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alsactl: sysfs - add /sys/kernel/uevent_seqnum check to init

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2019-11-20 13:20:39 +01:00
parent c9dc401264
commit 3c740d9049
1 changed files with 9 additions and 4 deletions
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9
alsactl/init_sysfs.c
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@ -34,6 +34,8 @@ static int sysfs_init(void)
const char *env;
char sysfs_test[PATH_SIZE];
INIT_LIST_HEAD(&attr_list);
env = getenv("SYSFS_PATH");
if (env) {
strlcpy(sysfs_path, env, sizeof(sysfs_path));
@ -42,14 +44,17 @@ static int sysfs_init(void)
strlcpy(sysfs_path, "/sys", sizeof(sysfs_path));
dbg("sysfs_path='%s'", sysfs_path);
strlcpy(sysfs_test, sysfs_path, sizeof(sysfs_test));
strlcat(sysfs_test, "/kernel/uevent_seqnum", sizeof(sysfs_test));
if (access(sysfs_test, F_OK)) {
strlcpy(sysfs_test, sysfs_path, sizeof(sysfs_test));
strlcat(sysfs_test, "/kernel/uevent_helper", sizeof(sysfs_test));
if (access(sysfs_test, F_OK)) {
error("sysfs path '%s' is invalid\n", sysfs_path);
error("sysfs path '%s' is invalid", sysfs_path);
return -errno;
}
}
INIT_LIST_HEAD(&attr_list);
return 0;
}