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alsactl: Store lockfile in /var/lock, add -D option to specify the lock dir

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It can not be generally assumed that the directories in which asound.state
resides are writable. Use /var/lock and allow users to alter this path.

Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Julian Scheel 2014-05-06 21:32:19 +02:00 committed by Jaroslav Kysela
parent 0d46081679
commit 2607d8deee
3 changed files with 18 additions and 3 deletions
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7
alsactl/alsactl.c
View file

@ -38,6 +38,9 @@
#ifndef SYS_PIDFILE
#define SYS_PIDFILE "/var/run/alsactl.pid"
#endif
#ifndef SYS_LOCKPATH
#define SYS_LOCKPATH "/var/lock"
#endif
int debugflag = 0;
int force_restore = 1;
@ -46,6 +49,7 @@ int do_lock = 0;
int use_syslog = 0;
char *command;
char *statefile = NULL;
char *lockpath = SYS_LOCKPATH;
#define TITLE 0x0100
#define HEADER 0x0200
@ -71,6 +75,7 @@ static struct arg args[] = {
{ HEADER, NULL, "Available state options:" },
{ FILEARG | 'f', "file", "configuration file (default " SYS_ASOUNDRC ")" },
{ 'l', "lock", "use file locking to serialize concurrent access" },
{ FILEARG | 'D', "lock-dir", "directory to use for lock files (default " SYS_LOCKPATH ")" },
{ 'F', "force", "try to restore the matching controls as much as possible" },
{ 0, NULL, " (default mode)" },
{ 'g', "ignore", "ignore 'No soundcards found' error" },
@ -232,6 +237,8 @@ int main(int argc, char *argv[])
case 'l':
do_lock = 1;
break;
case 'D':
lockpath = optarg;
case 'F':
force_restore = 1;
break;

1
alsactl/alsactl.h
View file

@ -5,6 +5,7 @@ extern int do_lock;
extern int use_syslog;
extern char *command;
extern char *statefile;
extern char *lockpath;
void info_(const char *fcn, long line, const char *fmt, ...);
void error_(const char *fcn, long line, const char *fmt, ...);

13
alsactl/lock.c
View file

@ -36,17 +36,24 @@ static int state_lock_(const char *file, int lock, int timeout)
struct flock lck;
struct stat st;
char lcktxt[12];
char *filename;
char *nfile;
if (!do_lock)
return 0;
nfile = malloc(strlen(file) + 6);
/* only use the actual filename, not the path */
filename = strrchr(file, '/');
if (!filename)
filename = file;
nfile = malloc(strlen(lockpath) + strlen(filename) + 7);
if (nfile == NULL) {
error("No enough memory...");
return -ENOMEM;
}
strcpy(nfile, file);
strcat(nfile, ".lock");
sprintf(nfile, "%s/%s.lock", lockpath, filename);
lck.l_type = lock ? F_WRLCK : F_UNLCK;
lck.l_whence = SEEK_SET;
lck.l_start = 0;