Signed-off-by: Karel Zak <kzak@redhat.com>
* @tb: a pointer to a struct libscols_table instance
* @cl: a pointer to a struct libscols_column instance
*
- * Adds @cl to @tb's column list.
+ * Adds @cl to @tb's column list. The column cannot be shared between more
+ * tables.
*
* Returns: 0, a negative number in case of an error.
*/
int scols_table_add_column(struct libscols_table *tb, struct libscols_column *cl)
{
- if (!tb || !cl || !list_empty(&tb->tb_lines))
+ if (!tb || !cl || !list_empty(&tb->tb_lines) || cl->table)
return -EINVAL;
if (cl->flags & SCOLS_FL_TREE)