Commit dbd821ac authored by Lennart Poettering's avatar Lennart Poettering
Browse files

cgroup: implement cg_get_path natively

parent 3b6fdb5b
......@@ -37,7 +37,6 @@
Currently, the only remaining functionality from libcgroup we call
here is:
- cgroup_get_subsys_mount_point()
- cgroup_walk_tree_begin()/cgroup_walk_tree_next()
- cgroup_delete_cgroup_ext()
*/
......@@ -409,13 +408,33 @@ int cg_migrate_recursive(const char *controller, const char *from, const char *t
}
int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
char *mp;
int r;
assert(controller);
assert(fs);
/* This is a very minimal lookup from controller names to
* paths. Since we have mounted most hierarchies ourselves
* should be kinda safe, but eventually we might want to
* extend this to have a fallback to actually check
* /proc/mounts. Might need caching then. */
if (streq(controller, SYSTEMD_CGROUP_CONTROLLER))
p = "systemd";
else if (startswith(controller, "name="))
p = controller + 5;
else
p = controller;
if (asprintf(&mp, "/cgroup/%s", p) < 0)
return -ENOMEM;
if ((r = cgroup_get_subsys_mount_point(controller, &mp)) != 0)
return cg_translate_error(r, errno);
if ((r = path_is_mount_point(mp)) <= 0) {
free(mp);
return r < 0 ? r : -ENOENT;
}
if (path && suffix)
r = asprintf(fs, "%s/%s/%s", mp, path, suffix);
......
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