Add ping to cli example, misc debug

lib/src/clixon_netconf_lib.c

@@ -1959,7 +1959,6 @@ netconf_hello_server(clixon_handle h,
     return retval;
 }
 
-
 /*! Add internal error info to existing netconf error message by rewriting
  *
  * If a eg sanity check detects errors in internal messages passing, such as from a plugin or

lib/src/clixon_yang.c

@@ -1496,6 +1496,7 @@ yn_insert1(yang_stmt *ys_parent,
  *     ...ynext...
  *   }
  * @endcode
+ * @note  NULL children are skipped, which means inext may increment by more than 1
  */
 yang_stmt *
 yn_iter(yang_stmt *yparent,
@@ -2496,6 +2497,22 @@ yang_spec_dump(yang_stmt *yspec,
     return retval;
 }
 
+/*! Dump pointers to children, debug function
+ */
+int
+yang_dump1(FILE      *f,
+           yang_stmt *yn)
+{
+    yang_stmt *ys;
+    int inext;
+
+    inext = 0;
+    while ((ys = yn_iter(yn, &inext)) != NULL) {
+        fprintf(stderr, "%2d %p %s %s\n", inext-1, ys, yang_key2str(yang_keyword_get(ys)), yang_argument_get(ys));
+    }
+    return 0;
+}
+
 /*! Print yang specification to cligen buf
  *
  * @param[in]  cb        Cligen buffer. This is where the pretty print is.

lib/src/clixon_yang_schema_mount.c

@@ -908,6 +908,7 @@ yang_schema_yspec_rm(clixon_handle h,
     int        retval = -1;
     yang_stmt *yspec = NULL;
     char      *xpath = NULL;
+
     int        ret;
 
     if ((ret = xml_yang_mount_get(h, xmnt, NULL, &xpath, &yspec)) < 0)
@@ -915,6 +916,18 @@ yang_schema_yspec_rm(clixon_handle h,
     if (ret == 1 && xpath != NULL && yspec != NULL){
         if (yang_cvec_rm(yspec, xpath) < 0)
             goto done;
+#if 0
+        cvec      *cvv;
+        /* see https://github.com/clicon/clixon-controller/issues/169
+         * cannot remove yspec since it may still be in use by caches
+         */
+        cvv = yang_cvec_get(yspec);
+        if (cvv && cvec_len(cvv) == 0){
+            ys_prune_self(yspec);
+            ys_free(yspec);
+            yspec = NULL;
+        }
+#endif
     }
     retval = 0;
  done: