libubus: expose ubus_connect_ctx() in public API

ubus_connect_ctx() is equivalent to ubus_connect() but accepts a
pointer to a previously allocated ubus_context struct.
ubus_shutdown() is made available as an alternative to ubus_free()
to clean up contexts initialised by ubus_connect_ctx().

Signed-off-by: Delio Brignoli <dbrignoli@audioscience.com>

diff --git a/libubus.c b/libubus.c
index 18267bb..ccaa069 100644 (file)
--- a/libubus.c
+++ b/libubus.c
@@ -271,8 +271,10 @@ static void ubus_default_connection_lost(struct ubus_context *ctx)
                uloop_end();
 }
 
-static int _ubus_connect(struct ubus_context *ctx, const char *path)
+int ubus_connect_ctx(struct ubus_context *ctx, const char *path)
 {
+       memset(ctx, 0, sizeof(*ctx));
+
        ctx->sock.fd = -1;
        ctx->sock.cb = ubus_handle_data;
        ctx->connection_lost = ubus_default_connection_lost;
@@ -316,7 +318,7 @@ static void ubus_auto_connect_cb(struct uloop_timeout *timeout)
 {
        struct ubus_auto_conn *conn = container_of(timeout, struct ubus_auto_conn, timer);
 
-       if (_ubus_connect(&conn->ctx, conn->path)) {
+       if (ubus_connect_ctx(&conn->ctx, conn->path)) {
                uloop_timeout_set(timeout, 1000);
                fprintf(stderr, "failed to connect to ubus\n");
                return;
@@ -341,7 +343,7 @@ struct ubus_context *ubus_connect(const char *path)
        if (!ctx)
                return NULL;
 
-       if (_ubus_connect(ctx, path)) {
+       if (ubus_connect_ctx(ctx, path)) {
                free(ctx);
                ctx = NULL;
        }
@@ -349,10 +351,15 @@ struct ubus_context *ubus_connect(const char *path)
        return ctx;
 }
 
-void ubus_free(struct ubus_context *ctx)
+void ubus_shutdown(struct ubus_context *ctx)
 {
        blob_buf_free(&b);
        close(ctx->sock.fd);
        free(ctx->msgbuf.data);
+}
+
+void ubus_free(struct ubus_context *ctx)
+{
+       ubus_shutdown(ctx);
        free(ctx);
 }

diff --git a/libubus.h b/libubus.h
index 94e5f95..08dac49 100644 (file)
--- a/libubus.h
+++ b/libubus.h
@@ -209,10 +209,16 @@ struct ubus_auto_conn {
 };
 
 struct ubus_context *ubus_connect(const char *path);
+int ubus_connect_ctx(struct ubus_context *ctx, const char *path);
 void ubus_auto_connect(struct ubus_auto_conn *conn);
 int ubus_reconnect(struct ubus_context *ctx, const char *path);
+
+/* call this only for struct ubus_context pointers returned by ubus_connect() */
 void ubus_free(struct ubus_context *ctx);
 
+/* call this only for struct ubus_context pointers initialised by ubus_connect_ctx() */
+void ubus_shutdown(struct ubus_context *ctx);
+
 const char *ubus_strerror(int error);
 
 static inline void ubus_add_uloop(struct ubus_context *ctx)