add rmdir shell command and folder_delete api call

mfshell/commands/rmdir.c

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2013 Bryan Christ <bryan.christ@mediafire.com>
+ *               2014 Johannes Schauer <j.schauer@email.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "../../mfapi/apicalls.h"
+#include "../mfshell.h"
+#include "../../mfapi/mfconn.h"
+#include "../commands.h"        // IWYU pragma: keep
+
+int mfshell_cmd_rmdir(mfshell * mfshell, int argc, char **argv)
+{
+    int             retval;
+    const char     *folderkey;
+
+    if (mfshell == NULL)
+        return -1;
+
+    if (argc != 2) {
+        fprintf(stderr, "Invalid number of arguments\n");
+        return -1;
+    }
+
+    folderkey = argv[1];
+    if (folderkey == NULL)
+        return -1;
+
+    // check the lenght of the key
+    if (strlen(folderkey) != 13) {
+        return -1;
+    }
+
+    retval = mfconn_api_folder_delete(mfshell->conn, folderkey);
+    mfconn_update_secret_key(mfshell->conn);
+
+    return retval;
+}