uci: add rpc_uci_replace_savedir() helper

The rpc_uci_replace_savedir() function removes all configured save directories
from the uci cursor instance and adds the given path argument as sole item.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/uci.c b/uci.c
index 91d4ba2..2d7d430 100644 (file)
--- a/uci.c
+++ b/uci.c
@@ -204,15 +204,13 @@ rpc_uci_status(void)
 }
 
 /*
- * Setup per-session delta save directory. If the passed "sid" blob attribute
- * pointer is NULL then the precedure was not invoked through the ubus-rpc so
- * we do not perform session isolation and use the default save directory.
+ * Clear all save directories from the uci cursor and append the given path
+ * as new save directory.
  */
 static void
-rpc_uci_set_savedir(struct blob_attr *sid)
+rpc_uci_replace_savedir(const char *path)
 {
        struct uci_element *e, *tmp;
-       char path[PATH_MAX];
 
        uci_foreach_element_safe(&cursor->delta_path, tmp, e)
                free(e);
@@ -220,16 +218,30 @@ rpc_uci_set_savedir(struct blob_attr *sid)
        cursor->delta_path.prev = &cursor->delta_path;
        cursor->delta_path.next = &cursor->delta_path;
 
+       if (path)
+               uci_set_savedir(cursor, path);
+}
+
+/*
+ * Setup per-session delta save directory. If the passed "sid" blob attribute
+ * pointer is NULL then the precedure was not invoked through the ubus-rpc so
+ * we do not perform session isolation and use the default save directory.
+ */
+static void
+rpc_uci_set_savedir(struct blob_attr *sid)
+{
+       char path[PATH_MAX];
+
        if (!sid)
        {
-               uci_set_savedir(cursor, "/tmp/.uci");
+               rpc_uci_replace_savedir("/tmp/.uci");
                return;
        }
 
        snprintf(path, sizeof(path) - 1,
                 RPC_UCI_SAVEDIR_PREFIX "%s", blobmsg_get_string(sid));
 
-       uci_set_savedir(cursor, path);
+       rpc_uci_replace_savedir(path);
 }
 
 /*