api_nozzle_get_fd.c
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api_nozzle_get_fd.c
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	/*
	* Copyright (C) 2018-2025 Red Hat, Inc. All rights reserved.
	*
	* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
	*
	* This software licensed under GPL-2.0+
	*/

	#include "config.h"

	#include <string.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <errno.h>
	#include <stdint.h>
	#include <limits.h>
	#include <fcntl.h>

	#include "test-common.h"

	static int test(void)
	{
	char device_name[IFNAMSIZ];
	size_t size = IFNAMSIZ;
	int err=0;
	nozzle_t nozzle;
	int fd;

	printf("Testing get fd\n");

	memset(device_name, 0, size);
	nozzle = nozzle_open(device_name, size, NULL);
	if (!nozzle) {
	printf("Unable to init %s\n", device_name);
	return -1;
	}

	fd = nozzle_get_fd(nozzle);
	if (fd < 0) {
	printf("Unable to get fd\n");
	err = -1;
	goto out_clean;
	}

	if (fcntl(fd, F_GETFD) < 0) {
	printf("Unable to get valid fd\n");
	err = -1;
	goto out_clean;
	}

	printf("Testing ERROR conditions\n");

	printf("Passing empty struct to get_fd\n");
	if (nozzle_get_fd(NULL) > 0) {
	printf("Something is wrong in nozzle_get_fd sanity checks\n");
	err = -1;
	goto out_clean;
	}

	out_clean:
	if (nozzle) {
	nozzle_close(nozzle);
	}

	return err;
	}

	int main(void)
	{
	need_root();
	need_tun();

	if (test() < 0)
	return FAIL;

	return PASS;
	}