diff -r cd30c7a7baf8 -r 1950f483d3c4 dav/assistant.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dav/assistant.c	Sat Feb 27 19:39:55 2016 +0100
@@ -0,0 +1,92 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2016 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <ucx/string.h>
+#include <ucx/utils.h>
+
+#include <libidav/utils.h>
+
+#include "assistant.h"
+
+char* assistant_getcfg(char *cfgname) {
+    sstr_t line;
+    char *value = NULL;
+    while(!value) {
+        printf("%s: ", cfgname);
+        line = util_readline(stdin);
+        if(line.length == 0 || !line.ptr) {
+            fprintf(stderr, "%s must be not empty\n", cfgname);
+            continue;
+        }
+        
+        value = line.ptr;
+        break;
+    }
+    return value;
+}
+
+char* assistant_getoptcfg(char *cfgname) {
+    sstr_t line;
+    char *value = NULL;
+    while(!value) {
+        printf("%s (optional): ", cfgname);
+        line = util_readline(stdin);
+        if(line.length == 0 || !line.ptr) {
+            if(line.ptr) {
+                free(line.ptr);
+            }
+            break;
+        }
+        
+        value = line.ptr;
+        break;
+    }
+    return value;
+}
+
+char* assistant_gethiddenoptcfg(char *cfgname) {
+    printf("%s (optional): ", cfgname);
+    char *pw = util_password_input("");
+    if(pw[0] == 0) {
+        free(pw);
+        pw = NULL;
+    }
+    return pw;
+}
+
+
+char* assistant_getdefcfg(char *cfgname, char *defval) {
+    char *value = assistant_getoptcfg(cfgname);
+    if(!value) {
+        value = strdup(defval);
+    }
+    return value;
+}