/*
 * Copyright (C) 1994-2021 Altair Engineering, Inc.
 * For more information, contact Altair at www.altair.com.
 *
 * This file is part of both the OpenPBS software ("OpenPBS")
 * and the PBS Professional ("PBS Pro") software.
 *
 * Open Source License Information:
 *
 * OpenPBS is free software. You can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * OpenPBS 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 Affero General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Commercial License Information:
 *
 * PBS Pro is commercially licensed software that shares a common core with
 * the OpenPBS software.  For a copy of the commercial license terms and
 * conditions, go to: (http://www.pbspro.com/agreement.html) or contact the
 * Altair Legal Department.
 *
 * Altair's dual-license business model allows companies, individuals, and
 * organizations to create proprietary derivative works of OpenPBS and
 * distribute them - whether embedded or bundled with other software -
 * under a commercial license agreement.
 *
 * Use of Altair's trademarks, including but not limited to "PBS™",
 * "OpenPBS®", "PBS Professional®", and "PBS Pro™" and Altair's logos is
 * subject to Altair's trademark licensing policies.
 */

/**
 * @file	cnt2server
 *	Connect to the server, and if there is an error, print a more
 * 	descriptive message.
 *
 * @par	Synopsis:
 *	int cnt2server( char *server )
 *
 *	server	The name of the server to connect to. A NULL or null string
 *		for the default server.
 *
 * @par	Returns:
 *	The connection returned by pbs_connect().
 */

#include <pbs_config.h> /* the master config generated by configure */

#include <errno.h>
#include "cmds.h"
#include "auth.h"

/**
 * @brief
 *	Makes a connection to the server, returning the pbs_connect() result.
 *
 * @param[in]	server	- hostname of the pbs server to connect to
 * @param[in]	extend  - extend data to send along with the connection.
 *
 * @return	int
 * @retval	connection	success
 * @retval	0		fail
 */
int
cnt2server_extend(char *server, char *extend)
{
	int connect;

	connect = pbs_connect_extend(server, extend);
	if (connect <= 0) {
		if (pbs_errno > PBSE_) {
			switch (pbs_errno) {

				case PBSE_BADHOST:
					fprintf(stderr, "Unknown Host.\n");
					break;

				case PBSE_NOCONNECTS:
					fprintf(stderr, "Too many open connections.\n");
					break;

				case PBSE_NOSERVER:
					fprintf(stderr, "No default server name.\n");
					break;

				case PBSE_SYSTEM:
					if (errno != 0)
						perror(NULL);
					else
						fprintf(stderr, "System call failure.\n");
					break;

				case PBSE_PERM:
					fprintf(stderr, "No Permission.\n");
					break;

				case PBSE_PROTOCOL:
					fprintf(stderr, "Communication failure.\n");
					break;

				case PBSE_NOSUP:
					fprintf(stderr, "No support for requested service.\n");
					break;
			}
		} else if (errno != 0) {
			perror(NULL);
		}

		return (connect);
	}

	return (connect);
}

/**
 * @brief
 *	A wrapper function to the cnt2server_extend() call where there's
 *	no 'extend' parameter passed.
 *
 * @param[in]	server	- hostname of the pbs server to connect to
 *
 * @return      int
 * @retval      connection      success
 * @retval	0		fail
 */
int
cnt2server(char *server)
{
	return (cnt2server_extend(server, NULL));
}