111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
/* Copyright 2005 Red Hat, Inc.
|
|
*
|
|
* Portions extraced from various ALSA code:
|
|
* Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
|
|
* Jaroslav Kysela <perex@suse.cz>
|
|
*
|
|
* This software may be freely redistributed under the terms of the GNU
|
|
* public license.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <alsa/asoundlib.h>
|
|
|
|
#define ALSA_CONFIG_PATH "/etc/asound.state"
|
|
|
|
int get_card_number()
|
|
{
|
|
char *devname, *action;
|
|
|
|
action = getenv("ACTION");
|
|
if (!action || strcmp(action, "add"))
|
|
return -1;
|
|
devname = getenv("DEVNAME");
|
|
if (!devname)
|
|
return -1;
|
|
if (!strncmp(devname, "/dev/snd/controlC", 17))
|
|
return atoi(devname + 17);
|
|
if (!strncmp(devname, "/dev/snd/pcmC", 13))
|
|
return atoi(devname + 13);
|
|
return -1;
|
|
}
|
|
|
|
int has_config(int index)
|
|
{
|
|
int rc = 0;
|
|
snd_config_t *config, *control;
|
|
snd_input_t *in;
|
|
snd_ctl_t *handle;
|
|
snd_ctl_card_info_t *info;
|
|
const char *id;
|
|
char path[32];
|
|
|
|
rc = snd_config_top(&config);
|
|
if (rc < 0)
|
|
goto out;
|
|
rc = snd_input_stdio_open(&in, ALSA_CONFIG_PATH, "r");
|
|
if (rc >= 0) {
|
|
rc = snd_config_load(config, in);
|
|
snd_input_close(in);
|
|
if (rc < 0)
|
|
goto out;
|
|
}
|
|
sprintf(path, "hw:%d", index);
|
|
rc = snd_ctl_open(&handle, path, 0);
|
|
if (rc < 0)
|
|
goto out;
|
|
snd_ctl_card_info_alloca(&info);
|
|
rc = snd_ctl_card_info(handle, info);
|
|
if (rc < 0)
|
|
goto out_close;
|
|
id = snd_ctl_card_info_get_id(info);
|
|
rc = snd_config_searchv(config, &control, "state", id, "control", 0);
|
|
out_close:
|
|
snd_ctl_close(handle);
|
|
out:
|
|
return !rc;
|
|
|
|
}
|
|
|
|
int run_alsactl(int index)
|
|
{
|
|
char *args[] = { "/sbin/alsactl", "restore", NULL, NULL };
|
|
char num[10];
|
|
|
|
sprintf(num, "%d", index);
|
|
args[2] = num;
|
|
execv(args[0], args);
|
|
return 1;
|
|
}
|
|
|
|
void frob_mixer(int index)
|
|
{
|
|
char tmp[100];
|
|
snprintf(tmp, 100, "%d", index);
|
|
tmp[99] = '\0';
|
|
execl("//usr//bin//alsaunmute","//usr//bin//alsaunmute", tmp, "-v", NULL);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i;
|
|
|
|
i = get_card_number();
|
|
if (i < 0)
|
|
return 0;
|
|
if (has_config(i))
|
|
return run_alsactl(i);
|
|
else
|
|
frob_mixer(i);
|
|
|
|
return(0);
|
|
}
|