/*
* inlist is a comma-delimited list of cgroups; so is checklist. Return
* true if any member of inlist is in checklist.
*/
static bool any_in_comma_list(const char *inlist, const char *checklist)
{
char *tmp = alloca(strlen(inlist) + 1), *tok, *saveptr = NULL;
strcpy(tmp, inlist);
for (tok = strtok_r(tmp, ",", &saveptr); tok; tok = strtok_r(NULL, ",", &saveptr)) {
if (in_comma_list(tok, checklist))
return true;
}
return false;
}
/* do we need to do any massaging here? I'm not sure... */
char *find_mounted_controller(const char *controller)
{
int i;
for (i = 0; i < num_hierarchies; i++) {
if (!hierarchies[i])
continue;
if (strcmp(hierarchies[i], controller) == 0)
return hierarchies[i];
if (in_comma_list(controller, hierarchies[i]))
return hierarchies[i];
}
return NULL;
}
/*
* If /etc/lxc/lxc.conf specifies lxc.cgroup.use = "freezer,memory",
* then clear out any other subsystems, and make sure that freezer
* and memory are both enabled
*/
static bool verify_and_prune(const char *cgroup_use)
{
const char *p;
char *e;
int i, j;
for (p = cgroup_use; p && *p; p = e + 1) {
e = strchr(p, ',');
if (e)
*e = '\0';
if (!in_subsystem_list(p)) {
ERROR("Controller %s required by lxc.cgroup.use but not available\n", p);
return false;
}
if (e)
*e = ',';
if (!e)
break;
}
for (i = 0; i < nr_subsystems;) {
if (in_comma_list(subsystems[i], cgroup_use)) {
i++;
continue;
}
free(subsystems[i]);
for (j = i; j < nr_subsystems-1; j++)
subsystems[j] = subsystems[j+1];
subsystems[nr_subsystems-1] = NULL;
nr_subsystems--;
}
return true;
}