32581 | 33303

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.