cgls: add --machine/-M

[elogind.git] / src / login / sd-login.c

diff --git a/src/login/sd-login.c b/src/login/sd-login.c
index 157b7e0fb4e13eb0b452414a8a2d7cddf4148cde..66c4487ff88ff6a3f37f6fe117816cb540530579 100644 (file)
--- a/src/login/sd-login.c
+++ b/src/login/sd-login.c
@@ -591,6 +591,43 @@ _public_ int sd_get_uids(uid_t **users) {
         return r;
 }
 
+int sd_get_machine_names(char ***machines) {
+        _cleanup_closedir_ DIR *d = NULL;
+        _cleanup_strv_free_ char **l = NULL;
+        _cleanup_free_ char *md = NULL;
+        char *n;
+        int c = 0, r;
+
+        r = cg_get_machine_path(NULL, &md);
+        if (r < 0)
+                return r;
+
+        r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, md, &d);
+        if (r < 0)
+                return r;
+
+        while ((r = cg_read_subgroup(d, &n)) > 0) {
+
+                r = strv_push(&l, n);
+                if (r < 0) {
+                        free(n);
+                        return -ENOMEM;
+                }
+
+                c++;
+        }
+
+        if (r < 0)
+                return r;
+
+        if (machines) {
+                *machines = l;
+                l = NULL;
+        }
+
+        return c;
+}
+
 static inline int MONITOR_TO_FD(sd_login_monitor *m) {
         return (int) (unsigned long) m - 1;
 }
@@ -640,6 +677,27 @@ _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) {
                 good = true;
         }
 
+        if (!category || streq(category, "machine")) {
+                _cleanup_free_ char *md = NULL, *p = NULL;
+                int r;
+
+                r = cg_get_machine_path(NULL, &md);
+                if (r < 0)
+                        return r;
+
+                r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, md, NULL, &p);
+                if (r < 0)
+                        return r;
+
+                k = inotify_add_watch(fd, p, IN_MOVED_TO|IN_CREATE|IN_DELETE);
+                if (k < 0) {
+                        close_nointr_nofail(fd);
+                        return -errno;
+                }
+
+                good = true;
+        }
+
         if (!good) {
                 close_nointr(fd);
                 return -EINVAL;