mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-11-10 00:05:42 +01:00
b8560a6bbb
The initialization procedure consist from default initialization and state restoration. When restore fails for a reason or the config file contains inaccurate information, then init is called. Also, if something fails (init or restore), a file specified using -r option can be created with description what failed. It can be useful when user space decides to notify user to set the sound driver properly. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
98 lines
2.1 KiB
C
98 lines
2.1 KiB
C
/*
|
|
* Advanced Linux Sound Architecture Control Program - Support routines
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <dirent.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <alsa/asoundlib.h>
|
|
#include "alsactl.h"
|
|
|
|
int file_map(const char *filename, char **buf, size_t *bufsize)
|
|
{
|
|
struct stat stats;
|
|
int fd;
|
|
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (fstat(fd, &stats) < 0) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
|
|
if (*buf == MAP_FAILED) {
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
*bufsize = stats.st_size;
|
|
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void file_unmap(void *buf, size_t bufsize)
|
|
{
|
|
munmap(buf, bufsize);
|
|
}
|
|
|
|
size_t line_width(const char *buf, size_t bufsize, size_t pos)
|
|
{
|
|
int esc = 0;
|
|
size_t count;
|
|
|
|
for (count = pos; count < bufsize; count++) {
|
|
if (!esc && buf[count] == '\n')
|
|
break;
|
|
esc = buf[count] == '\\';
|
|
}
|
|
|
|
return count - pos;
|
|
}
|
|
|
|
void initfailed(int cardnumber, const char *reason)
|
|
{
|
|
int fp;
|
|
char *str;
|
|
|
|
if (statefile == NULL)
|
|
return;
|
|
if (snd_card_get_name(cardnumber, &str) < 0)
|
|
return;
|
|
fp = open(statefile, O_WRONLY|O_CREAT|O_APPEND, 0644);
|
|
write(fp, str, strlen(str));
|
|
write(fp, ":", 1);
|
|
write(fp, reason, strlen(reason));
|
|
write(fp, "\n", 1);
|
|
close(fp);
|
|
free(str);
|
|
}
|