libyang issue

lyd_update_noparent.c

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <err.h>

#include <libyang/libyang.h>

static struct ly_ctx *ly_ctx;
static struct lyd_node *candidate;

static void print(struct lyd_node *config)
{
	lyd_print_fd(2, config, LYD_JSON,
		     LYP_FORMAT | LYP_WD_ALL | LYP_KEEPEMPTYCONT
			     | LYP_WITHSIBLINGS);
}

static void validate(struct lyd_node **config)
{
	if (lyd_validate(config, LYD_OPT_STRICT | LYD_OPT_CONFIG, ly_ctx) != 0)
		errx(1, "lyd_validate(): %s", ly_errmsg(ly_ctx));
}

static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path)
{
	/* do nothing */
}

int main(int argc, char **argv)
{
	const struct lys_module *module;
	struct lyd_node *node;
	const char *xpath = "/frr-ripd:ripd/instance/allow-ecmp";

	/* initialization */
	ly_ctx = ly_ctx_new(NULL, 0);
	if (!ly_ctx)
		errx(1, "ly_ctx_new(): %s", ly_errmsg(ly_ctx));

	ly_set_log_clb(ly_log_cb, 0);
	ly_ctx_set_searchdir(ly_ctx, "/usr/local/share/yang/");
	module = lys_parse_path(ly_ctx, "/usr/local/share/yang/frr-ripd.yang",
				LYS_IN_YANG);
	if (module == NULL)
		errx(1, "lys_parse_path(): %s", ly_errmsg(ly_ctx));

	validate(&candidate);

	printf("=================\n");
	printf("CANDIDATE CONFIG:\n");
	printf("=================\n");
	print(candidate);

	printf("=================\n");
	printf("UPDATING CONFIG:\n");
	printf("=================\n");
	ly_errno = 0;
	node = lyd_new_path(candidate, ly_ctx, xpath, (void *)"true", 0,
			    LYD_PATH_OPT_UPDATE | LYD_PATH_OPT_NOPARENT);
	if (node == NULL && ly_errno)
		warnx("lyd_new_path(\"%s\"): %s", xpath, ly_errmsg(ly_ctx));

	validate(&candidate);

	printf("=================\n");
	printf("CANDIDATE CONFIG:\n");
	printf("=================\n");
	print(candidate);

	/* cleanup */
	lyd_free_withsiblings(candidate);
	ly_ctx_remove_module(module, NULL);
	ly_ctx_destroy(ly_ctx, NULL);

	return 0;
}