#include "set.h"
#include "macro.h"
#include "util.h"
+#include "strv.h"
int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
char *fs;
}
static int join_path(const char *controller, const char *path, const char *suffix, char **fs) {
- char *t;
+ char *t = NULL;
if (!(controller || path))
return -EINVAL;
return join_path(p, path, suffix, fs);
}
+static int check(const char *p) {
+ char *cc;
+
+ assert(p);
+
+ /* Check if this controller actually really exists */
+ cc = alloca(sizeof("/sys/fs/cgroup/") + strlen(p));
+ strcpy(stpcpy(cc, "/sys/fs/cgroup/"), p);
+ if (access(cc, F_OK) < 0)
+ return -errno;
+
+ return 0;
+}
+
int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
- char *cc;
+ int r;
assert(controller);
assert(fs);
if (isempty(controller))
return -EINVAL;
+ /* Normalize the controller syntax */
p = normalize_controller(controller);
/* Check if this controller actually really exists */
- cc = alloca(sizeof("/sys/fs/cgroup/") + strlen(p));
- strcpy(stpcpy(cc, "/sys/fs/cgroup/"), p);
- if (access(cc, F_OK) < 0)
- return -errno;
+ r = check(p);
+ if (r < 0)
+ return r;
return join_path(p, path, suffix, fs);
}
*path = p;
return 0;
}
+
+char **cg_shorten_controllers(char **controllers) {
+ char **f, **t;
+
+ controllers = strv_uniq(controllers);
+
+ if (!controllers)
+ return controllers;
+
+ for (f = controllers, t = controllers; *f; f++) {
+ int r;
+ const char *p;
+
+ if (streq(*f, "systemd") || streq(*f, SYSTEMD_CGROUP_CONTROLLER)) {
+ free(*f);
+ continue;
+ }
+
+ p = normalize_controller(*f);
+
+ r = check(p);
+ if (r < 0) {
+ log_debug("Controller %s is not available, removing from controllers list.", *f);
+ free(*f);
+ continue;
+ }
+
+ *(t++) = *f;
+ }
+
+ *t = NULL;
+ return controllers;
+}