freezer: make methods return bool

src/lxc/freezer.c

@@ -68,7 +68,7 @@ static int do_freeze_thaw(bool freeze, struct lxc_conf *conf, const char *name,
 	return 0;
 }
 
-int lxc_freeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
+bool lxc_freeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
 {
 	int ret;
 
@@ -78,10 +78,10 @@ int lxc_freeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
 	else
 		ret = do_freeze_thaw(true, conf, name, lxcpath);
 	lxc_cmd_notify_state_listeners(name, lxcpath, !ret ? FROZEN : RUNNING);
-	return ret;
+	return ret == 0;
 }
 
-int lxc_unfreeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
+bool lxc_unfreeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
 {
 	int ret;
 
@@ -91,5 +91,5 @@ int lxc_unfreeze(struct lxc_conf *conf, const char *name, const char *lxcpath)
 	else
 		ret = do_freeze_thaw(false, conf, name, lxcpath);
 	lxc_cmd_notify_state_listeners(name, lxcpath, !ret ? RUNNING : FROZEN);
-	return ret;
+	return ret == 0;
 }

src/lxc/lxc.h

@@ -62,14 +62,14 @@ __hidden extern int lxc_monitor_close(int fd);
  * @name : the container name
  * Returns 0 on success, < 0 otherwise
  */
-__hidden extern int lxc_freeze(struct lxc_conf *conf, const char *name, const char *lxcpath);
+__hidden extern bool lxc_freeze(struct lxc_conf *conf, const char *name, const char *lxcpath);
 
 /*
  * Unfreeze all previously frozen tasks.
  * @name : the name of the container
  * Return 0 on success, < 0 otherwise
  */
-__hidden extern int lxc_unfreeze(struct lxc_conf *conf, const char *name, const char *lxcpath);
+__hidden extern bool lxc_unfreeze(struct lxc_conf *conf, const char *name, const char *lxcpath);
 
 /*
  * Retrieve the container state