+ return ret;
+}
+
+__attribute__((format(printf, 3, 4)))
+int blobmsg_printf(struct blob_buf *buf, const char *name, const char *format, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start(ap, format);
+ ret = blobmsg_vprintf(buf, name, format, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+void *
+blobmsg_alloc_string_buffer(struct blob_buf *buf, const char *name, unsigned int maxlen)
+{
+ struct blob_attr *attr;
+ void *data_dest;
+
+ maxlen++;
+ attr = blobmsg_new(buf, BLOBMSG_TYPE_STRING, name, maxlen, &data_dest);
+ if (!attr)
+ return NULL;
+
+ blob_set_raw_len(buf->head, blob_pad_len(buf->head) - blob_pad_len(attr));
+ blob_set_raw_len(attr, blob_raw_len(attr) - maxlen);
+
+ return data_dest;
+}
+
+void *
+blobmsg_realloc_string_buffer(struct blob_buf *buf, unsigned int maxlen)
+{
+ struct blob_attr *attr = blob_next(buf->head);
+ int offset = attr_to_offset(buf, blob_next(buf->head)) + blob_pad_len(attr) - BLOB_COOKIE;
+ int required = maxlen + 1 - (buf->buflen - offset);
+
+ if (required <= 0)
+ goto out;
+
+ if (!blob_buf_grow(buf, required))
+ return NULL;
+ attr = blob_next(buf->head);
+
+out:
+ return blobmsg_data(attr);
+}
+
+void
+blobmsg_add_string_buffer(struct blob_buf *buf)
+{
+ struct blob_attr *attr;
+ int len, attrlen;
+
+ attr = blob_next(buf->head);
+ len = strlen(blobmsg_data(attr)) + 1;
+
+ attrlen = blob_raw_len(attr) + len;
+ blob_set_raw_len(attr, attrlen);
+ blob_fill_pad(attr);
+
+ blob_set_raw_len(buf->head, blob_raw_len(buf->head) + blob_pad_len(attr));